308 results about "Convective flow" patented technology

The multi-field coupling collaborative modeling and parameter autonomous intelligent decision-making method for the roller type quenching process comprises the steps that four key process parameters including the nozzle flow, the water ratio, the roller gap distance and the plate passing speed are collected and subjected to normalization preprocessing, and a training set and a test set are divided; the four key process parameters of the training set serve as input, the water-cooling convective heat transfer coefficient and the phase change plasticity coefficient serve as output, a BP neural network is trained, and the workpiece surface water-cooling convective heat transfer coefficient and the material internal phase change plasticity coefficient are predicted through the trained BP neural network; a multi-field coupling model composed of a temperature field, a structure phase change field and a stress-strain field is solved, and quantitative calculation of quenching core quality indexes is achieved; by taking water consumption minimization as a target, constructing a nonlinear optimization model under the condition that multiple core quality index constraints of the plate temperature, the outlet hardness and the plate shape are met; and performing global optimization on the optimization model by adopting a differential evolution algorithm, and autonomously deciding an optimal process parameter set value.

The invention discloses a soil and groundwater pollution diffusion prediction method and system based on a time-space diagram neural network, and relates to the crossing field of environmental information modeling and artificial intelligence, and the prediction method comprises the following steps: S1, obtaining multi-source soil and groundwater monitoring data and external driving data; s2, generating a static hydraulic communication matrix and a dynamic convection dominant matrix, and constructing a multi-relation dynamic graph structure; s3, performing parallel processing on graph convolution operation of the static hydraulic connection matrix and the dynamic convection dominant adjacency matrix, capturing time dynamic characteristics, and obtaining a pollutant concentration prediction result; and S4, outputting structured prediction data and a visual product. By constructing a multi-relation dynamic graph structure fusing a hydrogeological physical mechanism and a dynamic flow field response, distortion of a pollution plume leading edge deduction trajectory caused by misjudgment of a spatial dependency relation can be avoided, so that the prediction precision of a non-uniform anisotropic pollution diffusion path is improved.

The utility model relates to a plastic part electroplating hanger with good stability. The plastic part electroplating hanger comprises a hanger body, and a hanging elbow is arranged at the top end of the hanger body; clamping structures extending outwards are vertically fixed to the lower portion of the hanging frame at intervals, jet flow structures which are fixed to the hanging frame and open towards the clamping structures are arranged on the inner sides of the clamping structures, the jet flow structures are vertically communicated, a pump flow structure fixed to one side of the hanging frame is arranged at the top end of each jet flow structure, and each pump flow structure comprises a pump machine communicated with the corresponding jet flow structure; the pump machine is fixed to the top end of the hanging frame, one side of a power source of the pump machine is fixed and electrically connected to the hanging elbow, the other side of the pump machine extends upwards to form a power source elbow bent downwards, and a closed loop is formed between the power source elbow and the hanging elbow. According to the electroplating hanging frame, stable convection can be conducted on a workpiece and electroplating liquid, and the effect of the stability of electroplated layer machining is enhanced.

The invention discloses an efficient heat dissipation iron core which specifically comprises an iron core body, an upper yoke part and a lower yoke part, the upper yoke part is arranged at the top of the iron core body, and the lower yoke part is arranged at the bottom of the iron core body; an airflow channel is formed between the two groups of iron core bodies which are adjacently arranged in the first direction; a first gap is formed in the upper yoke part, a second gap is formed in the lower yoke part, and the first gap, the airflow channel and the second gap are communicated and form a heat dissipation air channel. The first gap and the second gap are respectively arranged on the upper yoke part and the lower yoke part, and the first gap and the second gap are respectively communicated with the air flow channel to form the heat dissipation air channel penetrating through the whole iron core, so that the step-by-step heat dissipation of the upper yoke part, the iron core body, the coil and the lower yoke part is realized, the conduction and convection efficiency of internal heat is improved, and the heat dissipation efficiency is improved. And the stable operation of the reactor under the conditions of high power and long-time operation is ensured.

