801 results about "Convective flow" patented technology

The invention discloses a water environment monitoring system and method based on big data analysis, and the system comprises a data collection and processing module which is responsible for collecting and processing original data related to a water environment, and transmits the processed data to a water flow and pollutant diffusion modeling module; and the water flow and pollutant diffusion modeling module is responsible for constructing a hydrodynamic model by utilizing a CFD simulation method based on the processed data, and predicting a pollutant diffusion trend through a convection-diffusion equation. According to the invention, the data analysis and prediction module deeply excavates potential information in acquired data and simulation results through a K-means clustering algorithm and an LSTM algorithm, and realizes accurate prediction of pollutant diffusion and water quality change time series. And the early warning and emergency response module can discover potential water quality pollution events in advance based on the prediction results and the real-time monitoring data, and give out early warning in time, so that the quick response capability of coping with the water quality pollution events is enhanced.

A worm and worm gear pair heat-fluid-solid coupling analysis method comprises the following steps that 1, a heat-fluid-solid coupling simulation analysis model of a worm and worm gear pair is built, and a three-dimensional geometric model is built based on the worm and worm gear meshing principle; 2, parameterized grid division is carried out on the simulation analysis model, a tetrahedral unstructured grid is adopted for a fluid domain, and a worm and worm gear tooth surface area is densified; 3, based on the fluid dynamics theory and an RNG # imgabs0 # turbulence model, establishing an oil-immersed lubricating oil gas two-phase flow transient simulation model, and solving fluid dynamic pressure and a convective heat transfer coefficient through a pressure-speed coupling algorithm; 4, establishing a three-dimensional transient dynamic simulation model based on a solid mechanics theory, combining a temperature-stress coupling field equation, adopting an explicit dynamic algorithm, and iteratively solving thermal deformation and stress strain of the worm and the worm gear through a finite element method; and 5, bidirectionally transmitting the pressure of the fluid domain, the convective heat transfer coefficient and the thermal deformation data of the solid domain through the fluid-solid interface, and carrying out iterative solution until convergence.

The invention discloses a high-heat-dissipation dry-type transformer. The high-heat-dissipation dry-type transformer comprises a transformer body and a supporting bottom block, wherein the supporting bottom block is used for supporting and installing the transformer body; the air guide assembly is detachably installed above the supporting bottom block and used for feeding air into the transformer body so as to accelerate air flowing; the diffusion assembly is arranged on the transformer body and used for diffusing and changing the area and direction of air supplied by the air guide assembly, and the air guide assembly can guide the air output by the air blower into the transformer body to form forced convective circulation; air entering the transformer body diffuses the coverage area range of the air through the diffusion assembly, the heat dissipation capacity of the winding and the iron core is further improved, meanwhile, the vertically-entering air is adjusted to be in a spiral rising state, the standing time of the air flow in the transformer body is prolonged through the centrifugal effect, and the heat dissipation efficiency is improved. Meanwhile, the contact area range with the winding and the iron core is increased, and the heat exchange efficiency is enhanced.

The gradually-expanded printed circuit board type heat exchange inner core comprises a cover plate, a bottom plate, a cold side plate layer and a hot side plate layer, a cold side gradually-expanded channel is of a flow channel structure with the width gradually expanded, and the sectional area of a flow channel dynamically adapts to gas-liquid phase change and volume change. And pressure drop fluctuation and bubble aggregation caused by gas phase expansion are reduced, the shunt channels and the divergent channels are arranged in parallel, an inner wall porous structure is combined, medium distribution uniformity is optimized through graded distribution and surface wettability enhancement, and the flow stability is remarkably improved. The turbulent flow ribs are arranged in the heat exchange channel on the heat side, combination of heterogeneous working media such as supercritical CO2-water and liquid hydrogen-liquid oxygen is supported by destroying a heat boundary layer, inducing turbulent flow and strengthening convective heat exchange and phase change heat transfer, the heat exchanger can improve the heat exchange efficiency while reducing pressure drop, compactness, reliability and wide working condition adaptability are considered, and the heat exchange efficiency is improved. Two-phase flow optimization and efficient heat exchange are achieved, and the extreme heat exchange requirements in the fields of aerospace, new energy and the like are met.

