268 results about "Cavitation bubble" patented technology

The invention provides an acoustic coalescence elimination method for hydrogen bubbles in molten aluminum, and belongs to the technical field of molten aluminum bubble elimination. According to the method, sound field collaborative focusing is achieved by arranging a phase control array transducer set in a molten aluminum smelting furnace, primary gathered sound waves and efficient coalescence sound waves are applied in stages according to bubble size evolution in a double-frequency scanning mode, and the hydrogen bubbles in the molten aluminum are eliminated. A target frequency is dynamically adjusted in combination with a bubble resonance frequency optimization model to match the inherent frequency of a bubble, a sound-bubble coupling dynamic tracking system is used for monitoring bubble evolution triggering stage switching in real time, and a sound field focus point dynamically scans and covers a three-dimensional space area through phase delay control. A delay detection method is adopted to eliminate cavitation bubble interference and accurately measure the hydrogen content, sound intensity and frequency parameters are optimized according to a sound field parameter self-adaptive regulation and control model, and the technical problem that hydrogen bubbles in a molten aluminum deep area are difficult to be effectively driven by sound waves and cannot be fully coalesced and eliminated is solved.

The invention discloses a cavitation erosion strength prediction method and system coupled with a multi-scale material model, relates to the technical field of engineering computational fluid mechanics, and aims to solve the problem that the influence of material response cannot be considered in cavitation erosion assessment of a hydraulic machinery overflow pipeline in the prior art. Calculating the macroscopic evolution process of the cavitation bubbles in the cavitation flow field by using the cavitation model to obtain macroscopic evolution information of the cavitation bubbles, and converting all small cavitation bubbles into single bubbles according to the macroscopic evolution information; and calculating the microcosmic dynamic process of the single bubble to obtain microcosmic dynamic information, calculating the impact load of the single bubble according to the microcosmic dynamic information, and synthesizing the impact load of the single bubble in all time steps to calculate the material cavitation erosion incubation period of the overflowing pipeline, namely the cavitation erosion strength. According to the method, the dynamic evolution process of large-scale cavitation bubbles and small-scale cavitation bubbles can be described at the same time, and the cavitation erosion strength forecasting is spanned from qualitative to quantitative.

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.

The invention relates to a paint coating cavitation erosion resistance evaluation method based on an ultrasonic technology, belongs to the technical field of paint coating performance evaluation, and solves the problem that in the prior art, it is difficult to comprehensively observe and accurately simulate an ultrasonic bubble dynamic process in a laboratory. The method comprises the following steps: preparing a sample wafer on a steel plate by adopting a unified process, placing the sample wafer in an experimental water tank, generating a cavitation bubble group by using an ultrasonic generator to simulate cavitation erosion, collecting data through equipment such as a high-speed camera, a hydrophone and a pressure sensor, and obtaining damage time and area by virtue of an image processing algorithm and a super field depth microscope. And the cavitation erosion resistance is analyzed and evaluated through data processing. Rapid and accurate evaluation can be realized in a laboratory, the test period is shortened, and the cost is reduced; the evaluation accuracy, reliability and repeatability are improved; and a scientific basis can be provided for coating research and development, quality control and engineering application.

The embodiment of the invention provides a method and equipment for measuring phase interface parameters between nuclear reactor fuel assemblies, and belongs to the technical field of thermal hydraulic analysis of nuclear power plants. The method comprises the steps that cavitation bubbles are generated in the flow channel of the special-shaped structure; images of cavitation bubbles in the flow channel of the special-shaped structure in multiple directions are collected; performing three-dimensional reconstruction according to the images of the cavitation bubble in the multiple directions to obtain the volume of the cavitation bubble; the void fraction is determined according to the volume of the void and the total volume of the fluid domain in the special-shaped structure flow channel, and the phase interface parameters comprise the volume of the void and the void fraction. According to the embodiment of the invention, the measurement precision of phase interface parameters can be improved.

The invention discloses a near-wall single-cavity collapse numerical simulation method and device coupled with boundary motion, and the method comprises the steps: 1, introducing a near-wall single-cavity physical model into a pre-constructed external flow field, and obtaining a corresponding flow field physical model; step 2, carrying out grid division on the flow field physical model; setting an initial condition and a flow field boundary condition, and setting a time step length meeting a calculation requirement; 3, setting specific calculation parameters in the process of solving the flow field, and introducing a fluid volume method to capture a gas-liquid interface; and 4, applying wall surface vibration in the form of a user-defined function, and simulating cavitation dynamic behaviors under vibration impact. According to the method, the influence of wall surface vibration is considered in the numerical simulation process in a mode of coupling boundary motion, the simulation of the dynamic behavior of the near-wall single cavitation bubble under the vibration impact condition is realized, and the influence of conditions such as vibration frequency on the cavitation bubble collapse process can be further explored on the basis; and theoretical guidance is provided for optimized cavitation inhibition design.