The invention discloses a heat pipe thermophysical property testing device, system and method based on liquid cooling flow equalization, and the device comprises a liquid cooling flow equalization system which is provided with a plurality of parallel and mutually isolated flow channels, and a condensation section of a to-be-tested heat pipe is inserted into a liquid cooling cavity to form forced convection; an upper heating block and a lower heat insulation block of the heating unit clamp and fix an evaporation section of the heat pipe to be tested; the liquid cooling flow equalizing system is arranged on the inclination angle adjusting mechanism; the data acquisition unit comprises temperature sensors which are respectively arranged at liquid inlets and liquid outlets of the flow channels, and at least two temperature sensors which are arranged at a heat insulation section of the heat pipe to be tested; according to the system, a circulating water bath device, a high-pressure constant-flow pump, a filter and a testing device form a closed-loop liquid path. The real heat transfer amount of the heat pipe is inversely calculated through the heat absorption amount of the cooling liquid, the equivalent heat conductivity coefficient and the limit power are obtained by combining the two-point temperature difference of the heat insulation section, multiple heat pipes of different specifications are tested in parallel at a time, and the test efficiency and the data accuracy are improved.

The invention discloses a low-temperature liquid cavitation numerical prediction method considering different-scale heat effects, and belongs to the field of low-temperature liquid cavitation numerical prediction. The implementation method comprises the steps that a corresponding fluid domain geometric model is established, grids are divided, a computational fluid mechanics model is established under the macro-scale, a separation vortex DES turbulence model is adopted, a fluid volume VOF model is used for capturing a macro-scale cavity interface, and convective heat transfer correction under the macro-scale is conducted on a cavitation model; establishing a cavitation kinetic equation considering heat conduction correction under the mesoscale, solving resistance, volume force, additional mass force, pressure gradient force and lift force suffered by the mesoscale discrete cavitation by using a DBM discrete phase model, and obtaining a movement track of the discrete cavitation in a cavitation flow field; and calculating the unsteady cavitation flow by taking a steady result as an initial value to obtain a flow field characteristic under a macroscale and a discrete cavitation dynamic evolution process under a mesoscale, thereby realizing quantitative description and high-precision numerical prediction of the unsteady cavitation flow.

The invention relates to a submarine cable current-carrying capacity calculation method considering the cooperative influence of seawater thermophysical characteristics and ocean current and electronic equipment. The method comprises the following steps: calculating a heat conductivity coefficient of the seawater thermophysical characteristics on the basis of ocean current temperature; the average convective heat transfer coefficient of the submarine cable surface is calculated based on the seawater thermophysical property pair heat conductivity coefficient; based on the contact area between the seawater and the cable, the contact area between the seawater and the sediment, the temperature difference between the seawater layer and the outer surface of the cable, the temperature difference between the sediment layer and the outer surface of the submarine cable and the average convective heat transfer coefficient, calculating convective heat transfer power; calculating the area occupied by seawater in the heat transfer range of the submarine cable based on a preset heat transfer radius, and calculating a seawater heat transfer coefficient and a sediment heat transfer coefficient based on the area occupied by the seawater and the heat conductivity coefficient of the seawater thermophysical characteristics; calculating the resistance per unit length of the submarine cable conductor considering the conductor temperature; and calculating the submarine cable current-carrying capacity based on the convective heat transfer power, the submarine cable body heat transfer coefficient, the seawater heat transfer coefficient and the sediment heat transfer coefficient.

This invention provides an apparatus for heat exchange comprising a plurality of fins, and a heat transfer coil in the form of a plurality of oblong sectional tubes being arranged in a single array. The fins are arranged along a longitudinal portion of the oblong sectional tubes substantially perpendicularly for guiding incoming convective fluid towards all the oblong sectional tubes for heat exchange to be performed thereupon. Furthermore, the oblong sectional tubes of the heat transfer coil each has a substantially rectangular cross-section with round edges, or oval or elliptical cross-section, and are operable to be installed with a tilt angle for them to be tilted with a major axis of the oblong sectional tube being in respect to a direction of the incoming convective fluid flowing through the heat transfer coil. A related system and method involving the apparatus are further described.

