35 results about "Supercavitation" patented technology

The invention provides a three-dimensional numerical simulation method and system for supercavitation projectile high-speed inclined water discharge, and the method comprises the steps: building a three-dimensional geometric model of a projectile and a flow field computational domain, and outputting projectile body attribute parameters; estimating the size of a projectile body motion area, performing grid division on the projectile body and a flow field calculation domain, importing fluid solving software, establishing an overlapping calculation domain, and setting projectile attribute parameters and fluid solver boundary conditions; the influence of compressibility of water on the high-speed projectile is considered, a user-defined function is adopted, and the nonlinear relation between the density and the pressure of the compressible liquid under the isothermal condition is established; initial motion parameters of the projectile are defined, numerical solution is carried out, and cavitation evolution, flow field distribution, stress and motion characteristics in the water outlet process of the high-speed inclined projectile are obtained. According to the invention, the high-speed inclined water outlet process of the projectile under different working conditions can be simulated, the cost can be effectively reduced, and a technical basis is provided for a submarine launching test.

The invention relates to a supercavitation navigation body small-angle water outlet scale model test device and method, and the device comprises a power system, a platform height lifting system, an initial water outlet angle adjustment system, a water surface evacuation system, a wave generation system, a line target speed measurement system, and a model recovery system, and the power system is used for launching a navigation body model; the platform height lifting system is used for adjusting the height; the initial water outlet angle adjusting system is matched with the platform height lifting system to adjust the initial water inlet angle of the navigation body model; the water surface vacuumizing system is used for vacuumizing the water tank; the wave making system is used for making a wave water surface; the line target speed measurement system is used for measuring the speed of the navigation body model; the model recovery system is used for recovering the navigation body model. According to the invention, the depth adjustment of the initial water depth and the angle adjustment of the preset water outlet angle are realized when the navigation body moves underwater, the simulation of wave sea conditions can be realized, and the physical phenomena such as supercavitation form and trajectory instability of a cross-domain gas-water interface in the underwater movement process of the navigation body can be recorded.

The invention belongs to the field of underwater vehicles, and particularly relates to a cooling structure, a cooling method and a supercavitation vehicle. The cooling structure comprises a water inlet channel arranged on the head cavitator, an air entraining pipeline channel wrapping the outer wall of an air entraining pipeline, a transition channel, an engine main body channel wrapping the outer wall of a main body of the engine and an exhaust nozzle channel wrapping the outer wall of an exhaust nozzle which are sequentially communicated. According to the cooling structure provided by the invention, the water inlet channel is arranged on the head cavitator, the air entraining pipeline channel is coated on the outer wall of the air entraining pipeline, the engine main body channel is coated on the outer wall of the engine main body, and the exhaust nozzle channel is coated on the outer wall of the exhaust nozzle. In the process that water sequentially flows through the water inlet channel, the air entraining pipeline channel, the engine body channel and the exhaust nozzle channel, heat exchange cooling is sequentially conducted on the head cavitator, the air entraining pipeline, the outer wall of the engine body and the outer wall of the exhaust nozzle.

The present invention provides a water tunnel-based attitude control device for a hydrodynamic wing swing model. The water tunnel connection portion enables the test device and corresponding counterweight to rotate about a rotation axis within a limited angle range. This allows for flexible simulation of the pitch attitude changes of the hydrodynamic wing swing model during supercavitation navigation during water tunnel testing. The designed power output portion precisely drives the rudders of the test device to rotate, thereby controlling lift and adjusting the model's attitude. The data acquisition system utilizes data from multiple sensors to not only achieve closed-loop control of the model's attitude but also, combined with collected image data, perform comprehensive analysis of flow fields and rudder dynamics. Furthermore, the device provided by the present invention offers significant advantages over existing technologies in terms of cost and size.