The utility model discloses a device for detecting cavitation performance of a pump turbine model test based on acousto-optic analysis, which comprises a pump turbine model test bed (1), and the pump turbine model test bed (1) is respectively connected with an optical image acquisition module (2) and a multi-channel integrated acoustic emission acquisition module (3). The system further comprises a signal processing module (4), the input end of the signal processing module (4) is connected with the pump turbine model test bed (1), the optical image acquisition module (2) and the multi-channel integrated acoustic emission acquisition module (3), and the output end of the signal processing module (4) is provided with a display terminal (5). The utility model has the characteristic that the cavitation bubble image and the bubble breaking sound of the water turbine can be effectively and accurately acquired.

The invention discloses a cavitation bubble group internal structure observation method and device based on plane waves in the technical field of cloud bubble measurement, and the method comprises the steps: carrying out a hydrofoil experiment in a water tank, and generating to-be-observed cloud bubbles; adjusting the ultrasonic imaging probe array through computer programming, and adjusting time delays of different array elements to generate a plurality of plane waves with different deflection angles; collecting plane wave echoes received by each array element, and storing echo data corresponding to each deflection angle; coherent superposition is carried out on image data obtained at different deflection angles, the contrast ratio and the signal-to-noise ratio of imaging are improved, and the effect equivalent to focusing imaging is obtained.

The invention discloses automatic cleaning equipment for geothermal well maintenance, and relates to the technical field of geothermal well cleaning equipment.The automatic cleaning equipment comprises a pipeline adaptive cleaning assembly, the pipeline adaptive cleaning assembly extends into a geothermal well and can clean the inner walls of pipelines with different sizes of the geothermal well, and the top of the pipeline adaptive cleaning assembly is connected with a magnetic connecting structure; under the cooperation of the pipeline adaptive cleaning assembly, the shaft joint mechanical arm and the magnetic connecting structure, the whole device can accurately adapt to vertical, bent and variable-diameter pipelines through the cooperation of laser ranging and a lead screw sliding block adjusting structure and the cooperation of a self-driving wheel and a transmission rod structure, the problems of pipe clamping and blind areas of traditional equipment are solved, and the working efficiency is improved. And by means of the arrangement that the focus of ultrasonic waves coincides with the center of high-pressure water flow, the composite effect that cavitation bubble impact is matched with mechanical water flow cleaning is formed, the hard scale removing efficiency is effectively improved, and under the cooperation of the variable-angle inclined spray head and the adjustable spray hole structure, the circumferential direction can be covered, and different scales can be accurately hit.

The invention discloses a cleaning device and a cleaning method for an airplane sewage system, and relates to the technical field of airplane cleaning.By means of the cleaning device and the cleaning method, cleaning liquid in a pipeline assembly is heated through a heating unit, so that the chemical activity of the cleaning liquid is good, and dirt in an airplane sewage discharging pipeline can be treated; the ultrasonic unit can transmit longitudinal high-frequency vibration waves into the cleaning liquid, and cavitation bubbles generate strong shock waves around the airplane blow-off pipeline to repeatedly impact a dirt layer until dirt falls off; meanwhile, greasy dirt excreted by a human body can be decomposed and emulsified, the inner wall of the airplane blow-off pipeline cannot be damaged by ultrasonic waves, the first ultrasonic wave generating unit can prevent dirt or greasy dirt from being bonded in the pipeline assembly, and the second ultrasonic wave generating unit can transmit the ultrasonic waves to the airplane blow-off pipeline; and in each pressure cleaning process, multiple times of bidirectional circulating cleaning are carried out, so that the cleaning effect is better, and solid waste can be thoroughly discharged.

