67 results about "Compressible fluid flow" patented technology

The seabed imaging sonar comprises a receiving transduction module, the receiving transduction module comprises a receiving plate, an annular sealing block, a socket and a front cover, a first mounting opening is formed in the middle of the front cover, the annular sealing block is arranged at the edge of the first mounting opening, and the receiving plate is arranged at the first mounting opening; the annular sealing block is at least partially attached to the inner side face and the side edge of the receiving plate. The socket is arranged on the inner side face of the receiving plate and located in the middle of the annular sealing block. The shell is internally provided with a pressure balance cavity, the pressure balance cavity is filled with a compressible fluid medium, the side wall of the shell is provided with a second installation opening, the front cover is installed at the second installation opening, and the socket is located in the pressure balance cavity; and the piston assembly comprises a piston cylinder and a piston, the piston is movably arranged in the piston cylinder, and one end of the piston cylinder communicates with the pressure balance cavity so as to allow the compressible fluid medium to enter the piston cylinder.

Provided is a tool bracket capable of tilting a spindle body even when a moment load acting on the spindle body is relatively small. A tool bracket includes: a housing including a cylinder chamber extending along a cylinder axis; a piston urged by compressible fluid toward distal end to reciprocate in the cylinder chamber and having an action portion disposed at distal end; and a tilting body having a tilt axis and disposed in the cylinder chamber in a tiltable manner with respect to the cylinder axis, and includes a centering portion disposed at basal end to abut the action portion, the centering portion presses the piston with the cylinder axis as an action line when the tilt axis is tilted from the cylinder axis.

The invention discloses a fluid-solid-sound coupling calculation method based on time domain analysis of an OpenFOAM platform. The fluid-solid-sound coupling calculation method comprises the following steps: decomposing a compressible fluid variable into an incompressible fluid variable and an acoustic pulsation quantity; deducing an acoustic control equation of a flow sound decomposition method under the dynamic grid; discretizing the acoustic control equation by adopting a finite volume method; applying an incompressible flow field boundary condition and an acoustic boundary condition; adopting an OpenFOAM dynamic grid technology to obtain grid information topological information and motion information; a PISO-SIMPLE merging algorithm is adopted to decouple the acoustic control equation; and solving the decoupled acoustic control equation to obtain sound pressure distribution so as to realize fluid-structure interaction vibration noise characteristic analysis. According to the method, the technologies of variable decomposition, fluid-solid coupling and dynamic grids are utilized, far-field linear hypothesis is avoided, acoustic forecasting of far and near fields is guaranteed, meanwhile, the calculation cost is saved, and the analysis efficiency is improved.

The present disclosure relates to systems, devices, and methods for automated fluid transfer. In an embodiment, the present disclosure relates to a system for fluid transfer between a fluid device and a cartridge for cell processing. The system comprises a first portion comprising an instrument head coupled to a gantry, the instrument head comprising a pneumatic actuator, a peristaltic pump, and a gripping feature for receiving the fluid device. The peristaltic pump may be configured to engage compressible fluidic tubing of a fluid pump module of the fluid device to transfer the fluid between the fluid device and the cartridge. The system further comprises a second portion comprising a docking station for receiving the cartridge. In some variations, movement of the pneumatic actuator relative to the fluid pump module causes occlusion of the compressible fluidic tubing of the fluid pump module by the peristaltic pump.

A seat post assembly for a bicycle includes a first tube having a first distal end and a second tube having a second distal end. A distance between the first distal end of the first tube and the second distal end of the second tube is at a maximum when the first tube is in a first position relative to the second tube. The seat post assembly also includes a first chamber and a second chamber that are fluidly coupleable. The first chamber is a positive fluid chamber, and the second chamber is a negative fluid chamber. The seat post assembly includes a fluid volume disposed in the first chamber and the second chamber. The fluid volume includes a compressible fluid. The first chamber is configured to act as a spring configured to bias the first tube towards the first position relative to the second tube.

The invention provides a compressible fluid D3Q19 model calculation method and device based on a multi-core architecture, a medium and a product, an SOC chip architecture used for calculation is divided into a three-dimensional multi-logic operation core structure, each logic operation core carries out calculation of a D3Q19 lattice Boltzmann model according to corresponding processing data, and after each logic operation core completes calculation, a D3Q19 lattice Boltzmann model is obtained. Migration and collision operations of data between logic operation cores are carried out; obtaining result data according to the migration and collision operations; and iteratively executing until the result data of the required moment is obtained. The problem of simulation calculation of the D3Q19 lattice Boltzmann model on the flow of the compressible fluid is solved, the calculation process is accelerated, the data transmission efficiency is improved, and the overall operation performance is optimized.

