43results about How to "Little impact on the flow field" patented technology

The invention relates to a multiphase flow test flume system which comprises a main body, a clear water circulating system, a muddy water circulating system, a water inlet system, a control system and a water outlet switching system, wherein a support and a jack are arranged at the bottom of the main body and are fixed on the ground by supporting hinges for adjusting the width and the gradient of a flume, and the water inlet system comprises a sampling discharge outlet, a manual valve, a flowmeter and an electromagnetic valve and is connected with the top end of the main body; the control system is arranged at one side of the top end of the main body for controlling all switches, and the water outlet switching system is arranged at one outer side end of a water outlet of the main body and is connected with a clear underground water pool in the clear water circulating system and a muddy underground water pool in the muddy water circulating system. Due to the clear water circulating system and the muddy water circulating system which are independent, the invention reduces test water consumption and test cost and conveniently recycles and treats polluted water samples, and a clear water / muddy water switching device of a water outlet system is easily designed and conveniently operated so as to effectively solve the switching problem among different circulating systems.

The invention relates to air vehicle models, in particular to a model rope supporting system capable of realizing wind tunnel virtual flight. The model rope supporting system is provided with an airplane model, a rod type six-component balance, a front taper sleeve, a rear taper sleeve, a sleeve and a supporting rod. The airplane model is pulled and hung by a pulling rope, one end of the pulling rope is connected to a winch motor assembly through a pulley, and the other end of the pulling rope is connected with the connecting rod and used for hanging and supporting the airplane model; the rod type six-component balance is coaxially arranged in the airplane model, the front end of the rod type six-component balance is connected with the front taper sleeve through bolts, and the rear end of the rod type six-component balance is connected with the rear taper sleeve through bolts; the sleeve is fixedly connected to the rear taper sleeve through bolts and installed parallel to the rod type six-component balance without making contact with the surface of the rod type six-component balance; the airplane model is locked to the front taper sleeve through bolts, the supporting rod is arranged on the sleeve and used for tying the pulling rope, and the pulling rope is connected with a pulley arranged on an external base. The model rope supporting system is easy and convenient to install and high in generality, the influence on a flow field is small, and testing is convenient.

The invention relates to a plasma-based aircraft aerodynamic characteristic analysis method. According to the method, the lift coefficient is improved and the drag coefficient is reduced based on the dielectric barrier discharge (DBD) plasma control technology. The lift-drag ratio of an aircraft is improved and the aerodynamic characteristic performance of the aircraft is improved. Furthermore, in the dielectric barrier discharge (DBD) plasma condition, the aerodynamic characteristics of the surface of the aircraft can be analyzed and obtained.

The invention discloses a device and a method realizing synergic effects of waste heat utilization, desulfurization wastewater zero-emission and smoke plume removal, the device comprises a boiler, anair preheater, a dust remover, a desulfurization tower and a chimney which are sequentially connected through a pipeline, a wastewater sedimentation tank, a wastewater concentration tower and a wastewater flashing tower simultaneously are connected to corresponding equipment in the device, a high-temperature gas required in the working process of the wastewater flashing tower and the wastewater concentration tower is taken from high-temperature flue gas during the operation of the device; and generated gases are sent into the dust remover for dust removal circulation. An acoustic wave agglomeration device and a demister are disposed in a connecting pipe between the desulfurization tower and the chimney. The method comprises the steps of concentrating and flashing the high temperature fluegas in the process of operation of the desulfurization wastewater utilization device, and finally feeding the concentrated and flashed gas to the device for circulation, thereby achieving zero emission, discharged smoke plume can be reduced by use of synergic effects of the reduced flue gas temperature, the acoustic wave agglomeration device and the demister, and the goal of energy saving and environmental protection, wastewater zero-emission and exhaust emission reduction can be comprehensively realized.