The invention discloses a CO2-oil near-miscible phase pressure acquisition system and method based on convective mixing, and belongs to the field of CO2 oil displacement. The system comprises a high-temperature and high-pressure reaction kettle, a temperature and pressure control system, a gas injection module, a liquid injection module and a monitoring control module. According to the method, the oil phase and the carbon dioxide are induced to form a convective mixing effect by dynamically regulating and controlling the injection flow rate, and when no interface of the system reaches a mutual convective mass transfer state, the system pressure corresponding to a phase interface disappearance critical point is directly recorded as a near-miscible-phase pressure value. The near-miscible pressure value obtained by the method is high in accuracy, the single test time is shortened to 1 hour, the test period is remarkably shortened, near-miscible pressure parameters under different temperature conditions can be measured in a short time, the CO2-oil near-miscible pressure can be measured by simulating a high-temperature and high-pressure environment of a stratum, and the method is suitable for popularization and application. And high-timeliness key phase state data support is provided for unconventional oil and gas reservoir development.

The present invention discloses a method and device for numerical simulation of near-wall single cavitation collapse coupled with boundary motion, comprising: step 1, introducing a physical model of a near-wall single cavitation into a pre-constructed external flow field to obtain a corresponding flow field physical model; step 2, meshing the flow field physical model; setting initial conditions and flow field boundary conditions, and setting a time step that meets the calculation requirements; step 3, setting specific calculation parameters for solving the flow field process, and introducing a fluid volume method to capture the gas-liquid interface; step 4, applying wall vibration in the form of a user-defined function to simulate the cavitation dynamics behavior under vibration impact. The present invention takes into account the influence of wall vibration in the numerical simulation process by coupling boundary motion, and realizes the simulation of the dynamics behavior of near-wall single cavitation under vibration impact conditions. On this basis, the influence of conditions such as vibration frequency on the cavitation collapse process can be further explored, providing theoretical guidance for optimized cavitation suppression design.

A seat can provide improved ventilation to a seat occupant. The seat can have a seat body including a core and an outer cover defining an outer surface of the seat. A flow passage can be defined in the seat body. The flow passage can include an opening defined in the outer cover. The portion of the seat body including the opening can be caused to move away from a seat occupant. Thus, convective cooling can be provided to the seat occupant in a region corresponding to the portion.

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 relates to the technical field of chemical reaction equipment, in particular to a pulse intermittent water vapor bottom blowing coupling mechanical stirring enhanced mixing device which comprises a tank body, a sealing cover is mounted on the top surface of the tank body, a stirring assembly used for stirring the interior of the tank body is mounted on the sealing cover, the stirring assembly extends into the tank body, and the stirring assembly is connected with the tank body. An air outlet head is arranged at the bottom in the tank body, the air outlet head is communicated with a steam generation unit through an air supply pipe, and the steam generation unit is electrically connected with a pulse control unit used for sending variable frequency signals with adjustable pulse frequency to the steam generation unit. The steam injection frequency is controlled through the pulse control unit, the use amount of the steam is reduced, local high temperature generated by the system during continuous injection is avoided, the temperature is more uniform, meanwhile, convection can be further strengthened through nonlinear input, the periodic structure of the system is damaged, and the service life of the system is prolonged. And more chaotic flow regions are formed to enhance mixing and heat transfer efficiency, so that the production efficiency is improved, and the energy loss is reduced.

The invention discloses a multistage dynamic complex excitation solid waste roadbed filler treatment device and method, and relates to the technical field of solid waste resource utilization. The device comprises a pretreatment unit, a metering unit, a mixing unit and a control unit. The pretreatment unit is used for treating carbide slag, silica fume, excavated spoil and EPS particles, so that the problems that aggregates are not refined, oversized particles are not thoroughly removed, the EPS particles are not graded and the like are solved; in the material mixing unit, a first stirring shaft and a second stirring shaft are vertically distributed to form a three-dimensional shear flow field, and a material lifting device forms vertical convective circulation, so that the problem of non-uniform mixing caused by easy floating of EPS particles due to low density can be effectively solved; and the control unit realizes cooperative control of each unit. According to the device and the method, the mixing uniformity of the solid waste roadbed filler can be improved, the strength fluctuation is reduced, the quality requirement of engineering on the roadbed filler is met, and solid waste resource utilization is promoted.

