1446results about "Fluid dynamics" patented technology

A flow control device having: a composition gradient defining a first coefficient of thermal expansion and a second coefficient of thermal expansion that differs from the first coefficient of thermal expansion; and a thermoelectric junction operationally coupled to the composition gradient, wherein the composition gradient is formed of either of a plurality of dissimilar metals or of plastic with fillings or fibers.

The present invention comprises an aerodynamic profile body with an outer flow surface for flow by a fluid, wherein the aerodynamic profile body comprises: - an upper cover layer and a lower cover layer, which form at least part of the outer flow surface and are designed to be flexurally elastic in an end section of the aerodynamic profile body, and - an actuator device with at least one actuator provided in an interior of the aerodynamic profile body, which actuator interacts with at least one of the cover layers in the flexurally elastic end section in such a way that the cross section of the aerodynamic profile body in the flexurally elastic end section can be changed by the at least one actuator, characterized in that - the at least one actuator is fastened with a first actuator end to a first fastening point in the interior and with at least a second actuator end to a second fastening point in the interior, - wherein the second attachment point is arranged transversely to the span of the aerodynamic profile body at a distance from the first attachment point and on an inner side of one of the cover layers in the flexurally elastic end section, and - the at least one actuator is designed such that the linear distance between the first attachment point and the second attachment point can be changed in order to change the cross-section of the aerodynamic profile body.

A component is described with a hollow structure (21) formed in a component material (6a) for guiding fluids (64), wherein the hollow structure (21) defines a longitudinal direction (60) and an inner surface (66). The inner surface (66) is formed, at least in some areas, by a surface structure (68) with a radial dimension relative to the longitudinal direction (60), which includes flow structures (72) that reduce the flow resistance in at least one partial cross-sectional area of ​​the hollow structure (21) towards a fluid (64).

The present application provides a method for generating a micro-scale columnar high-speed acoustic beam in a liquid environment, comprising: a liquid environment; a high-frequency resonator, which generates 0.5-30 GHz ultrasonic waves to act on the liquid environment during operation, generating a directional fluid motion along the direction of propagation of the sound wave in the liquid at the solid-liquid interface, i.e., a columnar focused acoustic beam; the high-frequency resonator is driven to operate in at least one driving cycle with a first power, each driving cycle including a first stage and a second stage, the first stage driving the high-frequency resonator to operate, and the second stage stopping the driving; the magnitude of the first power causes the high-frequency resonator to generate an acoustic beam in the first stage; and the duration of the first stage at the first power is less than the second threshold or the duty cycle of the first stage in one driving cycle is less than the first threshold. Corresponding applications are also provided, such as a method for directional transport of liquids or particles in liquids, and a method for processing target objects.

The utility model provides a vehicle-mounted liquid hydrogen storage tank and a vehicle, and relates to the field of vehicle engineering technology. The vehicle-mounted liquid hydrogen storage tank comprises: a tank body and a spiral rib installed inside the tank body, and the outer ring of the spiral rib is welded to the tank body. Compared with welding multiple baffles separately, the processing efficiency is higher, which is conducive to reducing the production cost of the liquid hydrogen storage tank. The spiral rib can separate the impact of liquid hydrogen, and can also separate the thermal stratification caused by heat leakage, shaking and flashing. The temperature difference of each divided part is small, and then the overall temperature difference is also small, which reduces the degree of thermal stratification to a certain extent, thereby achieving the technical effects of preventing liquid hydrogen from shaking and reducing the degree of thermal stratification.

The utility model belongs to the technical field of ball valves, and particularly relates to a ball body of a ball valve, which comprises a ball body, a flow channel hole for fluid to pass through is arranged in the center of the ball body, one end of the flow channel hole is an inlet end, the other end of the flow channel hole is an outlet end, and a plurality of spiral rifling grooves are arranged on the inner wall of the flow channel hole in an annular array mode. A plurality of groups of defoaming channels are formed in the spiral rifling groove, one end, close to the direction of the inlet end, of each defoaming channel is an inlet, the other end of each defoaming channel is an outlet, the hole diameter of each outlet is smaller than that of each inlet, and the hole diameters of the inlets and the outlets in the groups of defoaming channels from the inlet end to the outlet end tend to be gradually reduced. The shape and the layout of the spiral rifling groove can improve the flowing stability of the fluid, and the defoaming channel shrinks and crushes large bubbles in the fluid step by step to enable the large bubbles to be dissolved in the liquid, so that the detection precision of the metering equipment on the fluid flow is improved, and the quality of subsequent chemical preparations or liquid blending is guaranteed.