The invention relates to a mass flowmeter for highly precisely measuring mass flow directly. The mass flowmeter comprises two parallel U-shaped measuring tubes with an identical structure, a vibration exciter, two detectors, four fixed distance plates, two flanges, two end connecting tubes, two splitters, a middle connecting tube and a casing. The mass flowmeter provided by the invention has the advantages that the performance and the mechanical quality factor of a resonant sensor are effectively improved, the influence of a flow field is greatly reduced, the mass flowmeter has small flow resistance and low pressure loss and is simple to install and process, the measuring tubes have excellent dynamic balance properties, the mass flow of liquid with high viscosity and high impurity content can be measured, the application range of the Coriolis mass flowmeter is further enlarged, and the requirement of industrial development on the accuracy and the range of flow measurement is met. The mass flowmeter has great promotion effects for saving raw materials, lowering the production cost, reducing environmental pollution, increasing the profit rate and improving the product quality.

The invention discloses a lobe-shaped backward step structure, a lobe-shaped concave cavity device and an afterburning chamber. The lobe-shaped concave cavity device is a constituent part of the wall face of a solid rocket excess combustion ramjet engine. The lobe-shaped backward step structure comprises a plurality of lobe grooves and backward steps which are distributed in a staggered mode in the spanwise direction of the wall face of the solid rocket excess combustion ramjet engine. The lobe-shaped concave cavity device comprises a concave cavity, a forward step and the lobe-shaped backward step structure. The lobe-shaped backward step structure is arranged at the end, located at the upstream end of the airflow in the engine, of the concave cavity, and the forward step is arranged at the end, located at the downstream end of the airflow in the engine, of the concave cavity. By the adoption of the lobe-shaped cavity device, flames can be effectively stabilized, mixed combustion of rich combustion gas and incoming flow air in the afterburning chamber is enhanced, and meanwhile the lobe-shaped cavity device is simple in structure and suitable for the solid rocket excess combustion ramjet engine.

The invention is suitable for the field of airfoil wind tunnel test equipment, and particularly relates to an airfoil type wind tunnel test bench, which comprises an experiment flat plate, a six-component measuring balance an upper anti-interference airfoil profile and a lower anti-interference airfoil profile; a rotation adjusting flat plate is rotatably arranged on the experiment flat plate, and accurate angle adjustment is completed by using a dial arranged on the rotation adjusting flat plate, so that the airfoil wind tunnel test bench is used for wind tunnel tests under different attack angles; the six-component measuring balance is used for measuring force through a plurality of force measuring rods arranged between the experiment flat plate and the six-component measuring balance, the force measuring rods are used for transmitting the force borne by the measured empennage in the wind tunnel test to the six-component measuring balance, and the force is measured through the six-component measuring balance; and the upper anti-interference airfoil profile and the lower anti-interference airfoil profile are respectively arranged at two sides of the tested airfoil profile and are used for preventing an induced vortex from being formed on the upper and lower end surfaces of the airfoil profile due to the flow velocity and pressure difference on two sides of the airfoil profile to influence a two-dimensional airfoil profile test result; and the upper anti-interference airfoil profile is fixed through a fixing device located on the side face in the incoming flow direction and used for reducing the influence of the fixing device on the flow field of the test section.

The invention discloses a device for measuring multiple aerodynamic parameters of an outlet section of an air inlet channel. The device comprises a driving motor, a motor bracket, a rotating shaft, a probe mounting arm and a measuring probe. When an air inlet channel wind tunnel test is carried out, the driving motor drives the probe mounting arm to rotate, and aerodynamic parameters on a plurality of circular rings on the section of an outlet of the air inlet channel can be obtained; various parameters including total pressure, rotational flow angle, temperature and dynamic parameters in various states can be obtained by replacing the types of the probes; by arranging different probes in a crossed manner, various parameters can be obtained in one blowing test. The device is simple in structure, easy to implement and small in influence on a measurement flow field; the action of the device can be repeated; the device can obtain abundant test data, can improve the measurement precision of the outlet section of the air inlet channel, and reduces the air inlet channel wind tunnel test cost.