The utility model discloses a primary brine preheats high -efficient energy -conserving heater, including the casing, the both ends of casing are provided with the pipe box, is provided with multiple groups of heat exchange pipeline in the casing, be provided with multiple groups of disturbing wheel in the casing, be provided with two groups of support ring on the disturbing wheel, the inner wall connection of support ring and casing, the disturbing wheel rotation is arranged between two groups of support rings, be provided with multiple groups of disturbing vane on the disturbing wheel, and multiple groups disturbing vane are annular array distribution and set up on the disturbing wheel, the utility model discloses beneficial effect is: through being provided with multiple groups rotatable disturbing wheel and its annular array distribution disturbing vane in the casing, under the high temperature fluid flow impact passive rotation, forms the lasting, dynamic disturbance to the casing fluid, and this design effectively destroys the temperature boundary layer and the speed boundary layer of casing fluid, and strengthens the turbulence effect, and promotes high temperature fluid and heat exchange pipeline outer wall surface realizes more sufficient forced convection heat transfer.

[Problem] The present invention addresses the problem of, when brazing a heat exchanger, adherence occurring at a surface at which a stainless steel jig and an aluminum member constituting the heat exchanger come into contact with each other, said adherence resulting in damage to the heat exchanger during removal of the jig, the heat exchanger comprising: a pair of flow path formation parts obtained by providing flow path formation parts formed by layering a plurality of flow path formation units extending in an air flow direction at an interval from each other in a width direction that is a direction orthogonal to the air flow direction; a plurality of heat exchange tubes connecting the pair of flow path formation parts; heat transfer fins disposed between the heat exchange tubes adjacent to each other, on both outer sides of, from among the plurality of the heat exchange tubes layered in the layering direction of the flow path formation units, the heat exchange tubes positioned at both ends in the layering direction; and a pair of side plates respectively covering, from among the heat transfer fins, heat transfer fins positioned at both ends in the layering direction and the pair of flow passage formation parts, from both sides in the layering direction of the flow passage formation units. [Solution] An end portion of the side plates is formed into a shape that fills in a step formed on an end surface of each flow passage formation unit.

This application discloses a liquid pump, including a housing and an air-cooled heat dissipation structure. The housing contains: a pump liquid chamber with an inlet and an outlet; a motor chamber located on one side of the pump liquid chamber; a heat dissipation chamber located on the outer periphery of the motor chamber for heat dissipation; a liquid channel located between the pump liquid chamber and the heat dissipation chamber, with the heat dissipation chamber connected to the pump liquid chamber via the liquid channel; and an air-cooled heat dissipation structure located on one side of the motor chamber for air cooling of both the motor chamber and the heat dissipation chamber. Under pressure differential, the liquid in the pump liquid chamber flows into the heat dissipation chamber through the liquid channel for heat exchange. After heat exchange, the liquid flows back to the pump liquid chamber from the heat dissipation chamber via the liquid channel, causing the liquid to circulate repeatedly from high pressure to low pressure, thus carrying away heat from the heat dissipation chamber. This application eliminates the need for a piping structure, simplifying manufacturing, reducing costs, and decreasing fluid flow resistance. Furthermore, the air-cooled heat dissipation structure accelerates the convective heat exchange rate between the external air and the motor chamber and heat dissipation chamber, further improving the heat dissipation efficiency and performance of the liquid pump.

