35 results about "Jet velocity" patented technology

The invention belongs to the technical field of liquid metal 3D printing, and particularly relates to a melt impact jet flow regulation and control system for an open launder. A pressure heat preservation device inputs gas into the pressure heat preservation device through a gas conveying pipeline and controls the gas flow to control the pressure in the pressure heat preservation device; the molten metal in the pressure heat preservation device is sprayed to a cooling platform located under the spraying device through the spraying device to be cooled; the laser Doppler radar velocimeter monitors the metal liquid jet velocity in real time and uploads the metal liquid jet velocity to the upper computer, the gas flow needing to be adjusted is calculated through a PID algorithm, a corresponding adjusting control instruction is generated and issued to the MFC and the electromagnetic valve or the small-aperture exhaust valve and the large-aperture exhaust valve, and therefore control over the jet velocity is achieved. Through jet velocity feedback monitored in real time, the flow of gas input into the pressure heat preservation device is adjusted in real time through a PID algorithm to control the pressure in the pressure heat preservation device in real time, and therefore accurate control over the jet velocity is achieved.

The invention relates to the technical field of spinning machine air injection speed balancing, in particular to a spinning machine air injection speed balancing method and system based on an oval eccentric air chamber, and the method comprises the following steps: changing a second air chamber in double air chambers into an oval air chamber, and shifting the oval air chamber towards a supply pipe by setting a centrifugal distance; calculating the gas mass flow at the inlet of the supply pipe, and further solving the pressure distribution of the first gas chamber; mapping the ellipse to a circular domain, calculating a scale coefficient, and obtaining the pressure distribution of the elliptical air chamber in combination with the pressure distribution of the first air chamber; establishing a blowhole jet velocity calculation model, and calculating the jet velocity of the spinning machine by combining the pressure distribution of the elliptical air chamber; and the optimal ellipse semi-minor axis and centrifugal distance are solved with the aim of minimizing the speed variance of the air injection holes, and the form and position of the ellipse air chamber are adjusted. Through the design of ellipse and eccentricity, the pressure difference of the positions of the air injection holes is reduced, so that the flow is balanced, the speed difference of the air injection holes is reduced, and the production requirement of high-quality spinning is met.

The application is suitable for the technical field of fluid mechanics experiment, and provides a circulating water tunnel blade impact jet velocity multi-stage regulation test device, which comprises an experimental water tunnel, a velocity multi-stage regulation mechanism, a water pump, a laser generator, a pulse laser controller, a blade angle adjusting mechanism, a high-definition CCD camera, a water tank, an image acquisition computer and a signal synchronous collector; the water tank, the water pump and the experimental water tunnel are connected through pipelines to form a circulating loop; the velocity multi-stage regulation mechanism is installed on the experimental water tunnel; the blade angle adjusting mechanism is installed on the back plate of the experimental water tunnel; the laser generator is arranged above the experimental water tunnel; the optical axis of the high-definition CCD camera is perpendicular to the pulse laser sheet light provided by the laser generator; and the image acquisition computer is signal-connected with the high-definition CCD camera through the signal synchronous collector. The device can dynamically simulate the complex actual working conditions of a hydraulic torque converter with high fidelity, and realizes the visual measurement of the blade near-wall flow field.

The invention discloses a plasma spraying intelligent closed-loop control method based on machine learning. The plasma spraying intelligent closed-loop control method comprises the steps that firstly, the jet velocity and the jet temperature under different technological parameters are collected; 2, constructing a machine learning model; 3, the jet velocity and the jet temperature are input into the machine learning model, the coating performance of the predicted spraying sample is obtained, and technological parameters are fed back and adjusted: if the predicted coating performance deviates from the application boundary by 0-9%, the technological parameters are not changed; if it is predicted that the coating performance deviates from the application boundary by 10-20%, 1-2 technological parameters which have the highest weight and have the forward influence on the coating performance are adjusted; if the predicted coating performance deviates from the application boundary by 21-39%, coordinating and adjusting 3-4 process parameters which have the highest weight and have positive influence on the coating performance; and if the predicted coating performance exceeds 39% of the application boundary, the PLC cuts off the power supply, stops powder feeding, and introduces the protective gas. The method has the characteristic of improving prediction accuracy and adaptability.