The invention discloses a supercavitation vehicle effluent trajectory prediction method based on BO-FNN. The method comprises the following steps: step 1, constructing a CFD basic mathematical model; 2, based on the mathematical model, boundary condition setting and mesh generation are carried out on the external flow field of the aircraft, and a simulation model is obtained; 3, verifying the simulation model to obtain a numerical model of the water outlet process; 4, an orthogonal test is designed, and a water outlet trajectory data set is obtained according to the numerical model; step 5, designing a feedforward neural network, and fitting the water-out trajectory data set to obtain a water-out trajectory prediction model presenting an over-fitting characteristic; and step 6, optimizing the water outlet trajectory prediction model to obtain a supercavitation vehicle water outlet trajectory prediction model based on the BO-FNN. According to the supercavitation aircraft water outlet trajectory prediction method based on the BO-FNN, the problems that the supercavitation aircraft water outlet process is high in nonlinearity, and prediction cannot be carried out under the multivariable coupling condition are solved.

The invention provides a nanobubble generating device. The nanobubble generating device comprises a front shell, an impeller, a rotational flow device, an air-permeable component and a rear shell, a liquid inlet is formed in one end of the front shell, the other end of the front shell is connected with the rear shell, and an air inlet is formed in the wall surface of the front shell; an impeller is mounted in an inner cavity of the front shell; the impeller is internally provided with a gas flow channel, the gas flow channel is communicated with the gas inlet, part of outlets of the gas flow channel are located on the surfaces of the blades generating the supercavitation bubbles, and the supercavitation bubbles collide with bubbles of part of the outlets; the other part of outlets of the gas flow channel are communicated with the breathable component; a plurality of second air holes are formed in the surface of the air-permeable component in the rear shell; a rotational flow device is arranged in the front shell or the rear shell and used for enabling the liquid to rotate, and then gas flowing out of the second gas holes is sheared on the surface of the breathable component. According to the invention, a large amount of nano-scale bubbles can be generated.

The application provides a supercavitation projectile cross-medium water entry interference suppression method based on optimization of a cymbal length, comprising the following steps: S1, establishing a projectile-cymbal parameterized model, and demarcating an optimization interval of the cymbal length; S2, coupling a multiphase flow model, a cavitation model and a dynamic grid method to simulate a separation process of the projectile and the cymbal, and obtaining original data of the projectile; S3, performing comparative simulation of multiple groups of different cymbal lengths, and quantitatively extracting three key performance indexes of a supercavity symmetry, a pitch angle deviation and a speed attenuation rate by using the original data of the projectile; and S4, establishing a multi-target optimization criterion based on an interference index, determining a globally optimal cymbal length parameter, and completing the whole optimization process. The application can solve the problem caused by improper design of the cymbal length when the supercavitation projectile and the cymbal cooperatively enter water.

The invention relates to a supercavitation navigation body water tunnel test high-temperature air supply system and an operation method, the supercavitation navigation body water tunnel test high-temperature air supply system comprises an air source supply processing device, the output end of the air source supply processing device is connected in series with a first-stage pressure reducing valve and a second-stage pressure reducing valve through a pipeline, the output end of the second-stage pressure reducing valve is connected with a buffer air cylinder, and the top of the buffer air cylinder is provided with a safety valve; the output end of the buffer gas cylinder is divided into two paths, one path is connected with an electric heater through a mass flow controller and a first one-way valve, and the other path is communicated with a three-way pneumatic electromagnetic valve through a gas tank pressure reducing valve; the output end of the electric heater is further communicated with a three-way pneumatic electromagnetic valve through a check valve, the three-way pneumatic electromagnetic valve is divided into two branches again, one branch is communicated with an outlet water tank through a second one-way valve, and the other branch is communicated with a test water tunnel outlet pipeline through a third one-way valve. The water tunnel test of air source state adjustment can be completed in a high temperature range of 0-600 DEG C, and the use requirement is met.

