42results about How to "Change flow field" patented technology

The invention discloses a venturi mixer with a diffuser containing a shrinkage cavity. The venturi mixer comprises a flowing pipeline, a gradual shrinking section, a throat part, the diffuser, an outflowing pipeline and an input pipe as well as the multiple groups of shrinkage cavities in the diffuser, wherein each group of shrinkage cavities comprise a fixed shrinkage cavity and an adjustable shrinkage cavity, and each adjustable shrinkage cavity is composed of two core plates; the fixed shrinkage cavities are welded on the inner wall of the diffuser through multiple support frames, and the adjustable shrinkage cavities are embedded into the diffuser; the fixed shrinkage cavities and the adjustable shrinkage cavities are alternately arranged, and a shrinkage cavity adjusting device can adjust the relative positions of the two core plates in each adjustable shrinkage cavity on line. The venturi mixer provided by the invention has the advantages that the disturbance of a mixing fluid in the diffuser of the venturi mixer is effectively strengthened, the mixing efficiency of the venturi mixer is effectively improved, and a non-uniform mixing phenomenon is avoided.

The present invention provides a flow guiding device of a wind power generator set and its control method, and a wind power generating set. The flow guiding device includes a wind guiding screen and a stay cable. The first end of the stay cable is fixed to the tower of the wind power generator set. The second end of the stay cable is fixed to the ground, and the wind guide screen is arranged between two adjacent stay cables to form a guide surface inclined relative to the vertical direction. According to the flow guide device and control method of the wind power generator set and the wind power generator set of the present invention, the flow field around the wind power generator set can be changed, the wind speed actually flowing through the impeller can be increased, and the power generation can be increased.

The invention provides a gas water heater integrated stainless steel heat exchanger which comprises a surrounding frame and multiple heat exchange tubes penetrating the surrounding frame. Water collecting boxes are arranged at the ends of the heat exchange tubes penetrating through the surrounding frame and enable the heat exchange tubes to be connected to form a continuous flowing channel. Elongated parts are arranged in at least one row of heat exchange tubes close to a high-temperature heating region. The water collecting boxes packages the elongated parts in the heat exchange tubes. The surrounding frame, the heat exchange tubes, the water collecting boxes and the elongated parts are assembled and welded to form an integral structure. The integrally-welded stainless steel heat exchanger is simple in structure and processing and small in size, the sealing performance and the corrosion resistance performance are greatly improved, a water flow field in a gas quick water heater tube is changed through the elongated parts, the situation of original uneven water temperature distribution is changed, accordingly scales are decreased, and the service life of the heat exchangers is prolonged.

The invention relates to a fluidized bed reactor for preparing chlorosulfonated polyethylene by a gas-solid method. The fluidized bed reactor comprises a main body of the fluidized bed reactor, wherein the main body of the fluidized bed reactor comprises a straight tube section and a reactor expansion section; the top end of the straight tube section is connected with the bottom end of the reactor expansion section; the inner diameter of the reactor expansion section is larger than that of the straight tube section; a gas premixing chamber is formed at the bottom of the main body of the fluidized bed reactor; a predistribution device is arranged at the bottom of the inner wall of the gas premixing chamber; a plurality of layers of gas distribution plates are arranged between the gas premixing chamber and the main body of the fluidized bed reactor; an ultraviolet lamp glass tube stack formed by annularly arranging a plurality of glass tubes is arranged in the center of the straight tube section, or a plurality of holes are equidistantly and radially formed in the inner wall of the straight tube section along the circumference; and the glass tubes are arranged in the holes. The fluidized bed reactor has the advantages of effectively preventing particles close to the wall surface from being adhered on the wall surface or settled; eliminating dead zones of the whole fluidized bed layer; making reactions more uniform because reaction materials in the bed layer are sufficiently irradiated by ultraviolet.

A ship, comprising: a hull and a bulbous bow located below the bow of the hull, the distance between the highest point of the upper part of the bulbous bow and the baseline is between 11.95m and 12.45m, and at the 20th station of the hull, the bulbous bow The distance from the bottom of the bow to the baseline is between 750mm and 1250mm; at the 6m waterline height of the 20th station of the hull, the distance from the outer edge of the bulbous bow to the center line is between 3100mm and 3600mm; at the 20.5th station of the hull, the bulbous bow The distance from the bottom of the nose bow to the baseline is between 4550mm and 5050mm, and at the 10m waterline height of the 20.5th station of the hull, the distance from the outer edge of the bulbous bow to the center line is between 1350mm and 1850mm. The ship changes the flow field and pressure distribution around the hull by changing the bulbous bow, so that the ship can have lower effective power at various speeds, thereby achieving the purpose of saving fuel.

The invention discloses a simulating device for acoustic closed end inlet boundary conditions of a fluid flow system and relates to the field of simulating devices for acoustic closed end inlet boundary conditions. The simulating device comprises a recession cone, a throttle pipe, a diverging cone and a porous diffuser grid, wherein the throttle pipe is of a hollow cylindrical structure; the recession cone and the diverging cone are both in hollow conical structures; the recession cone is fixedly arranged at one axial end of the throttle pipe along the axial direction; in addition, the axialminor-diameter end of the recession cone is fixedly connected with the throttle pipe; the diverging cone is fixedly arranged at the other axial end of the throttle pipe along the axial direction; theaxial minor-diameter end of the diverging cone is fixedly connected with the throttle pipe; the porous diffuser grid is horizontally and fixedly arranged on the major-diameter end face of the diverging cone; besides, the porous diverging cone covers a through hole opening of the diverging cone; the major-diameter end of the recession cone is an inlet section; and the major-diameter end of the diverging cone is an outlet end. According to the simulating device disclosed by the invention, the problems that a traditional structure for simulating the acoustic closed end has over-great flow resistance and is seriously corroded are solved.