The present application relates to a heat management system and a battery, comprising a heat exchange assembly and a turbulence assembly, the heat exchange assembly comprising heat exchange components, a plurality of heat exchange flow channels are formed on the heat exchange components, the plurality of heat exchange flow channels are sequentially arranged along a first direction, and the heat exchange flow channels are used to arrange heat exchange medium; the turbulence assembly is arranged in the heat exchange flow channels, the turbulence assembly comprises a plurality of turbulence components, and the plurality of turbulence components are sequentially arranged along a second direction; at least one turbulence unit is arranged on each turbulence component; when the same turbulence component is provided with a plurality of turbulence units, the plurality of turbulence units are sequentially arranged along the first direction, and each turbulence unit is arranged in different heat exchange flow channels; at least one turbulence hole is arranged on each turbulence unit, and when the same turbulence unit is provided with a plurality of turbulence holes, the plurality of turbulence holes are sequentially arranged along the first direction. The present application changes the flow direction and state of the heat exchange medium by arranging the turbulence assembly, improves the efficiency of convective heat exchange, and meets the uniform temperature requirement.

The utility model provides waxberry low-temperature unfreezing flow equalizing equipment, which comprises an unfreezing chamber main body with a box door and a movable multi-layer tray rack capable of being arranged in the unfreezing chamber main body, a forced convection unit is arranged at the top of the unfreezing chamber main body, and a temperature control unit, an air supply pressurizing cavity and an air return negative pressure cavity are arranged in the unfreezing chamber main body. The air supply pressurization cavity and the air return negative pressure cavity are formed in the two opposite side walls in the unfreezing chamber body respectively, an air supply air inlet communicated with the air outlet end of the forced convection unit is formed in the top of the air supply pressurization cavity, and an air return air suction opening communicated with the air suction end of the forced convection unit is formed in the top of the air return negative pressure cavity. A plurality of air outlets facing the interior of the thawing chamber body are formed in the side portion of the air supply pressurizing cavity, the sum of the sectional areas of the air outlets is smaller than the sectional area of the air supply inlet, a plurality of air return openings facing the interior of the thawing chamber body are formed in the side portion of the air return negative pressure cavity, and the sum of the sectional areas of the air return openings is smaller than the sectional area of the air return suction opening. The waxberry thawing device improves waxberry thawing uniformity.

The invention discloses a fuel cell and application thereof, a bipolar plate of the fuel cell comprises a communication structure with a cross-flow channel and a reducing structure, the hydraulic diameter of the reducing structure is smaller than that of a non-reducing structure, the non-reducing structure of the flow channel is provided with the communication structure corresponding to at least one of two adjacent ridges, and further, the non-reducing structure of the flow channel is provided with the communication structure corresponding to at least one ridge. The resistance of the gas in the first direction passing through the reducing structure is R1, the resistance of the gas in the second direction passing through the communicating structure is R2, R1 / R2 is larger than or equal to 20, the first direction is the flowing direction when the gas enters the flow field, and the second direction is perpendicular to the first direction. According to the bipolar plate of the fuel cell, provided by the invention, a larger pressure difference can be formed between the adjacent flow channels by fully utilizing the pressure drop generated by the reducing structure, and the same or higher-level under-ridge gas convection seepage effect can be formed in a gas diffusion layer or a membrane electrode by virtue of a smaller flow field pressure drop; and the purpose of improving the under-ridge mass transfer and drainage performance of the fuel cell is achieved.

The invention relates to a method for measuring the flow velocity of a medium. The method for measuring the flow velocity of the medium comprises the steps that S1, an LCSR method is adopted, a one-dimensional unsteady-state heat transfer model is established with an RTD protection sleeve as a cylinder wall, temperature field change is simulated to obtain quantitative correlation between a convective heat transfer coefficient and the flow velocity of the medium, and LCSR temperature transient response curves at different flow velocities are obtained; s2, converting the equivalent curve into an immersion method equivalent curve through nonlinear fitting, calculating response time meeting nuclear power standards, and collecting multiple groups of medium flow velocity and response time data; s3, based on the data, establishing a correlation between the two; and S4, obtaining the response time of the RTD in the nuclear reactor annular channel, and substituting the response time into the correlation formula to obtain the medium flow velocity. Accurate measurement of the micro flow velocity of the medium in the annular channel of the nuclear reactor can be realized.