The invention relates to a device and a method for measuring the temperature of the outer wall of a supercritical water-cooled reactor coolant channel inner pipe. The problems of slow response, largemeasurement error and high measurement point arrangement difficulty of a traditional wall surface temperature measurement method are solved. The temperature measuring device comprises a sealing unit and a temperature measuring unit; the sealing unit comprises a guide pipe, a base, a bottom extrusion pad, a sealing pad, a top extrusion pad and an extrusion nut; one end of the guide pipe is fixedlyconnected with the outer wall of a coolant channel outer pipe and is communicated with the coolant channel outer pipe, and the other end of the guide pipe is fixedly connected with the base; the bottom extrusion pad, the sealing pad and the top extrusion pad are sequentially arranged in the base from inside to outside, and are pressed in the base through the extrusion nut; the sealing pad is madeof a nonmetallic elastic sealing material; and the temperature measuring unit comprises at least one thermocouple, one end of the thermocouple is fixed to the outer wall of the coolant channel inner pipe, and the other end of the thermocouple sequentially penetrates through the coolant channel outer pipe, the guide pipe, the base, the bottom extrusion pad, the sealing pad, the top extrusion pad and the extrusion nut and then is led out.

The invention belongs to the technical field of aviation fanjet blower noise measurement, and particularly relates to a stator blade pressure pulsation measuring device. The stator blade pressure pulsation measuring device comprises a blade base, PVDF piezoelectric film sensors, a testing lead and a data collector. The blade base is provided with an upper flanged plate, a lower flanged plate and ablade. A thinned area is arranged on a blade basin and / or a blade back of the blade, and a lead groove is formed in the upper flanged plate. The PVDF piezoelectric film sensor is laid in the thinnedarea. One end of the testing lead penetrates through the lead groove to be connected with the PVDF piezoelectric film sensor on the corresponding side, and the data collector is connected to the otherend of the testing lead through a charge amplifier or a current amplifier. According to the stator blade pressure pulsation measuring device, the blade is easy to mount, the spatial resolution is higher, the influence on the flow field is small, and the array covering area and the number of the sensors capable of being arranged in the space are both superior to an existing measuring system.

The invention belongs to the fields of green marine technology and ocean renewable energy comprehensive utilization and relates to a wave power generation device for a triple-hulled vessel. The wave power generation device comprises a swing plate, a swing shaft, a return torsional spring, a gear transmission device, a ratchet wheel mechanism and an electromagnetic power generator, wherein the swing plate is divided into two parts, i.e., a long and narrow connection section, and a wave-facing area occupying most of area, the connection section is in key joint with the swing shaft, and the return torsional spring is arranged on the swing shaft; and a gear transmission mechanism comprises a bevel gear mechanism and a three-stage acceleration gear mechanism, the tail end of the swing shaft is connected with the bevel gear mechanism, the rotating direction of the swing shaft is changed by the bevel gear mechanism, and then the slow rotating speed of the swing shaft is increased to the rotating speed needed by the electromagnetic power generator via the three-stage acceleration gear mechanism, and the ratchet wheel mechanism is arranged at the output shaft of the three-stage acceleration gear mechanism. The invention also provides an arrangement mode of the device aforementioned. The wave power generation device and the arrangement mode of the device disclosed by the invention are suitable for the triple-hulled vessel, and capable of utilizing seawave energy to the greatest extent.

The invention relates to a multiphase flow test flume system which comprises a main body, a clear water circulating system, a muddy water circulating system, a water inlet system, a control system anda water outlet switching system, wherein a support and a jack are arranged at the bottom of the main body and are fixed on the ground by supporting hinges for adjusting the width and the gradient ofa flume, and the water inlet system comprises a sampling discharge outlet, a manual valve, a flowmeter and an electromagnetic valve and is connected with the top end of the main body; the control system is arranged at one side of the top end of the main body for controlling all switches, and the water outlet switching system is arranged at one outer side end of a water outlet of the main body andis connected with a clear underground water pool in the clear water circulating system and a muddy underground water pool in the muddy water circulating system. Due to the clear water circulating system and the muddy water circulating system which are independent, the invention reduces test water consumption and test cost and conveniently recycles and treats polluted water samples, and a clear water / muddy water switching device of a water outlet system is easily designed and conveniently operated so as to effectively solve the switching problem among different circulating systems.