The invention discloses an additive manufacturing process optimization method and system based on jet electrochemistry, and belongs to the technical field of additive manufacturing. The method comprises the steps that the pH value, the ion concentration, the temperature and the current density of a deposition interface micro-area are obtained in real time through a micro-area sensing array integrated in a jet flow nozzle; jet velocity, pressure, electrolyte components and environment interference information are synchronously collected; constructing a uniform process state representation vector for the multi-source heterogeneous data; inputting the vector into a pre-trained multi-physical field coupling process model to realize millisecond-level prediction of the deposition rate, the morphology and the side reaction probability; a reinforcement learning controller is used for generating a self-adaptive adjustment instruction for the voltage, the jet velocity and the nozzle track; the problems that in the prior art, the deposition process is unstable, and real-time micro-area sensing and regulation lag is lacked are solved, in-situ sensing and dynamic regulation of the micron space scale and the millisecond time scale are achieved, and the compactness, the component uniformity and the forming precision of a deposition layer are remarkably improved.

The invention provides a conical shaped charge liner energy-gathered warhead material density, thickness and angle optimization design method based on a BP neural network and a conical shaped charge liner energy-gathered warhead. The method comprises the steps that core components and characteristics of a conical shaped charge liner are determined, the shaped charge liner is located at the front end of a main charge, and the shaped charge liner and the main charge are coaxially arranged; the cone top of the shaped charge faces the direction away from the main charge, the conical surface makes contact with the main charge to form an energy gathering structure symmetrical to the central axis, and the detonating device is arranged in the center of the end, away from the shaped charge, of the main charge to ensure that detonation waves are symmetrically spread from the end to the shaped charge; acquiring data of jet velocity, penetration depth, jet head shape and jet tail dispersion degree under different shaped charge liner parameter combinations through a numerical simulation tool; based on the obtained data, a BP neural network model is used for optimization, the optimal parameter combination of the shaped charge liner is screened out, the jet velocity, stability and penetration depth are precisely regulated and controlled, and the requirements of different damage scenes are met.

This invention provides a method for optimizing the uniform gas distribution of an airflow distributor in a biogas-liquid reactor, belonging to the technical field of biogas-liquid reactors. It solves the problem of the lack of a systematic optimization method in existing technologies. The method includes: estimating the critical velocity for seepage at the jet orifices; calculating and initially selecting the required number of jet orifices, the total length and number of all jet pipes, and initially selecting the airflow distributor structure; determining the frictional resistance coefficient f, momentum recovery coefficient k, and jet orifice flow coefficient c; analyzing the pressure drop distribution characteristics along the pipe length and the total pressure loss within the pipe; based on the analysis results, determining the airflow distributor parameter combination that meets the conditions; and outputting the final airflow distributor design parameters when the jet velocity and non-uniformity of each jet orifice simultaneously meet the preset seepage prevention conditions and non-uniformity requirements. This invention achieves optimized design of the airflow distributor structure.

The present application relates to the field of jet propulsion technology, and provides a micro-mixing nozzle structure with staggered outlet velocity and a combustion chamber. The micro-mixing nozzle structure comprises a mounting seat and a first nozzle unit; the first nozzle unit comprises a plurality of side-by-side arranged premixing micro-pipes, among which a part is reference position premixing micro-pipes and the other part is staggered position premixing micro-pipes; along the axial direction of the premixing micro-pipe, the premixing micro-pipe has an inlet end, an outlet end and a gas passage; the inlet end is provided with an oxidant inlet, and the side wall of the premixing micro-pipe is provided with a fuel inlet communicating with the gas passage; the effective areas of the oxidant inlets corresponding to the staggered position premixing micro-pipes and the reference position premixing micro-pipes are different, so that the jet velocities of the outlet ends of the staggered position premixing micro-pipes and the reference position premixing micro-pipes are different. The present application arranges the different premixing micro-pipes in a staggered manner according to the jet velocity, realizes the staggered arrangement of the flame delay time of the different premixing micro-pipes, effectively suppresses the combustion oscillation, and can ensure the stability of the flame combustion.

