35 results about "Hydrodynamic resistance" patented technology

The floating breakwater includes various different embodiments, as can have an anchored or moored float. The float is desirably in the geometric form of a generally rectangular solid configuration, but can include other forms. One or more baffles or skirt walls extend from the bottom surface of the float, thereby attenuating subsurface wave action to a greater depth than the bottom of the float. Each of the baffles or skirt walls desirably includes a thin, flat, monolithic plate member for enhancing hydrodynamic resistance. The one or more baffles or skirt walls can be continuous and unbroken, or can have a plurality of apertures therethrough. When three or more baffles or skirt walls are provided they can be evenly spaced, or the spacing therebetween can vary. When two or more baffles or skirt walls are provided they can have equal depths, or their depths can differ from one another.

In order to be able to stably manufacture a fluid resistance device having the same resistance characteristics while preventing fluid such as gas from leaking, a fluid resistance device is provided with a fluid resistance element having a resistance flow passage, a base member and a fixing member for holding the fluid resistance element to be fixed between the base member and the fixing member, and a thin plate-shaped seal member interposed between the fixing member and the fluid resistance element.

The invention concerns the production of filter materials for the purification and disinfection of water, water solutions and other liquids, as well as for sterilizing filtration of injections and other solutions, for concentration of biomolecules in physiological liquids, concentration and extraction of viruses, preparation of apyrogenic water, in biocatalytic diaphragm reactors. The invention solves the problems of a new filter material production, characterized by high sorption properties, high retention efficiency of submicron electronegative particles, microorganisms, submicron non-polar particles and chemical contaminations, and, at the same time, characterized by low hydrodynamic resistance. A base of filter material is the nonwoven organic synthetic polymeric fabric, modified by the aluminum hydroxide particles, fixed to the surface of base fibers for improvement of its sorption properties and for making it positively charged. A method of filter material production comprises: applying the modifying composition onto the fibrous base in the form of organic nonwoven synthetic polymeric fabric, wherein said modifying composition comprises the particles of the aluminum-based material, hydrolysis thereof results to formation and fixation of the aluminum hydroxide particles to the base fibers. A method of fluid filtration is carried out using the filter material as a non-woven organic synthetic polymeric fabric, to the fibers of which the aluminum hydroxide particles are fixed.

The pipeline leak detector travels through a pipeline passively due to the flow of liquid through the pipeline. The device includes leading and trailing rings shaped to produce hydrodynamic resistance in order for the device to be carried through the pipeline. Wheels are provided about each ring, with at least one wheel having an odometer to measure distance traveled through the pipe. The rings are joined by a plurality of axially oriented connecting rods. A plurality of sensing elements extend between the rings. Each sensing element has a thin laminate of a piezoelectric film sandwiched between two electrically conductive layers, with an electrically insulating coating on the outside of each conductive layer. One of the rings includes microelectronic circuitry for data acquisition and storage.

This invention relates to a design of a ship hull, and more particularly, to cargo ship or submarine configurations featuring flow channels on the hull surfaces, and multihull structure, and improved diving and surfacing properties, and reduced hydrodynamic resistance, and improved hull damage resistance, and further comprising underwater hub cargo loading and unloading, and relates to manned or unmanned or semi-autonomous sea vessels. A hull design consists of a curvative hull form transversally and symmetrical about its center line CL and design water line, and consists of ballast and storage tanks and cargo compartment within the hull portions and operable to adjust the draft and the depth of the vessel according to the loaded weight, and provides detachable installation options. The invention relates to a ship hull design with reduced block coefficient (Cb) values.

The present invention provides a pressure-type flow meter and a fluid control device, the pressure-type flow meter comprising: a fluid resistance element (FR) provided in a flow path (L) through which a fluid flows, the fluid resistance element (FR) having a resistance flow path (RL) formed therein, the resistance flow path (RL) communicating with the flow path (L); an upstream-side pressure sensor (PS1) that detects the upstream-side pressure of the fluid resistance element (FR); and a downstream-side pressure sensor (PS2) that detects the downstream-side pressure of the fluid resistance element (FR), the fluid resistance element (FR) is sandwiched and fixed by a pair of sandwiching members (41, 42), sheet-like sealing members (51, 52) are provided between the fluid resistance element (FR) and the sandwiching members (41, 42), and protrusions (61, 62) that partially press the sealing members (51, 52) are formed on at least one of the fluid resistance element (FR) and the sandwiching members (41, 42).

The invention relates to a numerical simulation method of hydrodynamic resistance torque when in opening and closing of a straight gate of a navigation lock, belonging to the technical field of navigation lock hydraulics. Based on an FLUENT fluid computation platform, the opening and closing dynamic process of the straight gate is controlled by virtue of a User-Defined Function (UDF), and numerical simulation of the hydrodynamic resistance torque in the opening and closing dynamic process of the straight gate is realized through establishing a three-dimensional mathematical model of the straight gate of the navigation lock, a gate chamber region and a lock chamber. The numerical simulation method proposed by the invention has the advantages that the accuracy is good, the possibility of fast and conveniently acquiring the hydrodynamic resistance torque when in opening and closing of the straight gate of the navigation lock can be provided, the numerical simulation method can be applied to determination of the hydrodynamic resistance torque of the straight gate of the navigation lock, determination of opening and closing force, design of capacity of a hoist, optimization of boundary conditions of a gate chamber, and the like, and the problems existing in test and study means of a physical model of time and energy waste, and the like can be solved.