A valve system includes at least one spin chamber having an outlet drain configured to allow flow out of the spin chamber. A main spin surface of the at least one spin chamber is defined around the outlet drain. A directional jet system is in fluid communication with the at least one spin chamber. The directional jet system includes a plurality of members each is configured to move between a first position for directing a tangential flow around the drain of the at least one spin chamber and a second position for directing a radial flow toward the drain of the at least one spin chamber.

The utility model provides a movable pressure container. The movable pressure container comprises a cylinder body and a wave-proof assembly. Wherein the cylinder body is provided with a stainless steel coating layer and a carbon steel base layer, and the base layer wraps the outer side of the coating layer. The anti-wave assembly comprises a base plate and an anti-wave plate, one side of the base plate is attached to the inner wall of the base layer, and an avoiding hole for avoiding the base plate is formed in the covering layer, so that the base plate can be connected to the base layer and extends towards the interior of the barrel body. A plug welding through hole is formed in the base plate, and when the base plate is welded to the base layer, welding spots are filled in the plug welding through hole, so that the connection strength between the base plate and the base layer is improved. The wave-proof plate is connected to the base plate and located in the cylinder, so that the wave-proof assembly can be connected to the base layer, and the connection strength between the wave-proof assembly and the cylinder is improved.

The invention discloses a novel alloy industrial anti-scaling device which is characterized in that a first connecting ring is fixedly connected to the end of a first pipeline, a second connecting ring is fixedly connected to the end of a second pipeline, the first connecting ring and the second connecting ring are fixed through fixing bolts, a first embedding ring is fixedly arranged on the inner wall of the first pipeline, and a second embedding ring is fixedly arranged on the inner wall of the second pipeline; the first embedding ring is connected with a fluid director in a clamped mode, the second embedding ring is connected with an anti-scale chip set in a clamped mode, the chips are in a flat plate shape, drilling is not needed, machining is easy, the material utilization rate is high, the chips are evenly distributed according to the circumference, the number of the chips is the same as that of the blades, manufacturing and installation are very easy, and cost is low. The problems that a small round hole is prone to causing dirt blocking of a product, machining is complex, and manufacturing efficiency is low are solved, the size of a single overflowing channel is increased to a large extent, the problem of attached dirt blocking is reduced, and meanwhile the contact treatment effect of an anti-scaling material and water flow is guaranteed.

The invention discloses a transcritical flow self-adaptive multi-stage nested structure drag reduction channel, and relates to the technical field of heat conduction and heat management. In order to overcome the technical defects that in the prior art, in an existing drag reduction and heat exchange strengthening technology, drastic changes of fluid physical properties caused by transcritical phase change in an LNG gasifier are difficult to deal with, and the efficient drag reduction effect is difficult to maintain, the technical scheme is that the drag reduction and heat exchange strengthening device comprises a flowing channel, a multi-stage nested groove structure is arranged on the inner wall of the flowing channel, the groove structure comprises a plurality of gradually-changed grooves formed in the flowing direction, and the width and the depth of the grooves are gradually changed in the flowing direction; the first-stage groove is a macroscopic groove which is processed along the inner wall of the flowing channel; the second-stage groove is formed in the first-stage groove and is a micro-scale groove; and the third-level micro-nano rough structure is arranged on the inner surface of the second-level groove and comprises micro-nano-level bulges and pits. The device is suitable for the work of drag reduction and heat exchange enhancement.

By manipulating the fluid flow in the proximity of an object such as a fuselage, a wing, or the hull of ship, the wave drag associated with this object can be substantially reduced. This can be accomplished by locally changing both the fluid flow velocity and the pressure of the fluid flow.

A conduit system for transporting gas from a gas containing chamber for processing a substrate from which semiconductor devices are formed includes a liner with a spiral vent. The conduit system utilizes a curtain of gas to prevent or reduce deposition of material onto an inner surface of the conduit transporting the gas from the gas containing chamber.