The utility model provides a reaction tank for heat transfer fluid production. The reaction tank comprises a reaction kettle main body, an omnidirectional flow mixing assembly and a convection ring seat, a linear actuator is arranged on the top surface of the reaction kettle main body and drives the omni-directional flow mixing assembly to do lifting motion in the reaction kettle main body. The omni-directional flow mixing assembly comprises a circulating guide cylinder, a driving machine cylinder and a centrifugal impeller, the flow speed of liquid in the circulating guide cylinder is increased through high-speed rotation of the centrifugal impeller, and high-speed conveying and flow mixing stirring of the liquid are achieved. The convection ring seat is positioned at the bottom end of the omnidirectional flow mixing assembly, and liquid convection spraying is performed through a plurality of spraying holes, so that the liquid is fully mixed in the reaction kettle main body, and the stirring uniformity of the liquid is ensured. The liquid mixing device can realize liquid layered mixing in the vertical direction, avoids local uneven mixing, improves the mixing efficiency of heat conduction liquid, and is suitable for efficient stirring of various complex liquids.

The invention provides a heat dissipation structure and a design method thereof, the heat dissipation structure comprises a substrate, a first flow channel and a second flow channel, the first flow channel and the second flow channel are embedded in the substrate, are mutually stacked and are mutually staggered in the extension direction, and the structure parameters of a micro-flow channel grid formed by staggering the first flow channel and the second flow channel are adaptively adjusted. In this way, in the process that the low-temperature cooling working medium rotationally flows between the first flow channel and the second flow channel, the heat exchange area and the convective heat exchange coefficient of the cooling working medium in the heat dissipation structure are increased, and synchronous control over improvement of the heat dissipation efficiency and reduction of the flow resistance of the cooling working medium in the heat dissipation structure is achieved. The invention further provides a heat dissipation structure design method which is used for carrying out optimization design on the structure parameters of the micro-channel grid so as to rapidly and efficiently obtain the target micro-channel heat dissipation structure performance parameters and the corresponding structure parameters, and the design efficiency and the design result accuracy and reliability are improved.

The invention discloses a steady-state boundary convection-dispersion model parameter acquisition method based on a variable separation method, and the method comprises the steps: constructing a convection-dispersion mathematical model under a one-dimensional finite-scale steady-state boundary condition, and carrying out the dimensionless processing of an original mathematical model through a dimensionless factor; secondly, analyzing and solving the new mathematical model after nondimensionalization by adopting a separation variable method, systematically deriving an analytical solution expression of a one-dimensional steady-state boundary convection-dispersion model in combination with a groundwater dynamic theory and a solute transport mechanism, and constructing a standard curve capable of reflecting different permeability parameters and solute transport related parameters; an indoor one-dimensional convection-dispersion test is carried out, water level and solute concentration measured data at different observation points are obtained, and permeability parameters and solute transport related parameters of a test medium are efficiently obtained through wiring. According to the method, the accuracy and adaptability of the convection-dispersion model in the aspect of parameter identification under the limited scale condition are enhanced; and operation is simple, parameter identification quantity is large, and precision is high.

The invention discloses a Laplace transformation-based steady-state boundary driven solute transport model solution and parameter calculation method, which comprises the following steps of: establishing a one-dimensional finite-scale underground water solute transport mathematical model on the basis of an underground water solute transport system; solving the mathematical model by combining groundwater dynamics, a convection-dispersion equation and a Laplacian transformation method, deducing a convection-dispersion test theoretical model under the condition of different Peclet numbers, and obtaining a standard curve for determining a medium permeability coefficient and a hydrodynamic dispersion parameter under the condition of different Peclet numbers; and carrying out a convection-dispersion test, and determining permeability coefficients and hydrodynamic dispersion parameters of the medium under different Peclet numbers by adopting a wiring method. The method has a rigorous mathematical model and strict mathematical theory derivation, perfects related theories and methods for determining the medium permeability coefficient and the hydrodynamic dispersion parameter in the convection-dispersion test under different Peclet numbers, and solves the technical problems existing in application of the convection-dispersion test in a one-dimensional finite scale model.