This invention discloses a fuel cell and its application. The bipolar plate includes a connecting structure with a cross-flow channel and a narrowing structure. The hydraulic diameter of the narrowing structure is smaller than that of the non-narrowing structure. The non-narrowing structure of the flow channel has a connecting structure corresponding to at least one of two adjacent ridges. Furthermore, the resistance of the gas in the first direction through the narrowing structure is R1, and the resistance in the second direction through the connecting structure is R2, where R1 / R2 ≥ 20. The first direction is the flow direction of the gas entering the flow field, and the second direction is perpendicular to the first direction. Therefore, the fuel cell bipolar plate provided by this invention can more fully utilize the pressure drop generated by the narrowing structure to create a larger pressure difference between adjacent flow channels. This allows a smaller flow field pressure drop to create the same or higher level of under-ridge gas convection and permeation effect within the gas diffusion layer or membrane electrode, thereby improving the under-ridge mass transfer and drainage performance of the fuel cell.

The invention provides a turbulent flow space statistical magnitude measuring method, which comprises the following steps of: acquiring a sampling signal for laser Doppler velocity measurement, processing, setting filtering and pre-signal amplification coefficient parameters, carrying out data enveloping and modulation, checking a calculation result, filtering again if the calculation result is unqualified after the calculation result is checked, and if the calculation result is not qualified after the calculation result is checked, judging whether the calculation result is qualified or not. If the inspection is qualified, outputting a result; determining a laser Doppler measurement volume diameter corresponding to the low-intensity steady turbulence by applying a Taylor freezing hypothesis, and performing Fourier transform by adopting a time slot auto-covariance method to draw a turbulence space kinetic energy spectrum density curve; second-order and third-order structure function curves of a turbulent space are drawn based on a convection recording method and a time slot auto-covariance method to be verified respectively, a turbulent average dissipation value is calculated according to the initial slope of a third-order structure function of the turbulent space, and then the dissipation scale is calculated according to the energy dissipation rate of fluid and the kinematic viscosity coefficient of the fluid. According to the measurement method, the measurement precision of the turbulence space is improved.

The application discloses a high-temperature superconducting conductor and a preparation method thereof, and relates to the technical field of high-temperature superconductivity, wherein the conductor comprises an inner pipe body and an outer pipe body arranged coaxially, a liquid nitrogen convection cooling zone is formed in the inner pipe body, and a vacuum heat insulation cavity is formed between the inner pipe body and the outer pipe body. By forming the liquid nitrogen convection cooling zone in the inner pipe body and the vacuum heat insulation cavity between the inner pipe body and the outer pipe body, the liquid nitrogen can directly soak the superconducting cable for efficient heat exchange, the vacuum heat insulation cavity effectively blocks the radial conduction of environmental heat to the inner pipe body, and the heat load of the refrigeration system is greatly reduced; by electrically connecting the low-temperature end electrode and the superconducting cable and connecting the room-temperature end electrode and the low-temperature end electrode in series to form a loop, the room-temperature end electrode is avoided from directly contacting the superconducting cable, the axial heat leakage along the electrode is reduced, and one end of the liquid nitrogen cooling pipe is communicated with the inner pipe body and the other end of the liquid nitrogen cooling pipe extends to the outside through the outer pipe body, so that the stable supply and the sealing reliability of the liquid nitrogen are ensured.

The present application relates to the technical field of heat dissipation apparatuses, and discloses a heat dissipation apparatus. The heat dissipation apparatus comprises: an apparatus main body, a water inlet, a water outlet, a jet chamber, and a heat dissipation chamber, which are arranged inside the apparatus main body; the jet chamber is provided at a position corresponding to a projection of the water inlet inside the apparatus main body; the water inlet is in communication with the jet chamber; the jet chamber is located between the water inlet and the heat dissipation chamber; an inner wall of the jet chamber is provided with a plurality of circumferentially arrayed jet flow holes; and the jet chamber is configured for introducing a heat dissipation medium, entering through the water inlet, into the heat dissipation chamber by means of the jet flow holes. The present application achieves longitudinal-to-transverse transport of a heat dissipation medium by means of a process in which a heat dissipation medium enters a jet chamber through a water inlet and is then introduced into a heat dissipation chamber. This facilitates uniform fluid distribution of the heat dissipation medium, and fully leverages the heat-removal capability of the heat dissipation medium, thereby improving the overall temperature uniformity of the heat dissipation apparatus and enhancing convective heat transfer capacity.

