790results about "Fluid dynamics" patented technology

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.

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.

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.

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 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.

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.

A wing designed to pass through a fluid medium is provided, the wing having a plurality of alternating protrusions and valleys along a trailing edge thereof. The described wing uses the plurality of protrusions and valleys to counteract noise that is a function of wind speed and chord length. In an alternative variant, instead of or in addition to cancelling noise, the plurality of protrusions and valleys are adapted to generate or correct noise such that the noise is generated in a desired frequency band. In this variation, the plurality of protrusions and valleys are configured such that the generated noise is in the desired frequency band based at least on a frequency band that repels various types of animals given a specified local wind speed. In another variation, the plurality of protrusions and valleys are adapted to improve the aerodynamic performance of the wings, whether in the context of separate use or with multiple wings working together within the system.

The invention relates to the technical field of stable anti-shake, and discloses a stable anti-shake device for photogrammetry and remote sensing, which comprises an external shell and is characterized in that an anti-shake mechanism is arranged in the external shell and is used for weakening disturbance of the outside to measuring equipment, and a power generation mechanism for supplementing power to the whole device is arranged in the anti-shake mechanism and is used for generating power to the measuring equipment. An anchoring mechanism for stabilizing the whole device is arranged at the bottom of the external shell, and a driving mechanism is fixedly connected to the bottom of the external shell and used for moving the whole device. Under the action of the anti-shake mechanism and under the guidance of the air guide assembly, air spirally accelerates along with the air guide groove to downwards impact the external shell and exerts downward pressure on the external shell when facing external wind power interference, so that the whole device is more stable, meanwhile, the air is guided into the suspension assembly, the holder for supporting the measurement equipment is suspended, and the measurement precision is improved. And the situation that the measurement equipment is influenced by influencing the anti-shake equipment by the outside world is weakened.

The present application relates to a flow equalizing device. The flow equalizing device comprises a pipeline (110) and at least two blades (101), wherein the pipeline (110) is cylindrical and has a central axis, the at least two blades (101) are arranged in the pipeline (110), and the at least two blades (101) are arranged along a helical line around the central axis, such that a fluid in the pipeline (110) can be divided into at least two streams of fluid to flow in a helical direction on the cross section of the pipeline (110). The at least two blades (101) are spaced apart from an inner wall of the pipeline (110) and / or the at least two blades (101) are provided with through holes, thereby forming a gap on the cross section of the pipeline, such that the at least two streams of fluid can circulate through the gap. The flow equalizing device of the present application can uniformly distribute a fluid in a circumferential direction of the pipeline, thereby equalizing flow.

A structure (1) for channelling and directing incident wind is described. The structure includes a hollow pipe (2) having a downstream end (2a) that defines at least one outlet and an upstream end (2b). A rotatably mounted intake (4) is positioned at the upstream end (2b) of the pipe (2) and is adapted to direct incident wind into the pipe.

The invention discloses a thermostatic water mixing valve based on thermal sterilization, and relates to the technical field of water mixing valves, the water mixing valve comprises an anti-convection mechanism, an anti-layering mechanism, a filtering mechanism, a valve body mechanism and a detection mechanism, the anti-convection mechanism is fixedly connected with the valve body mechanism, the anti-layering mechanism is fixedly connected with a valve body, the filtering mechanism is communicated with the valve body mechanism, and the detection mechanism is fixedly connected with the valve body mechanism. The detection mechanism is fixedly connected with the valve body mechanism, the anti-convection mechanism is fixedly connected with the valve body mechanism, cold and hot water convection interference is restrained through a mechanical structure, and it is ensured that the water temperature levels are balanced. The anti-layering mechanism is fixedly connected with the valve body and is structurally provided with a layer uniformizing component used for weakening the density difference of cold water and hot water to cause layering, the uniformity of the outlet water temperature is further guaranteed, the filtering mechanism is used for effectively removing impurity particles in water and preventing blockage and pollution, and the detection mechanism is used for collecting system operation state data. The problems of confused convection, large temperature difference, impurity accumulation, thermal sterilization temperature and the like are effectively solved.