The invention discloses a grid-adaptive sub-mesoscale hybrid parameterization method and system, and the method comprises the steps: calculating an effective resolution and a frontal scale according to the spatial resolution of an ocean model, carrying out the calibration of a horizontal buoyancy gradient, and calculating an air-sea interface buoyancy flux and a horizontal Akkerman buoyancy flux according to the calibrated horizontal buoyancy gradient; and calculating to obtain expressions of the convective mixing effect and the sub-mesoscale mixing effect, and a vortex viscosity coefficient and a vortex diffusion coefficient of the sub-mesoscale mixing effect. According to the method, the problem that an existing parameterization scheme cannot be applied to a coarse-resolution ocean model at present is solved, and the effect of introducing sub-mesoscale mixing into ocean models with different resolutions is achieved.

The utility model relates to the technical field of air conditioners, particularly provides an air conditioner outdoor unit and an air conditioner, and aims to solve the problem that an existing air conditioner outdoor unit is poor in heat dissipation effect. In order to achieve the purpose, the air conditioner outdoor unit comprises a machine shell, the interior of the machine shell is provided with a partition plate, and the partition plate divides the internal space of the machine shell into a first cavity and a second cavity; the condenser is arranged in the first chamber; the electric control assembly is connected with the partition plate, and one end of the electric control assembly extends into the first cavity and is connected with a radiator; and the partition piece is arranged between the condenser and the radiator. The air flow passing through the radiator can be adjusted from a laminar flow state to a turbulent flow state, so that the convective heat transfer coefficient between the air flow and the radiator is increased, the heat exchange efficiency is enhanced, and stable operation of the electric control assembly is facilitated.

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.

According to the device for reducing the temperature rise of the dry-type hollow high-capacity current-limiting reactor and the design method thereof, a double-layer rainproof device technology and a split type staggered ventilation structure are adopted to realize rainproof and heat dissipation decoupling; according to the invention, heat dissipation is carried out through annular grating ventilation holes in the vertical direction of a top-layer rainproof cap and a middle ventilation net between the top-layer rainproof cap and a bottom-layer rainproof cap, and a coupling simulation technology of a magnetic field-flow field-temperature field of a reactor is utilized to form a correlation between structural parameters of a double-layer rainproof device and a flow rate change rate of fluid in an air passage of an encapsulation chamber; a bidirectional coupling model of a flow field and a temperature field is established, and the synergistic effect of encapsulated radiation and convective heat transfer is solved through a finite element method. Through multi-field coupling simulation and parametric modeling, the problem of collaborative optimization of rainproof device design and electric reactor thermal performance is solved, the equivalent heat dissipation area is increased to 2-3 times that of a single-layer structure, the use amount of wires is reduced by 8-15%, the coil hot-spot temperature rise is reduced to 78K from 88K of a traditional structure, and the reduction amplitude reaches 11.4%.

The invention discloses a device and a method for simulating heat exchange and friction resistance measurement of an aviation high-speed motor under different working conditions, and relates to the field of heat management of high-speed rotating equipment. An additional heating sheet is attached to the outer surface of the inner rotor, and different surface structures are detachably assembled on the outer rotor to form a stator and rotor slit flow channel boundary; cooling liquid forms one-inlet and one-outlet forced convection through the radial through hole of the end cover. The rotating speed larger than or equal to 20,000 rpm, runner pressure drop and temperature data are synchronously collected through an axle load type sensor, and the heat exchange coefficient, the flow resistance coefficient and the friction resistance coefficient are calculated in real time based on energy conservation, a Darcy formula and a torque empirical formula. A real rotor surface structure is reproduced under the condition of high-speed rotation, working medium leakage is restrained through mechanical sealing, and runner blockage caused by centrifugal deformation of the surface structure is prevented through the outer rotor designed in an integrally-formed mode; the obtained convective heat transfer-resistance coefficient-friction resistance coefficient all-parameter curved surface database can guide optimization of the cooling flow channel of the aviation motor.