The invention relates to the field of vacuum fluorination, in particular to a vacuum fluorination device which comprises a vacuum box, an air inlet and an air outlet are formed in the vacuum box, an air inlet pipe is installed at the air inlet, extends into the vacuum box and is used for introducing fluorine into the vacuum box, and an air outlet mechanism is installed at the end, located in the vacuum box, of the air inlet pipe. The gas outlet mechanism comprises a conveying assembly and a uniform distribution assembly, the conveying assembly is used for conveying fluorine gas, the uniform distribution assembly is installed on the vacuum box, and the uniform distribution assembly is used for guiding the fluorine gas blown out of the conveying assembly and enabling the fluorine gas to be uniformly distributed in the vacuum box. And the effect of improving the fluorine gas distribution uniformity can be achieved.

A fluid composition which is able to exhibit elastic turbulence while pumped through a flow path which compels changes of direction of flow streamlines and comprise a solution of two or more flexible linear polymers in two categories. The first category has an average molecular weight of at least 10 MegaDaltons and the second category has an average molecular weight in a range from 0.25 to 5 MegaDaltons. The concentration of the first polymer is sufficient to enable elastic turbulence with or without the second category. The concentration of the second category is greater than that of the first. When flowing under low shear towards or away from a chamber where the flow path will induce elastic turbulence, the second category polymer reduces elastic instabilities and consequent pressure drop, thereby reducing pumping energy requirement.

A flow conditioner includes a group of flow conditioning units including a first flow conditioning unit and a second flow conditioning unit. The flow conditioner also includes a mixing space for developing a flow. The mixing space is located between the first and second flow conditioning units. One of the first or second flow conditioning units can include one or more of a shaper or a reducer, and the other of the first or second flow conditioning units can include one or more shapers.

A hybrid cooling tray for a battery pack, the tray having: a base defining a first end and a second end that are lengthwise spaced apart from each other and a first side and a second side that are widthwise spaced apart from each other, and wherein the base defines an inner surface and an outer surface; wherein the inner surface defines a coolant channel having an upstream end configured to receive a coolant flow and a downstream end configured to discharge the coolant flow, wherein the coolant channel defines a first transverse side and a second transverse side that extend between the upstream and downstream ends, and turbulators are disposed within the coolant channel between the upstream and downstream ends and define one or more of projections out of the base and impressions into the base, and wherein: at least two of the turbulators have a differing size, shape, pitch, yaw or roll orientation relative to each other; or a turbulator density per square unit area of the coolant channel differs from the upstream end to the downstream end of the coolant channel.

The invention discloses a guiding type self-cleaning water pump and relates to the technical field of water pumps, the guiding type self-cleaning water pump comprises a water pump shell, an impeller cleaning assembly and a pipeline cleaning assembly.The water flow speed is changed through the gradually-decreased hole diameter of a conical speed change hole, a rapid water flow impact column is formed, and strong impact force is generated; impurities and sediments on the surfaces of the impeller blades and the impeller rear cover disc are impacted and cleaned, so that the impurities cannot stay and be attached to the impeller blades and the impeller rear cover disc, and water scale difficult to remove is prevented from being formed, a water source dispersedly flows into the water pump shell in a flow channel formed by every two adjacent impeller blades, and at the moment, water flow is guided through the flow guide blocks; water flow deflects to the surfaces of the impeller blades, so that impact force is increased, the side faces of the impeller blades are subjected to impact cleaning, the cleaning state of the surfaces of the impeller blades is kept through continuous water flow impact, the automatic cleaning function can reduce regular manual cleaning requirements, tedious manual operation is omitted, and the maintenance cost and labor input are reduced.

The invention provides a flow dividing column and a gas flow control device, the flow dividing column comprises a flow dividing column main body, the flow dividing column main body comprises a plurality of flow dividing sheets stacked along the normal direction, each flow dividing sheet is provided with a plurality of vent grooves arranged side by side, and the vent grooves penetrate through the flow dividing sheets; an accommodating cavity for accommodating the shunting column main body is formed in the frame body; wherein the length of the shunting column is smaller than the distance between a first thin tube through hole and a second thin tube through hole in the base, and the first thin tube through hole and the second thin tube through hole are used for being connected with a capillary tube of a thermal sensor, so that the thermal sensor detects the flow. Due to the short flow dividing column, extra disturbance possibly generated when the airflow enters and leaves the flow dividing column is reduced, and the stability of the airflow and the accuracy of measurement are further improved. In addition, due to the small size, the flow dividing column is easier to disassemble and replace, the maintenance process is simplified, and the maintenance cost is reduced.