The invention discloses an optical path adjusting system for in-situ dynamic calibration of a pressure sensor based on laser cavitation. In a ship working underwater, a pulse laser is used for emitting a beam of pulse laser, the pulse laser passes through a designed light path adjusting system and then is focused near a calibrated pressure sensor through a light through hole in a cabin wall in the ship, and a laser-induced cavitation phenomenon is generated. A microsecond pressure shock wave generated by cavitation bubbles in a collapse stage is used as an excitation signal to calibrate the pressure sensor in an actual in-situ environment. Meanwhile, a set of algorithm is designed on the basis of a light path adjusting system, and pressure sensors at different positions can be calibrated. According to the light path adjusting system, the required device is simple in structure, the cost is lower, and the system is suitable for popularization.

The present invention provides a centrifugal cavitation generator comprising a housing, an impeller, and a drive device. The impeller is located within the housing and includes a flow guide and a hollow housing. The hollow housing is provided with a flow guide on one side for guiding liquid into the housing, and the other side of the hollow housing is connected to the drive device. The hollow housing is provided with at least one set of through-hole units. The rotation of the impeller causes liquid to flow out through the through-hole units, generating a cavitation cloud. The housing wall is provided with several protrusions, located near the through-hole units on the hollow housing, to collapse the cavitation bubbles. The present invention utilizes the mechanical, thermal, and chemical effects generated by this energy to achieve wastewater degradation and treatment.

An apparatus for sensing cavitation in liquid flowing through a conduit in a housing includes an ultrasonic transducer system having one or more ultrasonic transducers attached to the housing and arranged in acoustic communication with the liquid, and control electronics connected to the ultrasonic transducer system. The control electronics is configured to drive the transducer system to send an ultrasonic signal through the flowing liquid, wherein the transducer system receives the ultrasonic signal and generates an electronic cavitation detection signal representing a strength of the received ultrasonic signal. The control electronics is further configured to process the cavitation detection signal to provide a cavitation measurement signal indicative of whether or not the ultrasonic signal interacted with one or more cavitation bubbles, evaluate the cavitation measurement signal to determine if one or more alarm conditions is met, and output an alarm signal when each of the cavitation alarm condition(s) is met.

A method and apparatus for finishing a surface of a component. The method includes installing the component in an apparatus configured to deliver a flow of abrasives to the surface and to generate cavitation bubbles in a liquid contacting the surface using a cavitation generator that includes an ultrasonic generator configured to generate cavitation bubbles in the liquid contacting the surface by ultrasonic excitation in the liquid or a laser configured to generate cavitation bubbles in the liquid contacting the surface by laser excitation in the liquid; controlling the cavitation generator such that cavitation bubbles are generated to finish the surface by implosion of the cavitation bubbles; and controlling the flow of slurry to the surface so as to finish the surface by abrasion. An apparatus for finishing a surface of a component is also disclosed.

The invention discloses an ultrasonic-assisted jet machining method and a workpiece. The ultrasonic-assisted jet machining method comprises the steps that a jet device and a workpiece to be machined are oppositely arranged, a jet outlet faces the surface of the workpiece, and the workpiece and the jet device are connected with a plasma power source; electrolyte is guided into the cavity, the jet device is controlled to conduct ultrasonic vibration, the electrolyte is made to generate cavitation bubbles, and mixed fluid is obtained; and the voltage and duty ratio of the plasma power supply are adjusted, so that the mixed fluid generates plasma through the jet flow outlet, and a plasma oxide layer is generated on the surface of the workpiece. The plasma intensity is improved through ultrasonic cavitation, the thickness of an oxidation layer is increased, a compact and uniform ceramic film layer can be generated on the metal surface through plasma oxidation, the wear resistance and the corrosion resistance of the ceramic film layer are remarkably superior to those of an anodic oxidation or hard anodic oxidation film, and the service life of a workpiece can be remarkably prolonged.

The invention discloses a method for continuously preparing nano-emulsion in an ultrasonic micro-packed bed reactor. According to the ultrasonic micro-packed bed reactor disclosed by the invention, the large-radiating-surface horn-shaped sandwich type transducer and the capillary microreactor are glued, and the solid filler is assembled in the microreactor, so that effective interception of acoustic cavitation bubbles under the condition of high liquid phase flow can be realized, and the ultrasonic energy efficiency is improved. The capillary microreactors are connected through a stepped structure, so that the filler can be freely detached, and the structure, size and material of the filler are convenient to replace. Through continuous conveying equipment, a continuous phase and a dispersed phase are mixed and emulsified in the reactor, and efficient and rapid preparation (2-180s) of the nano-emulsion (the average size is 20-500nm) can be realized. According to the method, the preparation time of the nano-emulsion is shortened (5-60 minutes in the prior art), continuous production is realized, and the method is simple and convenient to operate and easy to integrate and amplify in parallel.