The air-core reactor with the auxiliary heat dissipation function comprises a reactor body and a heat dissipation assembly, the bottom of the reactor body is installed through multiple sets of supporting columns, and the heat dissipation assembly is located below the reactor body and located among the multiple sets of supporting columns; the heat dissipation assembly comprises a heat dissipation pipe and a storage tank for storing a water source, the heat dissipation pipe is divided into an air inlet part, a cooling part and an air outlet part, an air deflector is arranged on the hollow inner wall of the heat dissipation pipe, the storage tank penetrates through the air deflector, and the air inlet part and the air outlet part form a cooling channel to communicate the air inlet part with the air outlet part; the reactor body is provided with a first air outlet piece and a second air outlet piece, and the air outlet part is connected with the first air outlet piece and the second air outlet piece through an air pump. According to the structure, the air flow path is prolonged through the spiral air guide plate, the air inlet fan forcibly supplies air to increase the air velocity, the water curtain plate and a water circulation system of the storage tank are combined to strengthen heat exchange, and meanwhile the first air outlet piece and the second air outlet piece are matched with the sucking pump to form a vertical convection three-dimensional cooling channel, so that the problems of low heat dissipation efficiency and easy heat accumulation are effectively solved; and the service life of equipment is prolonged.

The invention provides a method for calculating the inner wall temperature based on the condensation heat transfer process of a blast furnace gas pipeline. The method for calculating the temperature of the inner wall based on the condensation heat transfer process of the blast furnace gas pipeline comprises the following steps: S1, calculating the thermal resistance of convective heat transfer between the inner wall of the gas pipeline and blast furnace gas; s2, calculating the thermal resistance of heat conduction between the gas pipe walls; s3, thermal resistance of convective heat transfer from the outside of the gas pipeline to the outer wall of the gas pipeline is calculated; and S4, calculating the corrosion temperature of the inner wall surface of the blast furnace gas pipeline according to the total thermal resistance, the blast furnace gas temperature and the environment temperature. According to the method for calculating the inner wall temperature based on the condensation heat transfer process of the blast furnace gas pipeline, the heat resistance of each part of the blast furnace gas in the heat transfer process is calculated on the basis of the heat convection and heat conduction process, and the scientific and systematic method for calculating the inner wall temperature of the blast furnace gas is established; the corrosion condition of the blast furnace gas pipeline can be conveniently predicted, and the safe operation of the blast furnace gas pipeline can be monitored.

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 a three-dimensional fire modeling method based on a lattice Boltzmann method, and the method comprises the following steps: building a fire model which comprises a calculation module and a self-adaptive mesh refinement module, the calculation module comprises a lattice Boltzmann flow module, a buoyancy driving module, a combustion module based on gradient dynamic triggering, an energy equation module, a flue gas transportation module containing particle sedimentation and visibility calculation, and a multi-component transportation module. According to the fire modeling method based on the lattice Boltzmann method, LBM flow field data serves as core drive and is transmitted to the combustion module, the flue gas transportation module and the multi-component transportation module in real time, accurate convection and diffusion information is provided, meanwhile, the self-adaptive grid refining module dynamically adjusts the grid resolution according to the gradient of key physical quantities, and therefore the fire modeling accuracy is improved. The accuracy can be ensured, the calculation amount is reduced, and the calculation speed is increased. And the prediction precision, robustness and real fire complexity capturing capability of the model are obviously improved.

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 relates to the field of immersed cooling liquid of transformers, and discloses a heat dissipation mechanism and an efficient immersed cooling liquid cooling device.The heat dissipation mechanism comprises an ionic wind heat dissipation piece, and the ionic wind heat dissipation piece comprises a flow guide pipe, a net electrode located at the top end of the flow guide pipe and a needle electrode located at the top end of the flow guide pipe; the flow guide pipe is arranged to be in an inverted cone shape. The mounting frame comprises an insulating frame and a connecting piece arranged on the outer side of the insulating frame; the number of the mounting racks is two, and the two mounting racks are respectively used for mounting the flow guide pipe and the needle electrode; according to switching of multiple cooling modes under low, medium and high load operation of the transformer body, the adaptive capacity of the transformer body to load changes is improved, meanwhile, forced air cooling convection can be achieved without starting a draught fan, the heat dissipation effect of immersed cooling liquid is guaranteed, and noise is avoided.