The invention discloses a micro-probe ultrasonic wave doppler current meter, composed of a measuring bar and a control terminal. The measuring bar is in signal connection with the control terminal in a wired or wireless mode, and comprises a pipe body, a Y-shaped rack, two micro-probe supports, a pair of ultrasonic sensors, a temperature sensor and a related circuit board, wherein the Y-shaped rack is composed of a rod part and two furcated parts; two micro-probes are fixed to the lower ends of the two furcated parts of the Y-shaped rack respectively and are perpendicular to the furcated parts; the two ultrasonic sensors are installed at the front ends of the two micro-probe supports respectively; the temperature sensor is set at the rear end of one of the micro-probe supports; the pipe body is fixed to the upper end of the Y-shaped rack, and is internally provided with the related circuit board. The measuring bar is provided with the two micro probes, allowing the micro-probe ultrasonic wave doppler current meter to posses the advantages of an ultrasonic wave doppler current mete, and the characteristic of a miniature probe; a probe sensor is tiny; the micro-probe ultrasonic wave doppler current meter can measure the current velocity of a shallow water area, and solve the problem of current measurement in a shallow water area.

The invention discloses a reciprocating type vibration device for reducing soot formation blockage of an SCR denitration catalyst, and a working method thereof, and belongs to the technical field of SCR denitration. In the long-term operation process of the SCR denitration catalyst, the change of a flow field and the existence of a purging blind area in a soot blower easily cause the problem of soot accumulation and blockage on the surface of the catalyst around a reactor and seriously affects the safe and stable operation of a denitration system and a unit. Movable dust-proof nets are arranged in the areas, prone to soot accumulation blockage, of the front wall and the rear wall of the SCR reactor on the upper portion of the catalyst, a driving device is arranged to move up and down, andthe purpose of reducing catalyst soot formation is achieved in combination with dust blowing of the vibration device and the sound wave dust blower. The device is simple in structure, small in influence on the flow field of an existing denitration device, low in investment and operation cost and high in operability, has applicability to the SCR denitration device, can effectively solve the problemthat a catalyst is seriously blocked by accumulated dusts, has good environmental protection benefits and economic benefits and is wide in application prospect.

The invention discloses a distortion generator for testing transient total pressure distortion of an axial flow compressor. The distortion generator comprises a slotting power brake, a plurality of sliding rail blocks, two slotting sliding sheets, a plurality of L-shaped feet and a distortion plate, wherein the slotting power-brake comprises an arc square slot hole, a plurality of threaded blind holes and pin positioning holes; the sliding rail blocks are discretely fixed on the partial threaded blind holes at the two sides of an arc-shaped square slot; one sides of the two slotting sliding sheets are provided with arc square slot opening, the two arc square slot openings are partially or fully overlapped on the arc square slot holes, and two slotting sliding sheets are fitted on the surface of the slotting power-gate and move along a track space formed by the sliding rail blocks; each L-shaped foot is spaced from each other and connected with the threaded blind holes; and the distortion plate is erected on a square slot formed by the arc square slot holes and the arc square slot openings, and the distortion plate is balanced and fixed by the L-shaped feet. The distortion generatorprovided by the invention can instantaneously generate transient distortions with different distortion strengths according to the operating conditions of the compressor, so that the experimental datahas more reference significance.

The invention discloses a coal-fired coupling garbage incineration system which comprises a garbage hopper, a feeder, a crusher, a fluidized bed garbage incinerator, a coal hopper, a coal feeder, a coal mill, a pulverized coal furnace, a flue gas ejector, an air preheater and an air feeder. Garbage is combusted in the fluidized bed garbage incinerator after being treated by the crusher, so that the stability and high efficiency of garbage combustion are ensured; coal is combusted in the pulverized coal furnace after being crushed by the coal mill, and high-temperature flue gas generated by pulverized coal combustion is extracted by the flue gas ejector to the fluidized bed garbage incinerator, so that the combustion temperature in the fluidized bed garbage incinerator is increased; and circulating flue gas exhausted by the fluidized bed garbage incinerator is fed into the pulverized coal furnace, and influences on the pulverized coal furnace is small. The system realizes coupling of the fluidized bed incinerator and the pulverized coal furnace, can improve the stability and efficiency of garbage combustion, makes full use of existing coal-fired power generation equipment, reduces the coal consumption of stored coal and electricity and reduces the investment cost for a newly built garbage incineration power plant.