The invention discloses a gas-liquid integrated jet device, and belongs to the technical field of fluid jet. The device comprises a jet flow nozzle and a compressed gas nozzle, wherein the jet flow nozzle and the compressed gas nozzle are of an interlayer structure; the jet nozzle is used for jetting high-pressure liquid jet, the compressed gas nozzle is used for jetting high-pressure gas jet, and the high-pressure gas jet speed is larger than or equal to the high-pressure liquid jet speed. By adopting a high-speed gas clamping jet flow fluid technology, the problem of speed attenuation or liquid gasification of liquid jet flow influenced by air resistance can be greatly reduced.

The invention relates to the field of electric appliances, and provides an air conditioner control method and device and an air conditioner. The method comprises the steps of obtaining position information of a user, and determining a target swing angle of a swing blade assembly according to the position information of the user; according to the position information of the user and the needed set blowing air speed, the target air supply speed of the air conditioner and the target air guide angle of an air guide plate are calculated based on the jet flow speed model and the jet flow track center line model of air supply of the air conditioner; and adjusting the air conditioner according to the target air supply speed, the target swing angle and the target air guide angle. According to the method, the jet velocity model and the jet trajectory center line model are introduced, the user position information is used for calculating the target air supply speed and the target air guide angle at the same time, and cooperative adjustment of the air speed and the air direction is achieved.

This invention relates to the field of electrical appliances, providing a control method, control device, and single-fan air conditioner. The air conditioner has an upper air outlet and a lower air outlet, both connected to a single fan. The method includes: acquiring the air conditioner's operating mode, indoor user information, and a preset target airflow velocity; calculating the target airflow velocity of the air conditioner based on a jet velocity model of the air conditioner's air supply according to the indoor user information and the target airflow velocity, and adjusting the single fan according to the target airflow velocity; adjusting the upper and lower air guide mechanisms in the upper air outlet according to the operating mode to supply air to the indoor environment; and adjusting the upper and lower air guide mechanisms in the lower air outlet according to the operating mode and the indoor user information to supply air to the indoor user. This invention assigns different functional roles to the upper and lower air outlets and dynamically adjusts them in conjunction with the user's actual state and airflow propagation laws, enabling the system to simultaneously consider the uniformity of the overall indoor thermal environment and the precise air supply needs of individual users.

The present application relates to the technical field of flow distribution disc, and particularly relates to a high-pressure flow distribution disc three-section flow groove anti-cavitation structure, which comprises a flow distribution disc, the flow distribution disc comprises two centrally-symmetrically arranged large waist-shaped grooves, small waist-shaped grooves are symmetrically arranged on the two sides of the large waist-shaped grooves, the small waist-shaped grooves are arranged through the flow distribution disc, three-section flow grooves and a second single-section flow groove are respectively arranged at the two ends of the large waist-shaped grooves, and the two three-section flow grooves are centrally symmetrically arranged; the three-section flow groove comprises three triangular grooves which are completely identical in structure, the three triangular grooves are arranged at equal intervals, and one end of a same circular-arc groove is communicated with the end portions of the three triangular grooves, and the other end of the circular-arc groove is communicated with the large waist-shaped groove. The present application can increase the flow area, reduce the jet velocity, weaken the influence of wall shear force, thereby inhibit vortex production, further inhibit cavitation phenomenon of the flow distribution disc of the axial plunger pump under high-pressure working condition, reduce flow pressure pulsation and cavitation, and improve the efficiency and service life of the axial plunger pump.