The invention provides a solution for inadequate boundary layer testing methods. The invention includes a uniquely configured multi-module concentric loop cycling water past a testing module to obtain real-time values and variables to use in CFD calculations. The invention is comprised of various sections, specifically designed to support the entire system. The system includes: one or more water reservoirs / degassing tanks, high- capacity water pumps, water stream straightener(s), stable flow section, air induction ports, viewing ports, test modules containing test surfaces designed to measure friction and pressure of a passing water or air / water stream. The present invention includes one or more sensors on the test surface(s) that convey conditions to one or more computers that may receive, store, process and send interpretations to one or more visual monitors on or near the invention in real time.

A gas flow conditioner in the flow bend in an ultrasonic flow meter has at least one longitudinal dividing plate provided in an inner space of the flow bend. The flow bend can be provided with an inlet curved section, a middle straight section, and an outlet curved section, wherein axes of the inlet curved section and the outlet curved section are in a parallel direction and connected to a pipe opening of size DN.

The approach to the current problem of plastic deformation on the walls of the transportation truck is the development of a tribodynamic cell. This geometrically manufactured shape is able to reduce the force of more than 60.00% in a truck, more than 80.00% as a unit cell at standard speeds, and 90.00% at sonic range velocities. This reduction signifies an economic savings in fuel, service life of the transportation system, as well as reducing the carbon footprint locally and worldwide. Strategically, the tribodynamic cell embodiments convert the immediate surrounding airflow into a surface capable of lowering friction drastically and achieving supersonic speeds in half the time compared to a surface without the geometrically enhanced approach.

In one example, a fluid flow restrictor has a housing outlet offset from a housing inlet along a fluid flow direction so as to define a channel therebetween. A rotatable body that is disposed in the channel defines a bore that extends entirely therethrough such that the bore defines a bore inlet and a bore outlet. The flow restrictor has an interior surface disposed in the bore that defines an orifice having a cross-sectional dimension that is less than a cross-sectional dimension of the channel such that the orifice can restrict a flow of fluid as the fluid flows between the housing inlet and outlet. The rotatable body is rotatable between 1) a first orientation, where the bore outlet is offset from the bore inlet along the fluid flow direction, and 2) a second orientation, where the bore inlet is offset from the bore outlet along the fluid flow direction.

The invention belongs to the technical field of plastic pipelines, and particularly discloses a high-impact-resistance PVC composite mute pipe which comprises an inner layer, a foaming sound insulation layer, a hollow silencing layer and an outer layer which are sequentially arranged from inside to outside. The inner layer comprises an inner layer body and a plurality of flow guide screw flights, and the flow guide screw flights are distributed in the circumferential direction of the inner circumference of the inner layer body at intervals. A plurality of silencing holes are formed in the front side face of the hollow silencing layer in the circumferential direction. According to the high-impact-resistance PVC composite mute pipe and the preparation method thereof, the high-impact-resistance PVC composite mute pipe has high strength and high and low temperature impact resistance, and a good noise reduction effect can be achieved.

The invention relates to the technical field of pipeline noise elimination, in particular to a pipeline elbow noise reduction device which comprises a connecting elbow, an inner silencer is embedded in a bend of an inner cavity of the connecting elbow, a cavity exists between the inner silencer and the inner wall of the connecting elbow, and a neck bush is arranged between the inner silencer and the inner cavity of the connecting elbow. The inner silencer comprises an inflow part, an inward shrinkage part, a flow guide part and a discharge part which are integrally formed through flexible rubber, the inner diameters of the inflow part, the inward shrinkage part, the flow guide part and the discharge part are smoothly and gradually changed in the flow direction, and the outer wall of the inner silencer and the inner wall of the neck bush are seamlessly attached together. The silencer has the beneficial effects that the gradual change section design of the inner silencer maintains a laminar flow boundary layer through continuous curvature change, and flow separation is effectively reduced; the spiral flow guide fins are used for disassembling macroscopic vortex into micro-scale turbulent flow, so that energy dissipation is accelerated, and medium-high frequency noise is improved in a targeted manner; the sound absorption part is filled with an efficient sound absorption material, and a complementary silencing mechanism is formed with flow field optimization.