The invention discloses a vertical axis fluid energy conversion device. The vertical axis fluid energy conversion device includes at least one lift blade and at least one Magnus rotor. A power source drives the Magnus rotor to rotate and the Magnus lift force is produced. The Magnus rotor is connected with a main shaft through a connection component. Consequently, the main shaft is rotated and the lift blade is also revolved. The flow field of the vertical axis fluid energy conversion device is less influenced by the Magnus rotor. The performance of the lift blade is better. The whole efficiency is enhanced. The vertical axis fluid energy conversion device is self-starting through the Magnus rotor. The power source only drives the Magnus rotor to rotate, but not drive the whole device. Therefore, the vertical axis fluid energy conversion device has advantages of low cost and low energy consumption.

A model rope support system capable of realizing virtual flight in a wind tunnel relates to an aircraft model. It is equipped with an airplane model, a rod-type six-component force balance, a front cone sleeve, a rear cone sleeve, a sleeve and a pole. The airplane model is pulled and suspended by a traction rope. One end of the traction rope is connected to the winch motor assembly through a pulley, and the other end of the traction rope One end is connected with the support rod, which is used to hang and support the aircraft model. The rod-type six-component force balance is arranged in the aircraft model. The rod-type six-component force balance is coaxial with the aircraft model. The front end of the rod-type six-component force balance passes through the Taper sleeve connection, the rear end of the rod-type six-component force balance is connected with the rear cone sleeve through bolts, and the sleeve is fixed on the rear cone sleeve through bolts. There is no contact on the surface of the force component balance, and the aircraft model is locked on the front taper sleeve through bolts. The pole is arranged on the sleeve for tying the traction rope, and the traction rope is connected with the pulley located on the outer base. It is easy to install, has strong versatility, has little influence on the flow field, and is convenient for testing.

The invention provides a support spacer block for a double hook waveform plate of a pressurized water reactor steam generator dryer, and can meet the design requirements of the steam generator dryers. A support spacer block is used for separation of every two waveform plates of the dryer; the support spacer block has a corrugated curved shape matching that of the waveform plate; the peak of the corrugated curve of the support spacer block is provided with a groove; the top of the support spacer block is provided with a top end extending outwardly; and the left and right sides of the bottom of the support spacer block are provided with one stand bar extending outwardly respectively. The support spacer block for the double hook waveform plate of the pressurized water reactor steam generator dryer has small size and good support and hydrophobic properties to ensure that the spacing between the waveform plates achieves the desired value, so that the degree of compression of the waveform plates meets the requirements, and little influence is exerted on flow field inside the dryer. The groove arranged on the middle can help water drainage, so as to satisfy the design requirement of the steam generator dryer.

The invention belongs to the technical field, and discloses a quick-response thermocouple probe. The quick-response thermocouple probe is formed by thermocouple wire poles, a probe pole, a corundum pipe, a thermocouple measuring contact and thermocouple wires, wherein the thermocouple wire poles support the thermocouple wires; the thermocouple wires are straightened through the thermocouple wire poles, and are horizontal-line shaped; the thermocouple measuring contact is located at the middle part; and facing toward the air-flow direction, the exposed thermocouple wires and the thermocouple wire poles are in II-shaped, and the shape can guarantee that the thermocouple fully contacts the flow field and is convenient for exchanging the thermocouple wires. The quick-response thermocouple probe is generally suitable for K-type, T-type and J-type of thermocouples. Compared with a traditional thermocouple probe, the thermocouple probe can select a thermocouple with very small thermal inertia; the thermocouple wires can be fixed in the flow field to be detected through the thermocouple wire poles; the thermocouple probe can measure the high frequency pulsation air-flow temperature; and the thermocouple wires can maintain intensity and rigidity under the high speed air-flow impact, and are not easy to be bent and deformed.