The application belongs to the field of underwater vessels, and particularly relates to an underwater unmanned vehicle. In order to enable the underwater unmanned vehicle to navigate at a high speed and have good self-stability, the application discloses an underwater unmanned vehicle. The underwater unmanned vehicle comprises a front cabin section, a turning section and a rear cabin section, the turning section comprises a front connecting piece and a rear connecting piece, the front connecting piece and the rear connecting piece are respectively provided with front perforations and rear perforations, the front cabin section is provided with at least two jet spouts, the rear cabin section is provided with a cavitation generator, the cavitation generator is connected with a gas guide pipeline, and the front end of the gas guide pipeline is connected with the jet spouts, so that when the cavitation generator is started, high-pressure gas in the cavitation generator is sprayed out from all the jet spouts to form a supercavitation, thereby improving the maximum navigation speed of the underwater unmanned vehicle. By placing the cavitation generator at the rear, the distance between the center of mass and the center of buoyancy can be increased, thereby improving the self-stability of the underwater unmanned vehicle when navigating underwater.

The present invention belongs to the technical field of low-temperature resin preparation, and is particularly a bionic robot of anti-sky knife fish. In view of the problem that the current large underwater vehicles such as submarines are extremely difficult to turn around due to the great movement resistance, the following scheme is proposed, including an overall shell of an overall bionic anti-sky knife fish, the outer wall of the overall shell is smoothed, the overall shell is divided into a head, a middle body and a tail, and both sides of the head of the overall shell are provided with observation ports, and the end of the head of the overall shell away from the middle body is sleeved with a supercavitation generator. In this embodiment, the supercavitation generator is a bubble ring sleeved on the mouth, and the bubble ring is located on the side of the robot forward and has strip jet holes distributed at equal distances. The present invention can turn around in a small space through a side propulsion device arranged on the side, avoiding the disadvantage that traditional large-scale aircraft need to turn around in a large circle before turning around.

This invention discloses a method for designing ventilation parameters for a supercavitating vehicle. Referring to the vehicle's shape and speed, the required ventilation volumetric flow rate for generating a suitable cavitation bubble size is calculated using the ventilation rate formula. The gas density inside the bubble is determined based on the environmental pressure and required cavitation number. The combustion surface of the solid propellant grain in the gas generator is designed in conjunction with fuel characteristics. Supercavitating vehicles designed using this invention are launched from underwater UUVs and surface ships, primarily for countering underwater targets. The method of this invention can efficiently obtain the ventilation parameters required for generating the appropriate supercavitation size when the vehicle is operating under variable conditions. Furthermore, through reasonable propellant design, the supercavitation size of the vehicle can be easily changed to adapt to changes in operating conditions. This avoids the problem of the vehicle not being fully covered by a supercavitation size that is too small after changing operating conditions, as well as the waste and even performance degradation caused by a supercavitation size that is too large.

A high-temperature steam supercavitation experimental device and method, belonging to the field of supercavitation experimental technology. The present invention solves the problem that the existing supercavitation experimental device cannot simulate the influence of thermal effects on the generation and development of supercavitation in a deep diving environment. The electromagnetic steam generator is connected to the interior of the supercavitation vehicle through a steam pipeline. A temperature sensor is installed inside the supercavitation vehicle. The pressure regulating system and the speed regulating system are respectively connected to the circulating water tunnel. The test section environmental pressure is controlled by the pressure regulating system, the water flow rate of the test section is controlled by the speed regulating system, and the steam temperature and steam ventilation volume introduced into the supercavitation vehicle are controlled by the electromagnetic steam generator; the experimental data are recorded and processed by a computer. Supercavitation is generated by high-temperature steam ventilation, which reveals the significant influence of thermal effects on the generation and development of supercavitation. The deep diving environment is simulated by experimental means, providing basic technical support for improving the hydrodynamic performance of deep-sea vehicles.