The invention relates to an ammonia-doped burner capable of adjusting ammonia incident flow, and belongs to the technical field of ammonia-doped burners, the ammonia-doped burner comprises a fuel cylinder, a primary ammonia spraying cylinder and a plurality of secondary ammonia spraying mechanisms, and the other port of the fuel cylinder is a fuel nozzle; the primary ammonia spraying cylinder sleeves the fuel cylinder in a clearance manner; the multiple secondary ammonia spraying mechanisms are distributed on the peripheral side of the primary ammonia spraying barrel at intervals in the circumferential direction of the primary ammonia spraying barrel, and multiple secondary ammonia spraying openings are formed in the peripheral side, corresponding to the primary ammonia spraying openings, of the secondary ammonia spraying mechanisms. According to the invention, the primary ammonia injection port of the primary ammonia injection cylinder is utilized to inject primary ammonia gas to the periphery of the fuel nozzle of the fuel cylinder, and then the secondary ammonia injection ports of the plurality of secondary ammonia injection mechanisms are utilized to inject secondary ammonia gas to the periphery of the fuel nozzle of the fuel cylinder; due to the fact that the secondary ammonia spraying openings of the secondary ammonia spraying mechanism sequentially swing from the axial direction of the fuel barrel to the radial direction of the fuel barrel, the jet flow speed and the jet flow angle of ammonia spraying of the secondary ammonia spraying openings can be changed, ammonia gas and fuel are fully mixed and combusted, generation of NOx is reduced, and the ecological environment is protected.

The present disclosure provides a combustor comprising: an end plate; and a plurality of nozzle units arranged on the end plate, the plurality of nozzle units being configured to be arranged in axial and / or central symmetry about a center of the end plate, each of the plurality of nozzle units having a plurality of nozzles therein, the nozzles being adapted to contain a mixture of fuel and air to form an outgoing premixed gas; wherein at least one of the plurality of nozzle units has a portion of the nozzles therein configured to have different structural features from the other nozzles to cause the premixed gas mixed by the portion of the nozzles to form an outlet jet velocity and / or a premixing uniformity of the premixed gas that is different from the other nozzles to suppress a thermoacoustic coupling of a thermoacoustic oscillation generated by the combustor.

A high-pressure mud jet erosion test system for determining the wear resistance of metallic substrates coated with Colomonoy-88 and Stellite-6, consisting of: a pressurized mixing vessel for receiving water and abrasive material, wherein the mixing vessel is sealed at the top with a watertight cap and a pressure relief valve is functionally connected at the top to regulate the internal pressure; an erosion motor connected to the bottom of the mixing container for controlling the speed of the erosion particle feed; a water supply line attached to the top of the mixing funnel to supply fresh water to maintain an optimal sludge concentration, the water supply line being connected at its other end to a water tank and a high-pressure water pump being integrated into the water supply line to transfer water from the water tank to the mixing funnel while passing through a filter in the water tank; a mixing chamber which is functionally connected to the pressurized mixing funnel as a homogeneous suspension flow channel; a test chamber unit connected to the mixing chamber, wherein the test chamber unit includes a pressure nozzle and a sample holder as an integrated assembly, the pressure nozzle being positioned to generate a high-speed suspension jet, and the sample holder being configured to fix a test specimen at a fixed distance and adjustable angle with respect to the nozzle outlet; a sludge container arranged below the test chamber for collecting the sludge consumed after sample impact, wherein a high-pressure sludge recirculation pump is connected to the sludge container via a pipeline to draw in the consumed sludge and return it to the pressurized mixing vessel, thus creating a closed circuit; and a control unit configured to allow control of the sludge jet velocity, the angle of impact on the sample, the speed of the erosion motor, the speed of the high-pressure sludge recirculation pump, the speed of the high-pressure water supply pump, and the duration of the test procedure.

The invention discloses a control method of an air curtain dust isolation system for an open channel of a dressing plant workshop, and the control method comprises the following steps: S1, controlling the airflow jet velocity of an air blowing device to be V0, s2, the flow Q blowing of the blowing device is calculated according to the airflow jet velocity V0 of the blowing device in the step S1, Q blowing meets the condition that the gas flow is controlled by controlling the gas jet velocity of the blowing device of the air curtain dust isolation system, a stable blowing and suction air curtain is effectively formed for different workshop hoisting channels of the gyratory crushing station, and the service life of the air curtain dust isolation system is prolonged. Soft sealing dust isolation on the two sides of the hoisting channel is achieved, and the functions of isolating and purifying dust in the hoisting channel are achieved.