The invention provides an ultrasonic parameter adaptive adjustment and cleaning evaluation method in a wafer cleaning process, and relates to the technical field of semiconductor manufacturing, and the method comprises the steps: calculating sound field energy distribution through collecting wafer surface temperature distribution and cavity vibration response data; based on the temperature gradient and the sound intensity gradient, calculating the micro-flow field distribution of the cleaning fluid, and establishing a cavitation bubble collapse characteristic matrix; recognizing and cleaning a dead zone through singular value decomposition of the feature matrix, and controlling a piezoelectric transducer to generate focused ultrasonic waves; meanwhile, the plasma resonance sensor is used for monitoring the surface adsorption characteristic change and evaluating the cleanliness. According to the invention, real-time self-adaptive adjustment of ultrasonic cleaning parameters is realized, and the cleaning uniformity and efficiency are improved.

The invention belongs to the technical field of water-based cleaning machines, and relates to a water-based cleaning machine applying double impellers to intensify cleaning. The cleaning machine comprises a cleaning machine body, the cleaning machine body comprises a sealing cover, a cleaning machine box body, a supporting column, a water drainage pipe, a one-way valve and a water drainage port, an ultrasonic transducer is arranged below the cleaning machine box body, a cleaning cavity is formed in the cleaning machine box body, and a cleaning basket and a rotating frame which can rotate in the axial direction are arranged in the cleaning cavity. The bidirectional rotary impeller device and the ultrasonic transducer are arranged, the cleaning characteristics of wide coverage and coarse precision of vortex cleaning and the cleaning characteristics of high precision and narrow range of ultrasonic cleaning are combined, and directional barrier breaking is achieved by means of the ultrasonic microscale penetration characteristic aiming at cleaning pain points of complex workpiece blind hole slit structures and high stain adhesive force; the cavitation bubbles are driven to collapse in the slits (smaller than or equal to 1 mm) to generate high-pressure microjet, and the limitation of the single cleaning scale of traditional cleaning is broken through.

The invention provides a preparation method of porous graphene, and belongs to the technical field of graphene preparation. The preparation method comprises the following steps: dispersing graphite powder in a solution, carrying out high-speed turbulence treatment on a graphite dispersion liquid, and carrying out centrifugal treatment on the treated dispersion liquid to obtain the porous graphene. According to the invention, turbulent flow and cavitation effects are formed in the high-speed turbulent flow treatment process, and the stripping of the graphite sheet layer is realized by using inertia force, viscous shearing force and Reynolds shearing force generated by the turbulent flow; and high-pressure micro-jet is generated at the collapse moment of the cavitation bubbles and continuously impacts the graphene to form holes. In the preparation process, related flow fields are all full turbulent flow fields, turbulent flow and cavitation effects can be generated by means of high-speed turbulent flow, the preparation process is simple and mild, and the defects that other preparation methods adopted at present are harsh in preparation condition and tedious in preparation process are overcome.

The invention discloses a propeller two-phase flow multi-scale cavitation bubble measurement system based on laser digital holography, and belongs to the field of cavitation flow measurement. The device comprises an experiment section, an experiment model, a supporting rotating shaft, a polarization laser, a concave lens, a first convex lens, a second convex lens, a digital camera, a lens, a dimmer, a synchronous triggering system and a data analysis system. Linear polarization laser is emitted by the polarization laser and is collected by the first convex lens after being expanded by the concave lens, the collected light is collected and collimated by the second convex lens after being collected at the focus of the first convex lens, and parallel light is formed and irradiated to a cavitation area generated by the propeller in the experimental section. Part of the light is diffracted and deviated to form object light when passing through the vacuole, the light which does not pass through the vacuole forms reference light, and alternately dark and bright stripes formed by interference of the object light and parallel light are refracted by the dimmer and the lens and recorded on a digital camera negative film. According to the invention, non-contact measurement of the two-phase flow field of the propeller is realized by using interference recording and diffraction reconstruction.