The invention provides a supercavitation ejection empennage bullet. The supercavitation ejection empennage bullet comprises a bullet body, an empennage ejection device and a sliding bullet belt, wherein the bullet body, the empennage ejection device and the sliding bullet belt can be assembled into a projectile; the projectile body is fixedly connected with the empennage through a precise structure; the projectile body is composed of a projectile body head, a projectile body shoulder cylindrical section, an empennage and a projectile body tail. According to the supercavitation ejection empennage bullet, the ejection structure is adopted to protect the empennage in the bullet body when the projectile is launched, damage to the empennage caused by rotation and friction of a wire chamber in the chamber can be avoided, and after the projectile is ejected out of the chamber, the pure mechanical spring driving mechanism is adopted to rapidly unfold the empennage, so that the empennage is not influenced by the launching process and keeps integrity; and after the ejection empennage is unfolded, the effective empennage area is obviously increased, so that the lift force and stability of the projectile flying in the air and underwater are improved, the flight path is improved, the range is prolonged, and the target penetrating capacity is enhanced to a certain extent.

The present disclosure provides a drag reduction device for an amphibious vehicle body using supercavitation for navigation on water. The device includes an exhaust gas collection device, a compressed gas storage device, an expansion unit, a thermostat, a gas delivery assembly, and a supercavitation launch device. The exhaust gas collection device collects and filters the exhaust gas generated by the amphibious vehicle engine, and compresses and stores it in the compressed gas storage device. During use, the gas is pressure- and temperature-regulated by the expansion unit and the thermostat, and then delivered to the supercavitation launch device provided at the bow of the amphibious vehicle body via the delivery assembly. The gas with the required pressure and stable temperature is emitted outward through the holes on the supercavitation launch device, forming supercavitation around the holes for drag reduction. The use of the present invention can reduce the resistance encountered by an amphibious vehicle during navigation on water.

The invention provides a supercavity shell prediction launching system applying a remote sensing technology. The supercavity shell prediction launching system applying the remote sensing technology comprises a submarine, a remote sensing system and a supercavity shell launching system, the remote sensing system comprises a remote sensor, the remote sensor adopts a small platform to carry a synthetic aperture radar, and the supercavity shell launching system carries a supercavity shell launching platform and information processing equipment; the information processing equipment collects environment coordinate information through remote sensing, and the supercavity shell comprises a shell core, a shell shell body and a shell belt. According to the supercavitation shell prediction launching system applying the remote sensing technology, the launching stability of the supercavitation shell is guaranteed, the ballistic instability phenomenon caused by underwater navigation of the shell is avoided, and the stability of the shell in the navigation process is greatly improved; and the accuracy of detecting, identifying and shooting the underwater target navigation body by the system is ensured.

The invention mainly relates to an underwater sound detection system and method based on a supercavitation technology, and aims to realize underwater high-speed navigation and target positioning while ensuring high detection precision. The device comprises two parts, namely a conical cavitator and a cylindrical electronic bin. The conical cavitator is used for generating a stable supercavitation phenomenon, so that the underwater resistance is greatly reduced, and high-speed movement is realized; a receiving and transmitting module is integrated in the hydrophone, and the hydrophone comprises a transmitting transducer and a uniform linear array formed by 16 hydrophone array elements, so that a larger array aperture and high resolution are ensured. And the cylindrical electronic bin undertakes subsequent processing work such as signal conditioning, acquisition, data storage and control and the like. The system adopts an active sound detection mode to realize underwater target positioning, has the characteristics of compact structure, strong maneuverability, high signal-to-noise ratio, excellent anti-interference capability and the like, and is suitable for the fields of ocean observation, target positioning, underwater detection and the like.