This disclosure presents a method for dispensing compressible fluids, specifically natural gas, using a heat exchanger to optimize temperature and pressure conditions. The process involves receiving a first supply stream at an initial temperature and expanding a second supply stream to a lower pressure. Heat is exchanged between these streams within the heat exchanger, reducing the temperature of the first stream for efficient dispensing. This method is particularly suited for filling compressed natural gas (CNG) tanks, ensuring continuous operation without interruptions. The system maintains the first stream's pressure below 4,500 psig and achieves a target density based on reference conditions. Additionally, the method supports integration with natural gas pipelines, maintaining suitable discharge temperatures. The approach enhances energy efficiency by eliminating the need for auxiliary refrigeration, making it ideal for onsite wellhead applications. This innovative system offers a streamlined solution for CNG operations, promoting economic and environmental benefits.

This application relates to the technical field of ship drainage, and discloses a test device for measuring the drainage capacity of compressible fluids, including a first simulation chamber, a second simulation chamber, a power chamber, and a flow monitoring mechanism; the first simulation chamber has a first chamber with high-pressure air therein; the second simulation chamber has a second chamber filled with water, and the second chamber is selectively connected to the first chamber through a first pipeline; a first storage chamber for storing compressible fluids is provided in the power chamber, and the first storage chamber is selectively connected to the second chamber; the flow monitoring mechanism is arranged on the first pipeline, and the flow monitoring mechanism is adapted to detect the amount of water flowing from the second chamber into the first chamber when the compressible fluids in the first storage chamber continuously enter the second chamber. The test device for measuring the drainage capacity of compressible fluids in this application improves the accuracy.

The present invention discloses a method for simulating weakly compressible fluid smooth particles based on particle position correction, comprising the following steps: 1. Smooth particle modeling of weakly compressible fluid; 2. Smooth particle position correction; 3. Using a computer to input the corrected position vector of the i-th particle, and using a position-based Verlet algorithm to perform time iteration on each particle in the SPH particle model to obtain an updated particle flow field distribution; and 4. Obtaining fluid state parameters from the updated particle flow field distribution. The method of the present invention has simple steps and a reasonable design. By correcting the position of fluid particles, a uniform distribution of simulated particles is achieved without introducing physical parameters, resulting in better applicability to complex flows and improved stability and accuracy of subsequent simulation calculations.

The invention provides a rotor for a peristaltic pump, the rotor comprising a body for rotation about an axis, the body having a first side and a second side, the body supporting a plurality of spaced first rollers extending from the body on the first side, the first rollers positioned at a first common radius from the axis, the body further supporting a plurality of spaced second rollers extending from the body on the second side, the second rollers positioned at a second common radius from the axis. The invention extends to a peristaltic pumping unit comprising such a rotor assembled with a first stator and a second stator, the first stator having one or more compressible fluid channels arranged to be compressed by said first rollers and the second stator having one or more compressible fluid channels arranged to be compressed by said second rollers. The invention also concerns a stator for a peristaltic pump, having a body with a planar surface and two or more fluid channels, each fluid channel having a compressible arcuate portion on or in the planar surface of the stator, the arcuate portions arranged to be compressed by a plurality of rollers mounted on a rotor, the arcuate portions each connecting to further portions of the fluid channel extending in a direction away from the planar surface such that the fluid channels take a three dimensional path within the body of the stator.

The present disclosure relates to technology for treatment of a sealed medical material. An aspect of the present disclosure relates to a method comprising the steps of: providing at least one sealed flexible enclosure containing at least the medical material and a polar liquid; wherein the flexible enclosure is made of a sterilization-resistant and non-microwave absorbent material; placing the sealed flexible enclosure in a sealed pressure vessel; wherein the pressure vessel comprises a means for generating microwaves and a means for introducing a compressible fluid; and, applying microwaves to heat the polar liquid in the sealed flexible enclosure, thereby sterilizing or decontaminating the medical material, while simultaneously introducing the compressible fluid into the pressure vessel to apply counterpressure to the sealed flexible enclosure, thereby controlling an internal expansion of the flexible enclosure and preventing material failure.