A system for a tower segment of a tower is presented, wherein the tower segment is configured for forming at least partially a part of a tower for carrying a structure, in particular for supporting a nacelle of a horizontal-axis wind turbine or a machine house of a vertical-axis wind turbine. The system is configured to be attached, arranged, and / or mounted to the tower segment and comprises at least an airflow manipulation arrangement and a support arrangement. The airflow manipulation arrangement includes an airflow manipulator which is configured for affecting an airflow around the tower segment. The support arrangement is configured for supporting the airflow manipulation arrangement and for mounting the airflow manipulation arrangement to the tower segment. The airflow manipulation arrangement and the support arrangement are configured such, when mounted to the tower segment, that the airflow manipulator projects a tower diameter in radial direction by at least 5%, in particular at least 10%, preferred at least 15%, in particular not more than 30%, further in particular not more than 20%, of the tower diameter, or that the airflow manipulator is essentially parallel to the tower segment. By this, an effective measure against vortex shedding effects is put in place.

An assembly for connecting a tube having a tube connector and a flow restricting orifice. The flow restricting orifice includes a tubular nozzle having an insert portion for insertion into a mouth of the tube connector and a visible marking having a marking element which extends radially outwardly from the tubular nozzle and which includes a frangible connection which is connected to the tubular nozzle and which has at least one predetermined breaking point. The frangible connection is configured to release the marking element when the frangible connection is broken before the tube is completely pushed onto the tube connector. The marking element is configured to be retained on the tube connector or on a tube connected to the tube connector to remain, wherein the flow restricting orifice is fitted in a mouth of the tube connector.

The utility model provides a vortex ring generation device, which comprises a top wall, a vortex ring, a vortex ring, a vortex ring and a vortex ring, the side wall is arranged around one side of the top wall so as to form a gas cavity together with the top wall; a first air inlet is formed in the side wall, and the first air inlet is communicated with the first through hole through the air cavity; the siphon baffle is contained in the gas cavity, the siphon baffle is arranged around the first through hole to form an acceleration cavity, and the hole diameter of the acceleration cavity is increased along with the distance from the first through hole. The vortex ring generating device provided by the embodiment of the utility model is simple in structure and beneficial to reducing the pressure of an air source. The utility model further provides a liquid container comprising the vortex ring generating device.

A Venturi device with a primary flow path and a secondary flow path introduced into the primary flow path, wherein a flow of one or more flowable mediums in the primary flow path and the secondary flow path creates a vortex generating a suction at an inlet of the Venturi device. A particulate burner system can be used to combust fuel emission byproducts by injecting fuel and air into a housing having a bottom plate with a round bottom opening for burners to inject fuel into a combustion chamber and a top plate with a round top opening for exhausting fuel emissions. A thruster system can be used to propel munition for deep earth penetration by using a thruster system having a transfer cone connected to a munition body.

Systems for processing articles are essential for semiconductor fabrication. These systems employ a variety of apparatuses for controlling flow. In one implementation, an apparatus for controlling flow may utilize a body having a flow path extending from an inlet to an outlet. A valve, a flow restrictor, and a pressure sensor are operably coupled to the flow path. The valve incorporates first and second actuators which enable control of mass flow rates of fluid flowing through the flow path.

A clampless synthetic jet actuator includes a cavity layer having an internal cavity for reception of a fluid volume and an orifice providing a fluid communication between the cavity and an external atmosphere; and an oscillatory membrane having a piezoelectric material adapted to deflect the oscillatory membrane in response to an electrical signal. The cavity has an opening in at least one planar surface of the cavity layer, and the cavity layer and the oscillatory membrane are joined by a high strength, low shear modulus adhesive material with the oscillatory membrane positioned adjacent to the planar surface having the cavity opening and adapted as an enclosing surface to said cavity opening. The oscillatory membrane is adapted to compress and expand a volume within the cavity, based on a deflection generated by the piezoelectric material, for generating a fluid flow between the cavity and the external atmosphere through the orifice.