The invention discloses a hot air heat utilization system for an indirect cooling tower. The hot air heat utilization system comprises the indirect cooling tower and an air inlet header; a plurality of air outlets are symmetrically formed in the part above a heat exchange area of the indirect cooling tower, and an annular air extracting box is arranged outside the air outlets and is connected to the outer side of the indirect cooling tower in a sealed mode; an outlet of the annular air extracting box is connected to the air inlet header, and hot air of the indirect cooling tower is conveyed into an air heater by a fan for being heated again after flowing through the air inlet header. According to the hot air heat utilization system, during the low-temperature operation period of a unit, the hot air of the indirect cooling tower is utilized as the air source entering the air heater, and therefore the steam extraction amount of the air heater can be lowered, the operation efficiency of a steam turbine can be improved, the exhaust gas temperature of a boiler can be increased, and blockage and corrosion of an air pre-heater can be reduced; the air extracting box is arranged in an annular mode, and therefore air inletting is stable; during the low-temperature operation period, the coal consumption of power generation can be lowered by 0.5 g / (Kw.h).

The invention discloses a lobe-type backward step structure, a lobe-type concave cavity device and a supplementary combustion chamber. The stepped structure includes several lobe grooves and backward steps interlacedly distributed along the span direction of the wall surface of the solid rocket supernatural ramjet; the lobe-type concave cavity device includes a concave cavity, a forward step, and the lobe-shaped backward step structure; The lobe-type backward step structure is arranged on the concave cavity at one end of the engine internal airflow upstream, and the forward step is arranged on the concave cavity at one end of the engine internal airflow downstream. By adopting the above-mentioned lobe-shaped concave cavity device, the flame can be effectively stabilized, and the mixed combustion of the fuel-rich gas and the incoming air in the supplementary combustion chamber can be enhanced, and at the same time, the simple structure is suitable for the solid rocket scramjet.

The invention relates to the technical field of cooling towers, in particular to a one-tower or multi-tower water distribution scheme for arranging a vertical shaft or a pipeline vertical shaft in a high-position water collection mechanical draft cooling tower, and discloses an in-tower one-well multi-tower water distribution type high-position water collection mechanical draft cooling tower. The tower is provided with a tower body, an air inlet, a top air outlet, a top air draft device, a water distribution system and a high-position water collection device; the air inlet is formed in the lower section of the side wall of the tower body, the top air outlet is formed in the top end of the tower body, the top air draft device is arranged in the top air outlet, and the water distribution system and the high-position water collection device are sequentially arranged at the position, below the top air outlet, in the tower body from top to bottom; and an upper tower vertical shaft is also vertically arranged in the tower body and communicates with the water distribution system. A water distribution vertical shaft and a main water distribution tank are arranged in the weak air area at the far end of the single-side air inlet high-position water collection cooling tower, vertical shaft water tank type water distribution with more uniform water distribution is adopted, uniform water distribution is better guaranteed, and meanwhile the space utilization rate of the weak air area is increased.

The invention belongs to the field of aero-engine tests, and relates to a tail nozzle temperature field visualization device based on binocular vision and an identification method thereof. The tail nozzle temperature field visualization device comprises a cooling probe, a top black background plate, and a processor storing temperature field measurement and tail nozzle recognition post-processing programs, wherein the cooling probe is located at the lower position of the central axis of the engine tail nozzle; a binocular camera is arranged in the cooling probe; the binocular camera has a top view angle along the axial direction of the cooling probe and a side view angle along the radial direction of the cooling probe; the top black background plate is located within the top view angle; theengine tail nozzle is positioned within the side view angle; and the binocular camera of the cooling probe sends a shot image to the processor, so that the image is processed according to a processing program stored in the binocular camera, and a temperature field of the combustion chamber is obtained.