The utility model discloses a charging device, which comprises a mounting rack, a charging assembly and a fan assembly, the charging assembly and the fan assembly are respectively mounted on the mounting rack, the mounting rack is provided with a front surface and a back surface opposite to each other, the charging assembly is arranged on one side, close to the front surface, of the mounting rack, and the fan assembly is arranged on one side, close to the back surface, of the mounting rack. An air outlet is formed in the side, close to the back face, of the mounting frame. The fan assembly can accelerate the fluidity of airflow, so that the convection heat exchange effect is enhanced, the heat dissipation capability of the charging equipment is enhanced, and the influence of heating of the charging equipment on the charging efficiency is reduced; meanwhile, the charging assembly is arranged close to the front face, the front face is used for making contact with the electronic equipment, the air outlet is formed in the side, close to the back face, of the mounting frame, the fan assembly can drive airflow to be exhausted out of the charging equipment from the air outlet when working, and it is prevented that hot air obtained after heat exchange blows towards the electronic equipment to affect the charging efficiency of the electronic equipment; and hot air can be prevented from blowing to the hand of the user holding the electronic equipment, so that the use experience of the user is improved.

The invention discloses a proton exchange membrane fuel cell bipolar plate flow channel structure based on a bionic structure, the proton exchange membrane fuel cell bipolar plate flow channel structure comprises a cathode flow field plate body and a plurality of gas flow channels arranged in the cathode flow field plate body, and two ends of each gas flow channel are respectively provided with a gas inlet and a gas outlet; a plurality of fin-shaped flow guide blocks are arranged in each gas flow channel, and flow channel side shrinkage flow guide blocks are arranged at the fin-shaped flow guide blocks; when the fin-shaped flow guide blocks and the side shrinkage flow guide blocks are used in a combined mode, a flow field in the flow channel can generate periodic forced convection in the direction perpendicular to the flow channel and can also generate periodic forced convection in the direction parallel to the flow channel. While the high gas passing ability is maintained, the flow field is accelerated by changing the vertical sectional area of the flow channel, and the convection effect of the gas to the GDL layer is actively enhanced.

The invention relates to the field of thermodynamics and fluid mechanics, and discloses a heat dissipation method and system for an ultra-thin small-size integrally-formed inductor, and the method comprises the steps: fitting an electromagnetic-thermal coupling analysis network of the integrally-formed inductor, calculating a core heat source of the integrally-formed inductor, and constructing a heat distribution diagram of the integrally-formed inductor. Determining the flow channel layout of the integrally formed inductor, analyzing the flow channel Nusselt number and the flow channel friction factor of the micro-flow channel corresponding to the integrally formed inductor, determining the flow channel geometric characteristics of the micro-flow channel, and constructing a micro-flow channel heat dissipation network of the integrally formed inductor; determining a circulating heat dissipation path of the micro-channel heat dissipation network, analyzing an equivalent heat conductivity coefficient of a heat dissipation medium corresponding to the micro-channel heat dissipation network, and calculating a convective heat transfer coefficient and a total heat dissipation amount of the micro-channel heat dissipation network so as to analyze the heat dissipation performance of the micro-channel heat dissipation network; and determining the circulation flow rate of the micro-channel heat dissipation network so as to execute circulation heat dissipation of the integrally formed inductor. The heat dissipation effect of the ultra-thin small-size integrally-formed inductor can be improved.

The invention relates to the technical field of water treatment, in particular to an environment-friendly injection type air dissolving device for water treatment, which comprises an air dissolving tank, an extension mechanism, an adjusting mechanism, a turbulent flow mechanism and an extrusion mechanism. By changing the relative height between the impeller and the connecting pipe, the connecting frame is forced to slide along the blades, the range of bubble spraying is conveniently adjusted, through sliding of the connecting frame, the guide block is forced to drive the positioning strips to be close to each other or the positioning strips are forced to be far away from each other through the ejector block, and by changing the long and narrow degree of the water flow channel, the bubble spraying effect is improved. The diameter of generated bubbles is guaranteed by adjusting the opening degree of spray holes, an extrusion block is driven by sliding of two adjusting plates to extrude an air bag, so that a rotating shaft is forced to drive the interior, provided with a groove, of a connecting block to rotate out, flowing water is disturbed through a turbulent flow head, the bubble generation effect is further improved, and the air flotation treatment effect is improved.

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.