A system includes storage devices that deliver compressible fluid to a demand and a flow line network extending between and fluidly connecting the plurality of storage devices and the demand. The system further includes stoppage valves and flow control valves in fluid communication with the flow line network and a plurality of heaters in thermal communication with the flow line network. The stoppage valves fluidly connect the storage devices in a series arranged sequentially from a highest-pressure storage device to a lowest-pressure storage device, fluidly disconnect one or more storage devices from the series, and fluidly connect one or more additional storage devices to the series. The flow control valves control a flow rate of compressible fluid delivered from each storage device. The heaters increase a temperature of the compressible fluid delivered from each storage device.

The application discloses a mass flowmeter pipe diameter selection method, device, equipment, medium and program product, and relates to the technical field of fluid metering. The method comprises the following steps: calculating the working condition density and the gas sound speed of the compressible fluid according to the working condition parameters of the compressible fluid; calculating the theoretical minimum pipe diameter that meets the maximum mass flow and meets the flow speed constraint according to the maximum mass flow contained in the flow range, the working condition density, the gas sound speed and the flow speed threshold contained in the flow speed constraint; screening a candidate pipe diameter set greater than or equal to the theoretical minimum pipe diameter in a standard pipe diameter database; for a single candidate pipe diameter, comprehensively evaluating the precision error, the pressure loss and the aerodynamic noise to obtain the comprehensive score of the candidate pipe diameter; and screening the target pipe diameter of the mass flowmeter from the candidate pipe diameters according to the comprehensive scores of the candidate pipe diameters. The technical scheme of the embodiment of the application improves the rationality of the coriolis mass flowmeter pipe diameter of the compressible fluid and the precision of the coriolis mass flowmeter.

A force-measuring device suitable for measuring the wave impact force on a floating photovoltaic buoy in a laboratory setting, relating to the field of marine photovoltaic power generation technology. It includes a perforated cover, stress ropes, plastic baffles, an elastic membrane structure, stress rope connection points, a vent valve, compressible fluid, and a fluid pressure sensor. The elastic membrane structure is semi-cylindrical, with its two semi-circular bases and rectangular face bonded to the plastic baffles and further reinforced by stress ropes. One side of the semi-circular bases on the two sides of the elastic membrane structure has a perforated cover, and the other side has a vent valve. The interior of the elastic membrane structure contains compressible fluid and includes a fluid pressure sensor for measuring pressure changes in the compressible fluid and transmitting the data to an external data acquisition device. The force-measuring device is connected to the photovoltaic buoy via stress ropes and reflects the average pressure generated by the wave force on the buoy by outputting changes in the internal fluid pressure.

A fluid spring mass damper for a motor vehicle may include a housing to be mounted to the vehicle and defining a cavity therein with opposed ends sealing the cavity, a damper mass received within and movable along the cavity, a first compressible fluid disposed within the cavity between the mass and one of the opposed ends of the housing to form a first fluid spring, and a second compressible fluid disposed within the cavity between the mass and the other of the opposed ends of the housing to form a second fluid spring, and an actuator configured to be responsive to a drive signal to cause the damper mass to move within the cavity against a bias of at least one of the first and second fluid springs so as to cancel or reduce dynamic movement of at least one component of the motor vehicle.

Devices, systems, and methods for supporting the body of user are described. Devices, systems, and methods can employ a plurality of cells where each of the cells within the plurality of cells can comprise a bladder containing air or another compressible fluid supported by a base that forms a fluid-tight seal with the bladder The base and bladder can be constructed and arranged so that the bladder forms a rolling diaphragm portion with the base. The height and / or applied pressure in response to an applied load of such bladder may be adjustable substantially independent of the crosssectional shape and dimensions of the bladder. Each of the cells within the plurality of cells which may be a subset or all of the cells of a given support, can also comprise, or otherwise be operatively associated with its own: pressure sensor, height sensor, or both, and / or controllable inlet / outlet valve(s).

The invention discloses a compressible turbulence frictional resistance decomposition method and device, a medium and equipment. The method comprises the following steps: acquiring an instantaneous variable of a compressible turbulence flow field to be subjected to resistance decomposition; calculating an average value and a pulsation value of a plurality of single variables in the vorticity transport equation based on the instantaneous variables; respectively calculating the spatial derivative value of the average value, the spatial derivative value of the pulsation value and the spatial derivative value of the instantaneous variable of each single variable; according to the average value, the pulsation value and the spatial derivative value of each single variable, calculating the average value and the pulsation value of a plurality of combined variables; performing integral calculation on a plurality of parameters of the vorticity transport equation based on the average value and the pulsation value of the plurality of combined variables; and calculating the contribution value of each parameter to the compressible turbulence friction resistance according to the integral calculation result of each parameter. The device fills the blank of compressible fluid mechanics, can be applied to high lift devices such as vortex generators, and has the advantages of high comprehensiveness, diversity and universality.