The invention discloses a test device for indoor research of fish cluster effect, which comprises a water tank 1, a fish blocking net, a propeller propulsion group, a motor group, a camera group, a damping grid and a flow separation plate 21, a water guide wall 4 with two open ends is arranged in the water tank 1, and the water tank is divided into a water flow circulation open channel 5 and a simulated river channel 6; the simulated river channel is divided into a test area 11 and an adaptation area 12 by the fish blocking net; the propeller propelling set is installed at the open end of the water tank downstream water guide wall 4 and connected with the motor set. The camera group is positioned right above the simulated river channel test area 11; and the two rectifying grids 18 and 19 and the positions without the rectifying grids are matched with the flow isolating plate together, so that the test area 11 forms a low-flow-speed area 22, a medium-flow-speed area 23 and a high-flow-speed area 24 along the water flow flowing direction. The method has a good simulation effect on the natural river channel, the stress effect on fish schools is greatly reduced, and the continuous swimming speed, the critical swimming speed and the burst swimming speed of the obtained fish schools are closer to the real situation of the natural river channel.

The invention provides a convenient garbage intercepting and cleaning device for the inside of a fish way. The convenient garbage intercepting and cleaning device for the inside of the fish way comprises triangular frame nets and guide tracks which are symmetrically arranged on side walls of the fish way. The convenient garbage intercepting and cleaning device for the inside of the fish way is characterized in that each triangular frame net comprises a galvanized steel pipe frame, each galvanized steel pipe frame is a triangular prism, one surface of each triangular prism is fixed on the corresponding side wall of the fish way by an expansion sleeve, and each triangular prism is in contact with the corresponding guide track. The device is provided with the two symmetric triangular frame nets and manual lifting devices, by automatic selectivity of migration of 'upward moving fishes' and 'floating garbage', the floating garbage can be intercepted and cleared by the triangular frame netson the left side and the right side, and the upward moving fishes can move upwards selectively along a channel formed between the two triangular frame nets in a staggered manner. The convenient garbage intercepting and cleaning device for the inside of the fish way has water permeability, influences to a flow field in the fish way are small, when the garbage is intercepted and cleared, the circumstance that a gate is closed to stop water is avoided, and passing of the fishes is not affected. In addition, the device is simple to manufacture and mount, simple to operate and wide in applicability.

The invention relates to a mass flowmeter. The mass flowmeter comprises two metering tubes, a vibration exciter and two detectors, the metering tubes are arranged in parallel and are identical in structure, each metering tube is symmetrically U-shaped around a longitudinal center and is provided with two straight tube sections, a middle straight tube section and arced tube sections, two ends of each middle straight tube section are vertically connected with the corresponding straight tube sections, the arched tube sections are used for smooth connection with the corresponding straight tube sections and middle straight tube section, the vibration exciter is arranged at the centers of the middle straight tube sections, a coil and a magnetic steel of the vibration exciter are positioned on different metering tubes respectively, the detectors are symmetrically arranged on two sides of the vibration exciter, and a coil and a magnetic steel of each detector are arranged on different metering tubes respectively. When fluid flows through the two metering tubes at identical mass flow, the vibration exciter vibrates the two metering tubes to trigger the Coriolis effect, and the detectors detect vibration signals so as to obtain the mass flow of the fluid. The mass flowmeter has the advantages of high sensitivity, low-pressure loss, easiness in processing and matching and the like.

The invention relates to an online flight test system and a measurement method thereof, belonging to the technical field of fluid measurement. The flexible wall shear stress test node and the flexible pressure test node have strong conformal ability, and are installed on the aircraft by means of attachment. The installation method is simple and easy to implement and has little impact on the flow field of the aircraft; the airborne fluid wall shear stress and The pressure synchronization tester is small in size, light in weight, has a large number of sensors that can be connected, and can be controlled by the aircraft flight control system to start and stop, which conforms to the airborne test conditions of the aircraft in flight; The sudden change of the surface structure at the junction of the wall and the node makes the measurement result accurate. The on-line flight test system and the measurement method for the shear stress and pressure of the fluid wall of the present invention provide data support for analyzing the flow state of the boundary layer and evaluating the aerodynamic safety of the aircraft.