The invention relates to an inlet section rectification structure for improving intake airflow organization, which comprises an inlet section airflow expansion structure, a rectifier combined with a conical ring and a grating net, and is suitable for flow control mechanisms such as boilers, wind tunnels and the like. The inlet section airflow expansion structure is from narrow to wide, can slow down high-speed airflow in the pipeline and is connected with the pipeline and the boiler; the rectifier comprises an upstream rectifying cone and a downstream rectifying ring, the rectifying cone plays a role in scattering and decelerating the high-speed jet flow, and the rectifying ring is composed of multiple stages of hollow frustum structures with gradually increased diameters and is used for guiding airflow to be uniformly diffused and increasing the airflow uniformity; the grating net further reduces the vortex and adjusts the airflow direction. On one hand, by guiding airflow diffusion, the structure effectively reduces vortexes and flowing dead zones, improves the uniformity of a flow field, and enhances heat exchange and reaction efficiency; and on the other hand, high-speed gas in the pipeline is converted into low-speed gas uniformly distributed in the reactor by the structure, so that the damage of convection impact to subsequent devices is reduced, the influence of carbon deposition and the like is reduced, and the reliability and the working performance of equipment are improved.

The invention relates to a device (1) and a method for convectively cooling hot steel products, in particular hot rolled products (5) in a rolling mill. The device (1) comprises at least one cooling bed which comprises at least one first and at least one second vertically extending cooling bed plane (2, 3), wherein the cooling bed planes (2, 3) are formed by at least one transport device which has at least one vertical conveyor means (4) that is designed to receive a rolled product (5) from a first horizontal conveyor means (6), raise the rolled product via a first vertical conveyor section, and deposit the rolled product on a second horizontal conveyor means (4) via a second vertical conveyor section. The circulating transport device is arranged in a substantially closed housing (7) which comprises means for producing a flow of air and / or gas, as a cooling medium, through the volume enclosed by the housing (7) and means for recovering energy from the air flow and / or gas flow which is guided through the housing and which is loaded with heat of the rolled product.

This invention discloses a lead-bismuth high-heat transfer heat transfer device with rough elements arranged in a rectangular channel in the field of nuclear reaction heat transfer. From the desert side to the oasis side, it includes: a heating component with a rectangular flow channel structure inside, allowing liquid lead-bismuth alloy to pass through and heating the liquid lead-bismuth alloy inside; rough elements are arranged in the rectangular flow channel structure to simulate the actual flow channel environment; a feeding component connected to the feeding end of the heating component; and a discharging component connected to the discharging end of the heating component. The beneficial effects of this invention are: by setting rough elements on the inner wall of the flow channel plate to simulate the flow channel environment where liquid lead-bismuth alloy causes erosion and corrosion in the actual environment, the influence of flow channel roughness on the flow heat transfer characteristics of lead-bismuth alloy can be more accurately assessed. Furthermore, the modular design makes component replacement faster and the experimental efficiency higher.