A smart back pressure valve includes a valve body having opposing upper and lower ends, and a pressure testing system extending from the lower end of the valve body and including a pressure housing defining an interior at least partially filled with a compressible fluid, a piston axially translatable within the interior and including a piston head, and a piston rod extending distally from the piston head, a motor operatively coupled to the piston rod and operable to drive the piston toward and away from the valve body, and a pressure gauge assembly that monitors a pressure within the interior. As the motor advances within the interior, the compressible fluid is compressed and increases the pressure within the interior. When the pressure gauge assembly reports that the pressure remains stable after a predetermined time interval, that is a positive indication that the valve body properly holds pressure.

This disclosure relates generally to an apparatus and related method for use in a tillage or ground cultivation operation. In one embodiment, an apparatus (5) for coupling with a tyne shank or bar (14) of a tyne or cultivator assembly arranged to be drawn or towable in a direction of travel for use in a tillage or ground cultivation operation is disclosed. In one form, the apparatus (5) is arranged for driving movement of a ground engaging element (10) for use in the tillage or ground cultivation operation. The apparatus (5) comprises an actuator assembly (X) arranged for providing driving movement in substantial alignment with an axis (X) of the apparatus. The actuator assembly (506) may comprise a housing (520) having an open end (525), a movable member (550) operable with the housing and selectively movable along the axis (X) between a first position in which the movable member is in a retracted state relative to the housing, and a second position in which the movable member is in an extended state relative to the housing via the housing's open end. The actuator assembly (506) may further comprise a first chamber (560A) arranged operable substantially concentric the axis between the movable member and the housing; and a second chamber (560B) radially spaced from the first chamber region, and arranged operable between the movable member (550) and the housing (520). The actuator assembly (506) may be configured so that movement of the movable member (550) toward the second position is enabled by way of a non-compressible fluid being caused to be introduced into the first chamber (560A) under pressure, and movement of the movable member (550) toward the first position from at or near the second position is enabled by way of a compressible fluid in the second chamber (560B) being caused to expand same upon removal or reduction of the pressure to which the non-compressible fluid is subject.

The present invention relates to an injector for delivery of a pharmaceutical composition, the injector comprising—a cylinder extending along a longitudinal axis, the cylinder having an inner wall, an outer wall, and an outlet at an outlet end opposite an actuating end, a piston assembly comprising a compressible section between an actuating piston element and a passive piston element, which piston elements abut the inner wall of the cylinder at abutting interfaces thereby sealing the compressible section when the piston assembly is inserted in the cylinder, the compressible section comprising a compressible fluid and a resilient frame linking the actuating piston element to the passive piston element. The injector is suited for pre-filled injectors allowing long term storage of protein based pharmaceutical compositions.

A roller pump comprising a pump head operably connectable to be driven by a pump driver wherein the pump head comprises: a pump stator; the pump rotor is arranged to rotate in the pump stator, the pump rotor comprises one or more rollers, each roller is connected to a corresponding roller block, and the roller blocks can move in the radial direction relative to the central axis of the pump head; the blocking adjusting mechanism is connected to the roller blocks of the rollers, and the blocking adjusting mechanism is operated to move the roller blocks in the radial direction relative to the central axis of the pump head so as to compress and partially block a compressible fluid pipeline arranged in the roller path; and a sensor device configured to measure a pressure applied by the roller block of the at least one roller when the compressible fluid conduit is compressed by the one or more rollers.

To solve the problem that it is difficult to specify a condition for operating sprinkler equipment.SOLUTION: A sprinkler system includes a pipe in which a vacuum or a compressible fluid is present at a pressure different from that of outside air, a closed sprinkler head provided in the pipe, a chamber provided in the pipe, and a detector provided between the pipe and the chamber to detect a flow of the compressible fluid.SELECTED DRAWING: Figure 1

The invention relates to a deep sea sonar, which comprises a shell, a transducer module and an elastic module, the side wall of the shell is provided with a first mounting hole and a second mounting hole, the transducer module is arranged at the first mounting hole, the elastic module is arranged at the second mounting hole, and the transducer module is connected with the elastic module. A pressure balance cavity is defined by the shell, the transducer module and the elastic module, and the pressure balance cavity is filled with a compressible fluid medium; the elastic module comprises a first elastic layer, a rope net and a second elastic layer, the rope net is adhered between the first elastic layer and the second elastic layer, a part of the first elastic layer and a part of the second elastic layer are filled in meshes of the rope net, the rope net comprises a plurality of tensile ropes, and the tensile ropes are connected with the first elastic layer and the second elastic layer. The elongation of the tensile rope is smaller than that of the first elastic layer and that of the second elastic layer.