Example systems and methods for using multi-directional baffles in cryogenic fuel tanks are provided. An example cryogenic fuel tank comprises an inner surface defining an interior of the cryogenic fuel tank to hold a fuel and a plurality of baffles including a first baffle, the first baffle including a first member extending along a first plane and a second member extending along a second plane, the first plane different from the second plane, the second member connected to the first member, the plurality of baffles connected to the inner surface.

A vehicle aerodynamic system with dual operating modes to modify downforce across varying speed ranges and driving conditions. The system comprises multiple fans positioned in airflow pathways and deployable skirts that interact with the ground surface. In a first mode, a complete set of skirts creates a fully sealed bounded region under the vehicle with central fans generating maximum downforce at low speeds on smooth surfaces. In a second mode, a subset of skirts (primarily side skirts) modifies the bounded region while all fans operate to provide downforce in dynamic driving conditions with uneven surfaces. The system includes a control mechanism to selectively deploy skirts and operate fans based on driving conditions, optimizing between maximum downforce at low speeds and improved performance over varying terrain at higher speeds.

The invention belongs to the technical field of petroleum storage, and particularly relates to a shockproof storage pressure container for liquefied petroleum gas. Comprising a pressure tank, multiple columns of partition plates are arranged in the pressure tank, and first through holes transversely penetrate through the bottom ends of the partition plates; a blocking assembly is arranged in the partition plate, the output end of the blocking assembly moves in the vertical direction to block the first through hole, the pressure tank is divided into a plurality of compartments used for containing liquefied petroleum gas, and the effect of rapidly separating and containing liquefied petroleum gas fluid is achieved; a floating plate perpendicular to the partition plate is further arranged in the pressure tank, the partition plate penetrates through the floating plate, the floating plate ascends and descends along with the liquid level of the liquefied petroleum gas and is fixed through a limiting assembly to limit shaking of the liquid level, and stable transportation of petroleum is guaranteed.

To provide a moving body capable of improving aerodynamic drag-reduction effect in the moving body including the aerodynamic drag-reduction structure having a concave and convex structure.SOLUTION: A moving body is provided, the moving body 50 having an aerodynamic drag-reduction structure 1 on its surface, in which the aerodynamic drag-reduction structure 1 has a first region having a concave and convex structure and a second region adjacent to the first region, the first region and the second region extend in a band shape in a traveling direction of the moving body, a structure 20 is disposed on at least one of an upper surface or a side surface of the moving body 50, the aerodynamic drag-reduction structure 1 is disposed on the structure 20, and in the aerodynamic drag-reduction structure 1 disposed on the structure 20, height of a convex portion of the concave and convex structure of the first region and width of the first region and width of the second region in a direction intersecting the traveling direction of the moving body 50 are set based on boundary layer thickness at a position of the aerodynamic drag-reduction structure 1.SELECTED DRAWING: Figure 4

The invention relates to the field of filling anti-blocking, and discloses a filling pipeline with an embedded spiral groove and a mine slurry / paste filling anti-blocking process.The filling pipeline with the embedded spiral groove comprises a filling pipeline body, the spiral groove is formed in the inner side of the filling pipeline body, and an anti-blocking mechanism is arranged on the filling pipeline body; the anti-blocking mechanism comprises a power motor, a rotating shaft I, a stirring blade I, a bidirectional lead screw sleeve, a connecting piece, a main plate, a rotating shaft II, a peripheral spiral circular groove, an extrusion piece and a stirring blade II; the output end of the power motor is fixedly connected with the first rotating shaft, the first stirring blades are fixedly installed on the outer side of the first rotating shaft, two bidirectional threads are arranged on the outer side of the first rotating shaft and are in threaded connection with the bidirectional lead screw sleeve, the connecting piece is fixedly connected with the bidirectional lead screw sleeve and the main plate, and the second rotating shaft is rotationally installed on the main plate. The method has the following advantage and effect that the phenomenon that the filling pipeline is blocked can be effectively avoided.