The invention discloses a supercavitation vehicle maneuvering navigation dynamic allocation control method considering optimal efficiency, and belongs to the technical field of underwater vehicle control. The method comprises the following steps: establishing an attitude control prediction model of a supercavitation navigation body, and constructing an efficiency evaluation function fusing control precision and control energy consumption; constructing a nonlinear model prediction controller based on the model and the function, and setting a constrained optimization problem and a solving algorithm thereof to complete controller construction; and in each control period, solving an optimization problem through the controller, adjusting a predictive control sequence by using a nonlinear optimization algorithm, and determining optimal allocation by taking the minimization of an efficiency evaluation function as a target to obtain an optimal control sequence. According to the method, the adaptive dynamic distribution of the control instruction among the plurality of execution mechanisms is realized through the NMPC framework, and the problems of low control efficiency and high energy consumption of the supercavitation navigation body in the maneuvering navigation process are effectively solved.

The invention discloses a cross-medium aircraft high-speed water outlet flexible load reduction rectifying device, and relates to the technical field of cross-medium aircraft structure protection. The device conformally wraps the head of the aircraft and sequentially comprises an inner side bonding layer, an anti-static pressure air bag layer, an energy absorption foam layer and an outer side protection layer from inside to outside, underwater collapse is prevented through the internal pressure of preset gas of the anti-static pressure air bag layer, and low-frequency large-displacement buffering is provided through the compressibility of the gas at the water outlet moment; high-frequency impact is absorbed through deformation of the energy-absorbing foam layer, and transition from a blunt-end inner shape to a pointed-end outer shape is achieved. And supercavitation is formed through the streamline shape, so that the water outlet resistance is reduced. Through the material, shape and thickness design of each layer, water outlet resistance reduction and pressure resistance keeping in a deep water environment and efficient buffering at the water outlet moment are achieved, the underwater launching success rate is effectively increased, and precise instruments at the head of an aircraft are protected.

This invention discloses a high-temperature variable-component gas supply system for ventilated supercavitation water tunnel experiments, including a gas source module, which is sequentially connected to a heating module and a gas distribution module via pipelines. It also includes a data acquisition module, with the gas source module and heating module connected to the data acquisition module via signal lines. This invention also discloses an operation method for the high-temperature variable-component gas supply system. This invention solves the problem in existing water tunnel ventilated supercavitation experiments that it is impossible to simultaneously generate, regulate, and supply high-temperature variable-component gas containing condensable phases.

The invention discloses a supercavity form evolution characteristic dimensionality reduction analysis method based on principal component analysis, and relates to the technical field of ship and ocean engineering. In order to solve the defects that in the prior art, supercavity high-dimensional evolution data is difficult to process efficiently, an objective dimension reduction extraction means is lacked, and correlation analysis of principal component and physical evolution characteristics cannot be realized, the technical scheme provided by the invention is as follows: a supercavity form evolution characteristic dimension reduction analysis method based on principal component analysis is provided. Comprising the following steps: collecting multi-dimensional feature data in a supercavitation evolution process and carrying out normalization processing; performing principal component analysis on the normalized feature data, and extracting a plurality of previous principal components for dimension reduction; and a step of constructing a principal component visualization model and analyzing the physical meaning corresponding to the principal component. The device is suitable for supercavitation drag reduction research of underwater high-speed navigation bodies.

The present invention discloses a missile exit-water load reduction and stabilization device based on the supercavitation principle, belonging to the field of high-speed missile exit-water load reduction and stabilization. The present invention primarily comprises a top air jet device and a side air jet device. Multiple sets of side air jet devices are arranged equidistantly along the sides of the missile and around its circumference. The present invention utilizes a hydrolysis reaction of a reactant to generate a large amount of gas that envelops the missile head, thereby reducing the effects of uneven loads on the missile before exiting the water. This reduces the load and stabilizes the missile during exiting the water, improving the missile's accuracy in striking targets. The top and side air jet devices utilize the hydrolysis reaction of the reactant to envelop the missile head in gas, eliminating the need for cumbersome missile modification, resulting in low modification costs and no significant damage to the missile structure. Furthermore, the gas generated by the top and side air jet devices, in conjunction with each other, covers a large area of ​​the missile head at a high enveloping speed, improving the missile's adaptability to transient changes before exiting the water.