An aspect of the present invention pertains to a method for determining the volumetric flow rate of a compressible fluid flow flowing through a volume flowmeter having a flow inlet, a wheel downstream of the flow inlet and a constriction downstream of the flow inlet and upstream of the wheel, the compressible fluid flowing through the flow inlet and actuating the wheel. The method comprises measuring the rotational speed of the wheel and determining the permanent pressure loss across the wheel based on the measured rotational speed. The method further comprises measuring the fluid pressure of the compressible fluid flow at the flow inlet and determining whether the compressible fluid flow in the volume flowmeter is in the subsonic or in the supersonic regime based on the determined permanent pressure loss and the measured fluid pressure. The method also comprises measuring the fluid temperature of the compressible fluid flow at the flow inlet and determining the volumetric flow rate of the compressible fluid flow based on the determined permanent pressure loss, the measured fluid pressure, the regime of the compressible fluid flow and the measured fluid temperature. Other aspects of the present invention pertain to volume flowmeter for determining the volumetric flow rate of a compressible fluid flow, a data processing device for controlling a volume flowmeter, a computer program for the controller and a computer-readable medium having stored thereon the computer program.

A fluidic tactile sensor includes a core having an outer surface, channels formed within the core, and an elastic skin disposed over a surface portion of the outer surface. Cells are formed between the surface portion and the elastic skin. Each cell is connected to one of the channels through an opening of the channel on the surface portion. Compressible fluid volumes extend between the elastic skin and the core. Each compressible fluid volume includes a first fluid volume formed inside one of the cells and a second fluid volume formed inside the channel connected to the one of the cells. The first and second fluid volumes contain portions of a continuous compressible fluid medium. A contact force applied to the elastic skin at a location corresponding to a given cell produces a measurable change in a fluid pressure of the continuous compressible fluid medium associated with the given cell.

An acoustic device for achieving a zero static bulk modulus, and a method. The acoustic device may comprise: an acoustic cavity, having a compressible fluid medium therein; a composite plate, arranged to vibratably close an opening on at least one side of the acoustic cavity; and an instability introducing member, coupled to the composite plate, and arranged to provide negative stiffness to the composite plate during vibration of the composite plate, so as to counteract positive stiffness of both the acoustic cavity and the composite plate, thereby achieving a critical state of an acoustic unit, the critical state indicating that a static bulk modulus of the acoustic unit approaches or equals zero.

The present application is directed towards a generator that utilises the properties of a compressible fluid and an incompressible fluid to generate power using a plurality of vessels wherein the vessels are connected in a circuit by a plurality of pipe sections.

A pressure relief valve (1) for a cryogenic fluid system of an aircraft, the pressure relief valve including a valve inlet (6) for connecting the pressure relief valve to a conduit (3) of the compressible fluid system and an intermediate chamber (10) fluidly connected to the valve inlet via a valve aperture (5). The intermediate chamber has a first frustoconical portion centred about a longitudinal axis. The pressure relief valve includes a valve member (2), wherein the valve member has a valve member outlet (8) and at least one channel (12), wherein the at least one channel is arranged to fluidly connect the intermediate chamber to the valve member outlet. The valve member includes a second frustoconical portion centred about the longitudinal axis. The pressure relief valve also includes a biasing member (4) to bias the valve member closed.

The invention provides a ship gas explosion damage assessment method based on a gas-solid coupling model. The method comprises the following steps: constructing a gas explosion numerical calculation model based on a computational fluid mechanics theory, and calculating to obtain the pressure of gas explosion on a ship body; in order to evaluate the damage of the gas explosion to the ship structure, the reflection pressure borne by the ship body is calculated; and based on a near-field dynamics method, constructing a ship damage evaluation numerical calculation model, and evaluating the damage caused by gas explosion to the ship body. According to the method, the fluid dynamic behavior of gas explosion is accurately simulated by utilizing a compressible fluid mechanics theory, the dynamic response of the ship structure is simulated in combination with a near-field dynamics method, and the damage condition of the ship structure under explosion impact can be rapidly and accurately evaluated in a ship gas explosion scene; through combination of related test data and a calculation result of the model, powerful support is provided for ship safety design and accident prevention.