The application discloses a method for optimizing linear jet velocity uniform distribution of a multi-jet orifice straight pipe gas distributor, an auxiliary pipe is arranged in a main pipe, and the following optimization design variables are used: an axial interval of adjacent jet orifices of the auxiliary pipe, a jet orifice diameter of the auxiliary pipe, a jet orifice number of the auxiliary pipe, a main pipe inclination angle, an interval between a main pipe inlet end and an auxiliary pipe inlet end, and a center distance between the main pipe and the auxiliary pipe; under the constraint that an error between a main pipe inlet mass flow and a total sum of mass flows of all jet orifices is less than an error threshold, linear jet velocities at all jet orifices in the main pipe are corrected, so that the coming flow gas is subjected to pressure redistribution at all jet orifices in the main pipe, and the structure optimization design of the straight pipe gas distributor with uniform linear jet velocity distribution at all jet orifices is realized. The linear jet velocity distribution uniformity of the multi-jet orifice straight pipe gas distributor optimized by the application is significantly improved, and cell culture damage and death or leakage phenomena in a bioreactor can be reduced or basically eliminated.

A method and processing chamber for plenum driven hydroxyl combustion oxidation. A mixture is produced in a plenum. The mixture includes a first reactive gas injected from a first inlet and a second reactive gas injected from a second inlet. The mixture is injected towards a substrate of a processing chamber at a jet gas velocity greater than a flame gas velocity. A radical is produced as a function of the first gas and the second gas while heating the chamber.

This invention discloses a jet flotation column and flotation method for fine-grained mineral separation, relating to the field of mineral separation technology. It includes a flotation assembly comprising a column, an overflow trough fixed within the column, a spray element disposed at the top of the column, a tailings hopper fixed at the bottom of the column, and a concentrate discharge pipe fixed to one side of the column. A jet assembly is disposed outside the column, including a negative pressure pipe located outside the column, a transmission pipe disposed at one end of the negative pressure pipe, an elastic throat fixed at both ends between the negative pressure pipe and the transmission pipe, and a diffuser connected at one end to the transmission pipe. This invention, through the linkage of the elastic throat, displacement block, positioning wheel, movable strip, and guide frame, allows the throat flow area to automatically adjust with pressure fluctuations in the transmission pipe, stabilizing the jet velocity and microbubble generation quality. Simultaneously, it automatically matches the flow rates of the liquid supply pipe and air supply pipe to pressure changes, maintaining a balanced ratio of slurry, reagents, and air, thereby improving separation accuracy and recovery rate.

The application provides a control method and device of an air conditioner and the air conditioner. The method comprises the following steps: acquiring a current temperature in a room, and determining a set temperature of the air conditioner corresponding to the current temperature; determining a first air conditioner jet flow adhesion length and a first air conditioner jet flow speed according to the set temperature, wherein the air conditioner jet flow adhesion length is a length of air flow adhesion of a ceiling of the air conditioner, and the air conditioner jet flow speed is a speed of air flow emitted by the air conditioner; calculating a first axial center speed attenuation coefficient according to the set temperature, the first air conditioner jet flow adhesion length and the first air conditioner jet flow speed, wherein the axial center speed attenuation coefficient represents a degree of attenuation of a center speed of air flow of the air conditioner; determining a first target opening angle according to the first axial center speed attenuation coefficient, and controlling an opening angle of a louver of the air conditioner to be the first target opening angle, wherein the opening angle of the louver is a size of an angle at which the louver of the air conditioner is opened. Through the application, the problem of uneven air flow diffusion of the air conditioner in the prior art is solved.

The utility model discloses a Y type diversion three-way pipe joint relates to pipeline joint technical field, including main branch pipe and two shunt branch pipe that distribute symmetrically, main branch pipe center is fixed installation guide plate, the plate surface of guide plate is equipped with two rows of guide hole, and the inner end of guide plate is equipped with guide slope corresponding to two shunt branch pipe, and the guide slope is equipped with the main branch pipe and the shunt branch pipe. A plurality of flow guide grooves are evenly formed in the flow guide slope, through the flow guide slope, the sharp edge of the water flow outlet is kept so as to maintain the jet flow speed, the impact force of water flow on the pipe wall is reduced, turbulence energy is reduced, and the vibration amplitude of the pipeline is reduced. In addition, the flow guide plate can effectively guide the fluid to be evenly distributed into the two flow distribution branch pipes along the flow guide holes and the flow guide slopes, stability and uniformity of the fluid in the flow distribution process are guaranteed, local negative pressure and turbulent flow are avoided, and therefore pressure head loss is obviously reduced, and pipeline conveying efficiency is improved.