A supercavitation-enhancing paint formulation is disclosed for reducing hydrodynamic drag in underwater applications. The coating comprises a hydrophobic base, nano-additives for cavitation promotion, friction-reducing polymers, and gas-releasing agents. The formulation facilitates vapor layer formation around high-speed objects, improving propulsion efficiency. The paint is applied via a multi-layer process and heat-cured to enhance durability. This innovation enables sustained supercavitation without mechanical modifications, improving performance for underwater vehicles and projectiles.

The invention discloses a navigation body tail beat force forecasting model construction method based on a physical test system, relates to the technical field of supercavitation navigation bodies, and provides a direct navigation high-frequency swing physical test device for a prototype motion test of a supercavitation navigation body scale model. According to the direct-navigation high-frequency swing physical test device, tail beat characteristic parameters are obtained based on a prototype motion test, tail beat physical simulation tests under different test parameters can be rapidly carried out to obtain a tail beat force test result, and then a tail beat force prediction model is constructed based on the idea of data driving by utilizing physical simulation test data. Compared with a theoretical formula model, the constructed tail beat force forecasting model is closer to an actual physical scene, so that the tail beat force can be forecasted more accurately, and a better motion posture effect can be obtained by utilizing a control strategy verified by the tail beat force forecasting model in the actual high-speed operation of the underwater navigation body.

The invention discloses a dual-ventilation supercavity experimental model capable of continuously adjusting spacing and a use method thereof, and relates to the technical field of water tunnel experimental equipment. The problems that an existing supercavitation experiment model cannot continuously adjust the parallel model distance, and due to discrete distance adjustment, cavitation coupling mechanism research is incomplete, and critical state capture is not accurate are solved. The device comprises a spacing-adjustable base and two groups of ventilation models which are mounted at the upper end of the spacing-adjustable base and are arranged in parallel, a cavitator is mounted at the rear end of a multidirectional connection supporting system in each group of ventilation model, and a flow stabilizing assembly is mounted at the front end of the multidirectional connection supporting system; the lower ends of the multi-direction connection supporting systems of the two ventilation models are connected with the two rotating parts in the distance-adjustable base correspondingly, and continuous adjustment of the distance between the two ventilation models is achieved. According to the cavitator, the cavitation coupling critical state can be accurately captured by uniformly distributing the ventilation micropores in the cavitator head in the circumferential direction and combining the independent adjustment function of the double models. The method is mainly used for double-ventilation supercavitation research.

The invention belongs to the field of underwater vehicles, and particularly relates to a supercavitation vehicle and a sailing method.The supercavitation vehicle comprises an engine and a front-section shell which are sequentially arranged, an air entraining pipeline is arranged at the front end of the engine, and a side wall connecting pipe penetrating through the side wall of the front-section shell is arranged at the end of the air entraining pipeline; a head cavitator is arranged at the front part of the front-section shell; the water inlet channel, the air entraining pipeline channel, the transition channel, the engine main body channel and the exhaust nozzle channel are communicated in sequence; the exhaust nozzle channel comprises a plurality of branch channels which are arranged in an annular array around the axis of the exhaust nozzle, the tail ends of the branch channels are led out of the wall face of the diffusion section, and each branch channel is provided with a main control valve. According to the invention, in the navigation process of the supercavitation vehicle, water in front of the navigation of the supercavitation vehicle is directly drawn to carry out comprehensive effects of cooling, thrust increasing and thrust vector control on the supercavitation vehicle.

The invention discloses a response prediction method for a ventilation supercavity flow pattern in a navigation depth change process. The method comprises the following steps: step 1, constructing a mathematical model; 2, on the basis of the mathematical model, boundary condition setting and mesh generation are carried out on the watershed of the aircraft, and a numerical calculation model is obtained; 3, verifying the numerical calculation model to obtain a ventilation supercavitation numerical calculation model suitable for the variable navigation depth condition; and 4, based on the supercavitation numerical calculation model, performing simulation calculation on the ventilation supercavitation flow field under the variable navigation depth condition to obtain a simulation result. According to the response prediction method for the ventilation supercavity flow pattern in the navigation depth change process, the problem that the flow pattern change and response of the cavity in the navigation depth dynamic change process of the supercavity vehicle cannot be predicted in the prior art is solved.