The invention discloses a cavitation effect enhancing device of an ultrasonic cleaning machine and a multi-material workpiece accurate descaling method.The cavitation effect enhancing device is installed on the ultrasonic cleaning machine and comprises an intelligent control mechanism, a water flow jetting mechanism, a monitoring mechanism, a circulating assembly and a sealing protection assembly; the intelligent control mechanism can receive and analyze monitoring signals transmitted by the monitoring mechanism in real time and output control instructions to adjust working parameters of the water flow jetting mechanism, the ultrasonic transducer and the circulation assembly. The water flow spraying mechanism is located in the cleaning tank and used for spraying water flow to impact the workpiece and disturb the cleaning liquid. The ultrasonic cleaning device has the beneficial effects that through injection and water flow disturbance of the water flow injection mechanism, removal of dissolved gas in cleaning liquid is promoted, the number of cavitation bubbles is increased, meanwhile, the intelligent control mechanism dynamically adjusts the power of the ultrasonic transducer, the power density is improved, the collapse energy of the cavitation bubbles is enhanced, and the cavitation effect strength is remarkably improved.

The invention discloses a non-contact conduction type weak ultrasound-assisted laser direct energy deposition device and method, and belongs to the technical field of additive manufacturing equipment. The invention discloses a non-contact conduction type weak ultrasound-assisted laser direct energy deposition device. The non-contact conduction type weak ultrasound-assisted laser direct energy deposition device comprises a powder feeding printing part, a printing platform and an ultrasonic vibration part. The printing end of the powder feeding printing part and a molten pool formed in the upper surface of the printing platform are oppositely arranged. The output end of the ultrasonic vibration part is arranged at a fixed distance from the molten pool; and the ultrasonic vibration part is fixedly connected with the powder feeding and printing part. According to the device disclosed by the invention, ultrasonic sound waves output by the ultrasonic vibration component in the printing process are attenuated from the emission head through air (protective gas) and enter a molten pool in a non-contact transmission mode, and negative effects such as over-strong cavitation bubbles are avoided while grain refinement and residual stress elimination are realized.

The invention provides an ultrasonic microcavity reactor which comprises a reactor main body and an ultrasonic wave generating device, and the reactor main body is installed in an ultrasonic wave radiating surface of the ultrasonic wave generating device; at least one micro-cavity unit is arranged in the reactor main body, the micro-cavity unit is of a hollow pipeline structure extending in the horizontal axial direction, and the inner diameter of a cavity of the micro-cavity unit sequentially comprises an axial divergent section with the cross section area continuously increasing from the inlet end of the axial divergent section to the outlet end of the axial divergent section in the fluid flowing direction; and the axial gradually-shrinking section is positioned at the downstream of the axial gradually-expanding section, and the cross sectional area of the axial gradually-shrinking section is continuously reduced from the inlet end of the axial gradually-shrinking section to the outlet end of the axial gradually-shrinking section. The micro-cavity unit is designed into a rotational flow cavity which is gradually expanded and gradually shrunk in the axial direction; therefore, a hurricane type cavitation bubble group can be formed in the reaction cavity of the ultrasonic microcavity reactor. Compared with a conventional ultrasonic cavitation reactor, hurricane type cavitation bubbles can be generated, the sound field distribution is concentrated, the shearing capacity is high, and the mixing and emulsifying effects are good.

The invention relates to an ultrasonic signal generation method for controlling cavitation bubbles. The ultrasonic signal generation method for controlling cavitation bubbles comprises the following steps: determining a transmission ratio of a first frequency ultrasonic signal to a second frequency ultrasonic signal; generating the first frequency ultrasonic signal towards a target area based on the sending proportion so as to enable cavitation bubbles to expand in the target area; and generating the second frequency ultrasonic signal towards the target area based on the sending proportion, so as to stop the expansion of the cavitation bubbles.

The invention discloses a chemical reaction device based on combination of ultrasound and mechanical energy. Belongs to the technical field of mutual intersection of ultrasound, chemical reaction, structural materials and motor driving. The ultrasonic amplitude rod is connected to the inner wall of the reaction cavity; the piezoelectric plate is connected to the outer wall of the reaction cavity; the battery is connected to the platform, and the piezoelectric plate is connected to the battery through the switch; the stirring rotating shaft is vertically connected to the reaction cavity cover; the motor is connected with the stirring rotating shaft through a helical gear pair; when the switch is pressed down, the battery continuously supplies power to the piezoelectric plate, and when the negative pressure of sound waves reaches a certain degree, cavitation bubbles which expand and contract along with the action of the sound waves can be formed in the liquid; after the motor is started, electric energy is converted into mechanical energy to drive the stirring rotating shaft to rotate. The chemical reaction efficiency is improved in a mode of combining ultrasonic and mechanical energy, and the device has the characteristics of easiness in miniaturization, easiness in cleaning, easiness in treatment and the like.