The invention discloses a runner cone and draft tube combined device for reducing pressure pulsation of a draft tube, which belongs to the technical field of large hydroelectric generating set equipment, is arranged on a rotating wheel and comprises a runner cone and a draft tube, a plurality of water diversion blades are arranged on the outer edge of the runner cone; the runner cone is connected with an outlet of the runner crown; the draft tube comprises a straight cone section, a bent elbow section and a diffusion section which are connected in sequence; a plurality of guide plates are arranged on the inner edge of the straight cone section; the small-diameter end of the straight cone section is used for forming a draft tube inlet and is connected with a rotating wheel outlet. According to the runner cone for relieving the pressure pulsation of the draft tube and the draft tube combination device, the problems that in the prior art, running of the draft tube and the runner cone applied to an ultra-large-capacity water turbine causes unstable tail water vortex, and the service life of a rotating wheel is affected can be effectively solved.

The present invention describes a turbulent flow promoting surface, intended to improve the aeration of fluids, namely of water. The equipment of the present invention comprises a surface, which may or may not be the surface of any apparatus used in the aeration of fluids, which comprises promoters (2) that promote turbulent flow of fluid. The promoters (2) comprise a protuberance (2.1) integrating a cavity (2.1.1) and an edge (2.1.2) responsible for dividing the stream of the fluid in two streams, one of which goes into the cavity (2.1.1) through a central opening (2.1.3). In the cavity (2.1.1), fluid is dispersed and pulverized repeatedly, significantly increasing the amount of bubbles formed.

The present invention deals with a mechanical device with wide application in the reduction or elimination of severe slug or plug flow instabilities in horizontal or inclined gas-liquid multiphase flow pipes, which lead to a reduced operating capacity, mechanical risks of rupture due to repetitive efforts, and operational non-viability.

A pressure relief valve that is spring-activated or utilizes a burst disk is described for preventing pipe bursts in a building plumbing system. A control valve system and method for preventing pipe bursts utilizing the pressure relief valve are also described. Also described are spring-activated control valve cartridges and control valve systems utilizing spring-activated control valve cartridges that prevent pipe bursts when installed building plumbing systems. Further described are methods for preventing pipe bursts in building plumbing systems comprising the step of disposing a relief valve or spring-activated cartridge according to the disclosure in a building plumbing system.

The invention discloses a monomer structure and a resistance reduction structure. The monomer structure comprises a monomer structure base body and a groove structure on the monomer structure base body. In the extending direction of the groove structure, the depth of the groove structure is gradually reduced from the center to the two sides, the flow speed of the center area is high, the deep groove can reduce the direct contact area of fluid and the surface of the base body, and friction resistance is reduced; the flow velocity on the two sides is low, the shallow grooves can avoid formation of retention eddy current, local energy loss is reduced, and resistance reduction uniformity in the flowing direction is achieved; the depth of the grooves is gradually reduced from the central groove to the grooves on the two sides in parallel to the extending direction of the groove structure, the central groove plays a main role in diversion, and the deep design can strengthen the'groove effect '; the grooves on the two sides assist in shunting, fluid channeling between the adjacent grooves can be avoided through the shallow design, and the overall flowing stability is improved. The trench structure is optionally a continuous structure or a discontinuous structure.

A laminar flow element including a single-piece layer of sheet stock having a first surface and a second surface opposite the first surface. The layer is an annular flat disk. The first surface includes at least one channel formed by etching. Sidewalls are formed by the at least one channel, the sidewalls having a height sufficient to create a transverse laminar flow.

The invention relates to an outlet elbow assembly (100) for discharging a multiphase flow medium, in particular consisting of water, solids and air, in which the outlet elbow assembly comprises a pipe (101) having a first horizontal pipe section (102) which, in a mounted position, extends along a first centerline (M102) running in a horizontal direction (H), and a second horizontal pipe section (102) which, in a mounted position, extends along a second centerline (M102) running in a horizontal direction (H); a downcomer section (103) adjoining the first horizontal section (102) and extending in the installed position along a downcomer line (F) running downward; and a second horizontal pipe section (104) adjoining the downcomer section (103) and extending in the installed position along a second centerline (M104) running in the horizontal direction (H). In the installed position, the second centerline (M104) lies below the first centerline (M102) and the flow medium is guided through the pipe (101) in the flow direction (A) in the direction of the first centerline (M102), the descending line (F) and the second centerline (M104). The downcomer section (103) and / or the second horizontal section (104) are / is equipped with at least one guide element (105, 307, 406) which is designed and arranged in such a way that the flow medium can be guided substantially in the flow direction (A) and a movement perpendicular to the flow direction (A) is partially suppressed.