GAS TURBINE ENGINE The present invention relates to a gas turbine engine for an aircraft and a method of operating a gas turbine engine on an aircraft. Illustrative embodiments described include a gas turbine engine (10) for an aircraft comprising: a central core (11) including a turbine (19), a compressor (14) and a central shaft (26) connecting the turbine to the compressor; a fan (23) located upstream of the central core (11), the fan comprising a plurality of fan blades; a nacelle (21) surrounding the central core (11) and defining a bypass duct (22) and a bypass exhaust nozzle (18);and a gearbox (30) which receives an input from the central shaft (26) and delivers an output drive to the fan (23) so as to drive the fan (23) at a lower rotational speed than the central shaft (26), in which the gas turbine engine (10) is configured such that a jet velocity ratio of a first jet velocity exiting the bypass exhaust nozzle (18) to a second jet velocity exiting an exhaust nozzle (20) of the central core (11) at idle conditions is greater by a factor of about 2 or more than the jet velocity ratio at maximum takeoff thrust conditions. [Figure 1];

The invention discloses a hydraulic valve flow soft measurement method for on-line prediction of abrasion loss, which comprises the following steps of: acquiring operation data of a hydraulic valve under different working conditions as input characteristics, and training a neural network soft measurement model; predicting the valve port flow according to the trained flow soft measurement model and the hydraulic valve operation data collected in real time; calculating the effective through-flow area of a valve port, the average speed of a nozzle and the mass flux of particles in unit area; the particle impact probability is calculated according to the particle impact characteristics, the total abrasion loss is distributed to the valve seat edge and the valve element edge according to the particle impact probability, and the erosive abrasion rate is calculated; and outputting the valve port abrasion loss according to the erosive wear rate, updating the valve port overflowing area according to the valve port abrasion loss, and calibrating the flow soft measurement model on line. The valve port abrasion can be estimated in real time, the full-period flow change can be tracked, performance degradation caused by abrasion can be recognized in time, predictive maintenance and fault diagnosis are supported, the failure risk caused by excessive abrasion is reduced, the flow control precision is improved, and the service life of equipment is prolonged.

The present invention provides a digital liquid ejection apparatus for textiles and related apparatus and methods, the apparatus comprising: an ejection system comprising a liquid ejection assembly comprising a perturbation actuator, a liquid supply system configured to eject a liquid jet at an adjustable jet velocity, periodic disturbance is applied to the liquid jet flow at an adjustable disturbance frequency; the control system is in communication connection with the liquid supply system, the relative movement mechanism and the disturbance actuator and is configured to respond to a control instruction and operably select at least two jet flow forms, the jet flow forms comprise a first jet flow form, the control system sets a first control parameter combination, and the second jet flow form comprises a second control parameter combination; enabling the disturbance wavelength determined by the ratio of the jet velocity to the disturbance frequency to be within the corresponding optimal fracture window; and in the second jet flow form, the control system sets a second control parameter combination, so that the disturbance wavelength determined by the ratio is outside the optimal fracture window.

The invention discloses a flameless combustion system and its control method. The system comprises a furnace body, a top cover, an accelerating combustor and a main fuel nozzle. The accelerating combustor comprises an accelerating chamber and a combustor. The combustor comprises a fuel inlet pipe, an oxidant inlet pipe, a core pipe, a conical bluff body and an igniter. The special design of the accelerating combustor can preheat the oxidant and accelerate the oxidant by thermal expansion, effectively avoid the phenomenon that the temperature of the central jet area is low due to the entry of cold oxidant, greatly improve the temperature uniformity in the furnace, and also improve the jet speed of the oxidant after entering the furnace to meet the requirements of flameless combustion, effectively reduce the pressure and load of the oxidant delivery system. The system also has the characteristics of simple structure, convenient operation, stable oxygen-free combustion state and uniform temperature distribution in the furnace. The matching control method has the advantages of short control process and high control precision.