The present invention provides a method and apparatus for transferring at least one object from a donor substrate (30) to a target substrate (40), the donor substrate (30) having a thickness e z The carrier liquid forms a surface on which a film of the carrier liquid is deposited in the vertical direction Z, and the carrier liquid is transferred to the surface. x , D y , D z ), the transfer being ensured by local energy excitation of the liquid to form local cavitation bubbles at the object, D z / e z The method and the device are characterized in that the ratio is greater than 1, preferably greater than 1, preferably greater than 0.5.

The invention discloses a pump jet flow field testing device and a flow field missing compensation method. The pump jet flow field testing device comprises a high-frequency double-pulse laser, an image processing system, a camera synchronizer, a high-speed camera, a cavitation bubble water cylinder, a reflecting prism, a pump jet model and a transparent conduit. The high-frequency double-pulse laser is placed at the rear end of the pump spraying model in the cavitation bubble water cylinder, and laser emitted by the high-frequency double-pulse laser irradiates the pump spraying model through the cavitation bubble water cylinder; installing a reflecting prism and a high-speed camera on a laser plane of the pump spraying model; the data assimilation used by the image processing system and based on the generative adversarial network model effectively solve the problems of complex structure shielding, particle concentration loss and flow field information loss caused by wall reflection. According to the invention, the problem that related experimental devices for testing the internal flow field of the pump-jet propeller are not perfect enough is solved, the pump-jet missing flow field is effectively compensated, and the method is of great significance for the pump-jet propeller to know the form evolution law of the internal flow field from the experimental mechanism and to forecast the noise of the subsequent pump-jet propeller and calculate and verify the flow field.

The present invention discloses a method for strengthening cavitation and mixing in an ultrasonic microreactor, by introducing a mutual dissolving solution consisting of a gas-rich solution and a gas-poor solution into the ultrasonic microreactor; Meanwhile, a certain ultrasonic frequency and ultrasonic power are applied to the ultrasonic microreactor, and under ultrasonic action, these mutual dissolving solutions precipitate a large amount of gas nuclei and rapidly grow into cavitation bubbles, producing a violent cavitation effect, and the violent cavitation effect strengthens the mixing in the ultrasonic microreactor. Wherein, the nitrogen saturation solubility of the gas-rich solution is 1.3 45 times that of the gas-poor solution, and the volume flow rate of the gas-rich solution is 0.025 20 times that of the gas-poor solution. The present invention makes the average density of cavitation bubbles in a single microchannel in the ultrasonic microreactor be ≥1 / microliter, and a large amount of cavitation bubbles quickly stir the fluid like a stirrer, and the complete mixing time of the fluid is less than 100 milliseconds. The present invention solves the problem that cavitation is weak in the ultrasonic microreactor and cannot achieve millisecond mixing.

The present invention discloses a method and device for predicting cavitation erosion in a gas phase condensation process, and an electronic device, comprising: calculating the potential power in each unit based on the energy generated when the cavitation bubble collapses; dividing the potential power in each unit by the unit volume to obtain the potential power density; simplifying the potential power density; calculating the gas phase condensation rate; constructing a modified cavitation prediction calculation model based on the simplified potential power density and the gas phase condensation rate, wherein the gas phase condensation rate is less than zero; establishing a three-dimensional hydrofoil model and sequentially performing flow channel extraction and calculation domain processing to obtain a three-dimensional fluid calculation domain model; meshing the three-dimensional fluid calculation domain model to obtain a grid model; performing fluid simulation calculation on the grid model to obtain calculation data; based on the calculation data, using the modified cavitation prediction calculation model to calculate and obtain a cavitation erosion cloud map; and obtaining a cavitation erosion prediction result based on the cavitation erosion cloud map.

The utility model discloses a catamaran propelling device which comprises a catamaran body (1), a paddle propelling device (2), a deck (3), paddles (4), a gear (5), a chain (6), a roller (7), an inner chain plate (8), a sleeve (9), a pin shaft (10), an outer chain plate (11) with paddles and an outer chain plate (12) with paddles. The paddles are driven through rotation of the chain, and the catamaran is pushed to move through interaction of the paddles and water. Water flow between the two ship bodies can be adjusted and rectified, the flowing state of the water flow is changed, and resistance received by the catamaran is reduced. Due to the action characteristics of the paddles, cavitation bubbles can be reduced, the propulsion efficiency is improved, and the navigation stability and the operation performance of the ship are improved.