The invention relates to the technical field of low-temperature liquid cargo storage tanks, and discloses a shielding layer for a low-temperature liquid cargo storage tank and the low-temperature liquid cargo storage tank using the shielding layer. The shielding layer comprises a corrugated plate, a ridge part is formed on the corrugated plate, the ridge part protrudes towards one side of the thickness direction of the corrugated plate, an airflow channel is formed in the ridge part, the ridge part comprises a plurality of continuous sections, the inner wall of at least one section of the ridge part protrudes towards the airflow channel to form a reinforcing part, and the structural strength of the ridge part is enhanced through the reinforcing part. By arranging the reinforcing part protruding towards the airflow channel on the inner wall of the ridge part, the local structural strength and buckling resistance of the ridge part can be effectively enhanced, local narrowing and disturbance can be formed on the airflow channel, the airflow path is prolonged, and the flowing resistance is increased, so that the thermosyphon effect is inhibited while the structural stability is improved, and the service life of the air conditioner is prolonged. And the synergistic effect of structure enhancement and convection prevention is realized.

The invention provides a sound insulation and noise reduction device. The sound insulation and noise reduction device comprises a first barrel and a second barrel, and a first baffle is arranged at one end of the first barrel; the length of an inner cylinder of the first pipe body is smaller than that of an outer cylinder of the first pipe body, and a first fluid channel is formed between the inner cylinder of the first pipe body and the outer cylinder of the first pipe body. The first fluid channel penetrates through the first baffle; a second baffle is arranged at one end of the second barrel, and a second fluid channel is formed in an inner barrel of the second barrel; the second fluid channel penetrates through the second baffle; the inner diameter of the inner cylinder of the first cylinder body is larger than that of the inner cylinder of the second cylinder body. According to the sound insulation and noise reduction device, noise can be reduced through the multiple stages of fluid channels and the baffles, noise transmission is reduced, air can circulate inside and outside the cabinet body through the sound insulation and noise reduction device, heat is taken away through air convection, and meanwhile an air inlet path can be provided for devices needing air in the cabinet body.

The application provides a wastewater treatment device with stirring function, and relates to the technical field of wastewater treatment. The device comprises a shell and a core mixing system arranged in the shell. The core mixing system comprises a center shaft driven by a motor. A horn sleeve for collecting upper fluid is arranged on the upper part of the center shaft. The horn sleeve is connected to a right-angle pipe provided with a closing block through a collecting pipe. A bottom sleeve and a bottom ring provided with diffusion holes are connected to the bottom of an outer cavity. The lower part of the center shaft is also provided with a horn sleeve and is connected to a sleeve pipe through a circulating pipe. The outlet of the sleeve pipe is connected to a top cavity. A top sleeve and a top ring provided with diffusion holes are connected to the top cavity. A impeller, a booster wheel associated with the impeller and used for pressurizing the liquid flow in the right-angle pipe, and a stirring wheel used for destroying the laminar flow are arranged on the center shaft. In operation, forced bidirectional vertical convection is formed through two independent flow channels of upward flow and downward flow. The bidirectional vertical convection is supplemented by pressurized jet flow and anti-laminar flow stirring, so that the rapid and uniform mixing of the reagent in the full reactor depth range is realized.

This invention provides a computational method, system, and computer equipment for fluid-structure interaction heat transfer. Addressing the problem of extremely slow convergence in the later stages of long-tail iterations in existing weakly coupled algorithms, this invention proposes a two-stage decoupling acceleration strategy. The first stage employs a fluid-solid weakly coupled algorithm with an early truncation mechanism: when the global temperature rise has not yet converged, but the convective heat transfer coefficient at the interface reaches a stable convergence state first, the bidirectional fluid-solid iteration is stopped, and the current convective heat transfer coefficient is extracted. The second stage applies this convective heat transfer coefficient as a separate thermal boundary condition to the solid computational domain, stopping the flow field equation calculation and rapidly solving the solid's heat conduction equation in a unidirectional decoupled state until a complete steady state is reached. This invention cleverly utilizes the spatiotemporal differences in the convergence speed of characteristic physical quantities, eliminating redundant iterations without sacrificing engineering accuracy and significantly improving the solution efficiency of heat transfer simulation.