A gas turbulation apparatus is provided for delivering various effects by the turbulation of a substance using a turbulation gas flow. The turbulation apparatus has a vacuum chamber having a vacuum opening and a gas inlet through which a turbulation gas may be drawn from an outside of the vacuum chamber into an inside of the vacuum chamber. The application of a vacuum at the vacuum opening is operable to draw turbulation gas into the inside of the vacuum chamber and through a substance provided therein to thereby turbulate the substance.

The invention discloses a marine riser eight-arc cylindrical vortex-induced vibration suppression and power generation device which comprises a marine riser, a protection module, a power transmission module and a power generation module. The protection module comprises a mounting inner pipe and a mounting outer pipe; the mounting outer pipe comprises a middle section with an arc-shaped notch; working cabins are arranged at two ends of the middle section; thrust rods are arrayed on the circumference of the working cabin; an arc-shaped shell is arranged at one end of the thrust rod; the power transmission module comprises a rotating impeller, a fixed rod, a driving straight bevel gear and an eccentric disc; the driving straight bevel gear is meshed with a two-way straight bevel gear; the two-way straight bevel gear is meshed with a driven straight bevel gear; the driven straight bevel gear penetrates through the working cabin and is connected with the eccentric disc; the eccentric disc is connected with a thrust rod through a straight groove connecting rod; the power generation module comprises an arc-shaped piezoelectric plate on an arc-shaped shell, and the arc-shaped shell comprises an upper bottom plate embedded with an upper electrode and a lower bottom plate embedded with a lower electrode; and an electret is arranged on the lower electrode. While ocean current energy is converted into electric energy, vortex-induced vibration of the stand pipe is restrained.

There is provided an airfoil with a plurality of alternating projections and troughs along its trailing edge designed to traverse a fluid medium. The airfoil described uses the plurality of projections and troughs to negate noise, which is a function of wind speed and chord length. In an alternate variation, instead of, or in addition to negating noise, the plurality of projections and troughs instead are adapted to produce or modify noise such that it is generated in a desired frequency band. In this variation, the plurality of projections and troughs are structured such that the generated noise is in the desired frequency band that is based at least on a frequency band that is repulsive to various types of animals given a designated local wind speed. In another variation, the plurality of projections and troughs instead are adapted to improve the aerodynamic performance of the airfoil, either taken alone, or in the context of multiple airfoils working together within a system.

A differential pressure fluid flow meter measures flow of a fluid based upon a differential pressure. An orifice plate (30) is selected from a plurality of orifice plates (30) configured to be positioned between upstream and the downstream taps (10, 12) in the conduit (8). Four evenly spaced circular orifices (22) allow the flow of fluid there through and create the differential pressure which is a function of fluid flow rate. Xdc is a distance in a direction perpendicular to an axis of the conduit (8) from the nearest outer circumference of the circular orifices (22) to a projection of a center of the downstream tap (12) on the flat orifice plate (30). Xed is a distance between outer circumferences of two opposed circular orifices (22). Rb is a ratio of the diameter that locates the centers of the four circular orifices (22) and the interior diameter of the conduit (8). Xdc and Xed are each a function of Rb.

It is provided a fluid flow control device 100 for establishing a controllable fluid communication between an external fluid reservoir 120-122 and a base pipe 102 constituting part of a production string 101, as well as a production string 101 and a method using such a fluid flow control device 100. The fluid flow control device 100 comprises a primary flow path 2 arranged inside a fluid control device housing 8, a secondary flow path 7 and a movable valve element 9 arranged at and / or within the primary flow path 2. A major portion of the length of the secondary flow path 7 extends outside the fluid control device housing 8.