The present application relates to the technical field of industrial furnace control and efficient combustion, and discloses a distributed heat energy distribution process in the dry heat treatment stage of resin sand mold, which comprises the following steps: dividing a heating chamber into spatially independent combustion distribution intervals, determining an initial heat load distribution ratio according to the heating area and thickness parameters of the sand mold in each interval to adjust the fuel flow, and dynamically correcting the fuel flow according to the exhaust gas temperature change rate; when the fuel flow is lower than 50% of the calibrated flux, reducing the valve opening degree, linkage adjusting the cross-sectional area of the inner annular flow channel of the burner to maintain the jet velocity and adjusting the outer ring air supply pressure to maintain the total jet momentum, so that the problems of flame blowout and incomplete combustion loss caused by kinetic energy attenuation under low fuel flux are solved, and the cracking risk caused by uneven temperature rise of the sand mold is eliminated.

The application discloses a kind of concrete structure damage effect collection devices based on shaped charge jet blasting, including test pier, concrete base block, sensor group;Wherein test pier includes shell and the concrete structure that is poured in shell, concrete base block is same with concrete structure material, linear distribution in concrete structure, as the carrier of sensor, ensure that when external shaped charge blasting device explodes, the blasting performance of blasting device is correctly reacted;The present application is provided with velocity measurement screen target on the upper and lower end surface of concrete base block, the signal generated by each layer of screen target is used to judge the penetration depth of shaped charge blasting device in concrete structure and the change of jet velocity, which is beneficial to judge the jet penetration depth and velocity of shaped charge blasting device at different blasting height.

The invention relates to the field of ocean engineering and flow control, in particular to a jet device control method and system for controlling wave-surface wake of an underwater vehicle based on synthetic jet. Wave wake state information obtained by processing a wave picture shot by a camera is mainly used for controlling the hole diameter of a water spraying hole, the water spraying flow speed, the water spraying frequency and the jet flow direction, so that the optimal inhibition effect on the wave wake is achieved. According to the method, the wave surface wake caused when the aircraft executes an underwater task can be effectively eliminated, and the concealment and the safety of the aircraft are improved. And meanwhile, a technical reference is provided for the concealment optimization design in the navigation of the vehicle. According to the scheme, through fusion of dynamic wave measurement, synthetic jet excitation and a nonlinear control algorithm, full-period suppression of the wakes of the induced wave surface of the underwater vehicle is achieved, and the method has more advantages compared with a traditional wave absorbing mode.

This invention belongs to the field of large-span bridge vibration excitation technology, and discloses a low-frequency, large-amplitude vibration excitation device for long-span bridges. This invention generates periodic vertical forces by controlling the direction and timing of water pump jets, providing a controllable vertical load to the bridge, thereby exciting large-amplitude vertical or torsional vibrations. By designing the water tank capacity, number of water pumps, nozzle diameter, and jet velocity, and employing a multi-nozzle parallel connection and phase control strategy, the jet force and water flow return force are optimized, significantly reducing system power, installation difficulty, and cost while achieving efficient excitation. Compared with existing technologies, this invention's low-frequency, large-amplitude vibration excitation device for long-span bridges does not require complex mechanical frequency tuning and actuators, is small in size, easy to assemble and disassemble, and has a flexible and adjustable control system that can quickly adapt to different vibration modes and frequency conditions of the bridge, demonstrating significant engineering application prospects and promotional value.

This invention provides an adaptive adjustment intelligent jet pump and its method. The adaptive adjustment intelligent jet pump includes a connecting pipe, a nozzle, a suction chamber, a mixing chamber, and an expansion pipe connected in sequence. The other end of the connecting pipe is fixedly connected to the output end of the jetting device. A rotary drive component is fixed on the outside of the suction chamber. A variable length jetting assembly for adapting to changes in steam flow is rotatably arranged inside the mixing chamber. Multiple rotating blades are rotatably arranged inside the variable length jetting assembly. Each of the multiple rotating blades has an elastic telescopic component on its surface. One end of the variable length jetting assembly is detachably connected to one end of the rotary drive component. The adaptive adjustment intelligent jet pump and its method provided by this invention solve the problems of insufficient jet velocity or excessive diffusion that occur in traditional steam jet pumps due to the fixed nozzle structure when the steam flow deviates from the design value due to insufficient boiler fuel supply or a sudden increase in process demand.