This invention discloses an intelligent temperature control system and method for heavy-duty truck disc brakes, relating to the field of heavy-duty truck braking systems. The control system comprises a brake disc, a micro-vortex tube array, a dual-channel rotary sealing module, a MEMS temperature-wind speed sensing network, a high-speed pressure-flow proportional valve group, and a vehicle domain controller. The MEMS sensing network collects real-time data on the brake disc friction ring temperature and convective wind speed. The domain controller predicts the temperature rise trajectory using a thermo-mechanical coupling model. When the temperature exceeds a threshold, cold-end and hot-end coordinated cooling is initiated. A pulsed airflow from the cold end sweeps tangentially across the friction surface via an air knife to strip away the hot layer, while a micro-airflow from the hot end is injected into the backplate air guide groove to eliminate thermal stress gradients. The flow rates of the two airflows are decoupled and distributed online by the proportional valve based on temperature error. This invention requires no modification to the brake caliper structure, is compatible with ABS / EBS protocols, suppresses heat fade, extends lining life, and improves braking safety margin.

The invention relates to the technical field of stirrers, in particular to a bidirectional convection type particle material stirrer with a dead angle prevention structure, which comprises a mixing conical barrel, a barrel cover is fixedly connected to the top of the mixing conical barrel, a mounting shell is arranged in the mixing conical barrel, and the top end of the mounting shell is rotatably connected to the axis of the barrel cover; rotating shafts are rotationally connected to the two ends of the bottom of the mounting shell, spiral stirring blades are fixedly connected to the surfaces of the rotating shafts, and the two spiral stirring blades are oppositely arranged in the mixing conical barrel; after the particle materials are lifted upwards through the spiral stirring blades, a recess generated by material missing is generated in the center of the mixing conical barrel, and the two strands of upwards-lifted particle materials converge towards the central recess of the materials under the action of gravity, so that the particle materials form all-directional convective circulation of'two-way rising-diffusion-falling 'in the mixing conical barrel; therefore, efficient mixing of the particle materials is realized.

The invention belongs to the technical field of photovoltaic module optimization, and provides a photovoltaic module optimization method based on upper and lower opening and turbulence enhancement and a photovoltaic module, an air inlet hole is formed in a frame at the lower end of the photovoltaic module, an exhaust hole is formed in a frame at the higher end of the photovoltaic module, and a flow guide pier is arranged on the photovoltaic module. The natural ventilation quantity is improved compared with that of a traditional frame through the up-down through holes, and the turbulence intensity of airflow on the lower portion of the assembly is improved through the flow guide piers; meanwhile, the natural convection driving force is determined according to the height difference between the air inlet hole and the exhaust hole, the environment air density, the air temperature in the assembly and the environment temperature; determining the ventilation quantity of the exhaust hole according to the natural convection driving force; the total heat dissipation power is determined according to the ventilation quantity of the exhaust holes and the convective heat transfer coefficient; and the relative sizes of the air inlet holes, the exhaust holes and the flow guide piers are iteratively optimized by taking the maximum total heat dissipation power as a target, so that the heat dissipation effect is ensured.

This invention discloses a method and system for synergistic analysis of pollution discharge and carrying capacity in static water bodies. Based on monitoring data of static water bodies, the method uses fluid dynamics equations to simulate the transport and diffusion behavior of pollutants in the static water body, obtaining the flow velocity field. The monitoring data of pollutant concentrations are input into a neural network model to predict continuous-time pollutant concentration sequences. Specifically, a convection-diffusion response equation is established based on the flow velocity field to construct the loss function of the neural network model. The maximum carrying capacity sequence of the static water body for the pollutants is calculated to quantify the pollution carrying capacity of the static water body. A water quality dynamic balance coefficient is calculated based on the pollutant concentration sequence and the maximum carrying capacity sequence to quantify the synergistic effect of pollution discharge and carrying capacity. This invention proposes the concept of synergistic discharge and carrying capacity for the first time, realizing the comprehensive ecological performance assessment of static water bodies such as lakes and reservoirs, and providing a new quantitative calculation method for the comprehensive water quality evaluation of static water bodies such as lakes.