The utility model relates to the technical field of supercavitation resistance reduction of underwater vehicles, in particular to a preposed cavitation control device based on supercavitation technology, which comprises a cavitator, the right end of the cavitator is fixedly connected with an outer-layer cone section body, an embedded cone section sleeve I is arranged in the outer-layer cone section body, a ventilation sleeve is arranged in the embedded cone section sleeve I, and the ventilation sleeve is fixedly connected with the outer-layer cone section body. A gas temporary storage device is arranged at the right end of the ventilation sleeve, a gas pump is arranged at the tail end of the gas temporary storage device, and the ventilation sleeve is fixedly connected with the cavitator, the outer-layer conical section body, the first embedded conical section sleeve and the gas temporary storage device; the cavitation device, the outer-layer conical section body, the embedded conical section sleeve and the gas temporary storage device are connected through the ventilation sleeve, gas generated by the gas pump can be conveyed to the gas cavity in the middle of the double-layer structure of the cavitation device and the embedded conical section sleeve through the gas temporary storage device and the ventilation sleeve, and therefore gas temporary storage is achieved, and gas output is facilitated.

The invention belongs to the field of underwater naval vessels, and particularly relates to an underwater unmanned vehicle. In order to enable the underwater unmanned vehicle to sail at a high speed and have good self-stability, the invention discloses the underwater unmanned vehicle. The underwater unmanned vehicle comprises a front cabin section, a steering section and a rear cabin section, the steering section comprises a front connecting piece and a rear connecting piece, the front connecting piece and the rear connecting piece are provided with a front through hole and a rear through hole respectively, the front cabin section is provided with at least two jet flow nozzles, a cavitation generator is arranged in the rear cabin section and connected with an air guide pipeline, and the air guide pipeline is connected with the jet flow nozzles. The front end of the gas guide pipeline is connected with the jet flow nozzles, so that when the cavitation generator is started, high-pressure gas in the cavitation generator is sprayed out from all the jet flow nozzles to form supercavitation bubbles, and the maximum navigational speed of the unmanned underwater vehicle is increased. By postposition of the cavitation generator, the distance between the center of mass and the center of buoyancy can be increased, so that the self-stability of the underwater unmanned vehicle during underwater navigation is improved.

The application relates to a supercavitation vehicle cavitator rudder structure, a vehicle and a control method. The cavitator rudder is arranged at the front end of the vehicle, the whole flow surface is wet, and stable and clear steering torque is provided for the vehicle. The first rotating shaft and the second rotating shaft are arranged orthogonally, the cavitator rudder movement is decomposed into independent yaw and pitch dimensions, the driving mechanism one 5 and the driving mechanism two 6 independently drive corresponding channels respectively, movement interference is eliminated, and steering actions can be executed independently or synchronously. The structure replaces the traditional tail rudder, and tail flow field interference and additional navigation resistance are avoided.

The invention belongs to the technical field of supercavitation projectile design, and particularly discloses a truncated-cone-shaped supercavitation projectile design method which comprises the specific steps that a cavitation contour line is calculated and verified; calculating a projectile speed attenuation rule and solving projectile quality according to a target range; designing a preliminary outline of the supercavitation projectile; according to the cavitation contour line, the initial shape contour of the projectile is optimized; and according to the quality requirement, the projectile shape contour of the projectile cone section is adjusted, and then projectile contour design is completed. Compared with the prior art, cavitation bubbles generated by the cavitator can completely wrap the projectile, so that the underwater trajectory of the projectile is stable, and the effective firing range of the projectile is increased; meanwhile, a large amount of CFD simulation in the design process is avoided, and the design work and time are saved to a greater extent.