130 results about "Shock tube" patented technology

The invention discloses an underwater explosion impact equivalent loading test device and method, and belongs to the technical field of dynamic impact test mechanics, the underwater explosion impact equivalent loading test device comprises a light gas gun system, a combined water shock tube system and a measurement control system, the light gas gun system is a shock wave load loading system of a water shock tube, and the combined water shock tube system is connected with the measurement control system. Comprising a piston, a working table support, a steel pipe, a pressure sensor, a connecting flange, a connecting assembly, a transparent pipe, a double-thread screw assembly, a front panel, a test sample, a rear panel, a working table fixing support and a working table top, and a measurement control system comprises a light gas gun pressurization and emission controller, a high-speed acquisition instrument, a first high-speed camera and a second high-speed camera. The underwater explosion impact equivalent loading test device and the underwater explosion impact equivalent loading test method are compact in structure, convenient to use and suitable for researching underwater dynamic impact protection performance and fluid-solid coupling mechanism of materials or structures in laboratories.

The invention discloses a high-temperature and high-pressure multifunctional integrated shock tube test system, belongs to the technical field of explosion and impact dynamics tests, and aims at solving the problem that an existing shock tube is usually single in function and is only used for a simulation test of a certain function. The high-pressure section and the low-pressure section of the shock tube are both made of high-temperature-resistant nickel-based alloy, an induction heater is adopted for heating, high-pressure inert gas is filled into the high-pressure section through pressure gradients of diaphragm sets with different layers of diaphragm clamping sections, high temperature and high pressure of the high-pressure section at the temperature of 20-900 DEG C and the pressure of 0.1-50 MPa are obtained, and the high-pressure shock tube has the advantages that the high-pressure shock tube is compact in structure and low in cost. The multifunctional integrated shock tube test system can be used for researching the crushing characteristics of rock materials under the conditions of different pressures, temperatures, water contents and the like, the damage characteristics of explosion shock waves in the air to a target piece and the impact damage characteristics of a high-speed projectile body. Effective methods and means are provided for related research, and the shock tube test technology and engineering application capability are expanded. The test system is easy to implement, low in cost and multipurpose.

The invention discloses a shock wave heat loading high-temperature wind tunnel and a test method, and relates to the technical field of high-temperature wind tunnel test equipment. The shock wave heat loading high-temperature wind tunnel comprises a shock tube, a wind tunnel test system, a pressure acquisition system and an air intake and exhaust system; a high-temperature and high-pressure gas source is obtained in a secondary shock wave reflection heating mode, and the total temperature of the obtained heating gas source is higher; the high-temperature wind tunnel realizes gas heating and pressurization completely through shock wave flow, extra electric power and gas requirements are not needed, and the cost of a single test is lower; the high-temperature wind tunnel test gas is premixed, so that the components of the test gas can be accurately controlled, and the purity of the components of the test gas is ensured; the device can obtain a high-temperature high-pressure subsonic flow field and even a supersonic flow field covering wide-range working conditions, can be used for visualization test diagnosis of spray fuel atomization and spontaneous combustion processes under high-temperature crosswind, accurately characterizes physical and chemical characteristic parameters such as fuel atomization characteristics, self-ignition characteristics, flame propagation characteristics and the like, and has a wide application prospect. And test data support is provided for engine combustion chamber spray atomization combustion organization.

The invention relates to an inter-stage thermal separation equivalent simulation test method based on explosion impact, and belongs to the technical field of tests. According to a mass and energy conservation equation, an initial corresponding relation between # imgabs0 # and flow parameters is established; the advanced corresponding relation between the # imgabs1 # and the flow parameters is obtained; establishing a calculation formula of the # imgabs2 # and the # imgabs3 #; establishing a relation equation for equivalently replacing combustion of the rocket engine with explosion of the explosion shock tube; solving unknown parameters in the relation equation according to the relation equation of equivalently replacing combustion of the rocket engine with explosion of the explosion shock tube, and adjusting the parameters according to a solving result to realize a jet flow effect generated by equivalently replacing combustion of the rocket engine with explosion of the explosion shock tube; according to the invention, by modulating the initial parameters of the explosion shock tube, equivalence of pulsating pressure effects at different positions in the interstage section is realized in the process of simulating the work of the engine.

The invention relates to the technical field of vibration and noise reduction of shock tube testing devices in the engineering anti-explosion industry, in particular to a gradient design type shock tube vibration and noise reduction device for engineering. Comprising a shock tube, an injection silencing module and a vibration and noise reduction module. The shock tube is connected with the injection silencing module; the vibration and noise reduction module is connected with the injection noise elimination module; the shock tube, the injection noise elimination module and the vibration and noise reduction module are coaxially arranged. According to the gradient design type shock tube vibration and noise reduction device for engineering, airflow and sound wave propagation paths are optimized through gradient design, so that noise and vibration generated in the working process of the shock tube are effectively reduced, and meanwhile the aerodynamic performance and operation efficiency of the shock tube are kept. The vibration and noise reduction module formed by periodically arranged functional units forms an acoustic black hole structure, compared with a traditional method, the acoustic black hole structure has better acoustic and elastic wave control physical characteristics, the propagation speed of shock waves can be effectively reduced, and reflection at the tail end of a boundary is reduced.

The invention belongs to the technical field of shock tunnel tests, and discloses a test device for measuring multiple parameters in a high-enthalpy shock tunnel tube. The multi-parameter measurement test device is installed on a driven section of the shock tube and comprises a front high-pressure transition section, a high-pressure visible section and a rear high-pressure transition section which are sequentially connected from front to back through flanges. The multi-parameter measurement test device adopts built-in circular tube thick-wall optical glass to perform non-contact optical measurement, so that the pressure bearing safety is ensured, and the influence of the change of an inner flow channel on a flow field is avoided; the correction lens is arranged on the outer side of the optical glass, so that the problem of imaging distortion of the circular tube is avoided, and more effective test data is further obtained; meanwhile, the device is combined with a reserved surface laser incidence window, a line laser incidence and receiving interface, a pressure sensor interface and a heat flow sensor interface, is used for measuring multiple parameters such as a wave system structure, components, pressure and heat flow flowing in the shock tube, and has engineering practical value.

The invention discloses a strong-impact high-simulation dummy evaluation system and method. The system comprises a dummy model, a mounting base and a dummy evaluation module, the dummy model comprises a head assembly, a neck assembly, an upper trunk assembly, a left arm assembly, a right arm assembly, a hip assembly, a left leg assembly and a right leg assembly. The mounting base comprises an X-direction adjusting handle, a Y-direction adjusting handle, a Z-direction adjusting handle, a 360-degree rotation adjusting handle and a dial; the dummy evaluation module comprises a data acquisition unit (sensor) and a data analysis and processing unit, and is used for carrying out impact evaluation on the dummy model. The device and the method are suitable for test data acquisition and analysis in scenes such as coal mines, chemical environments, free field explosion impact environments and shock tube tests, and evaluation and testing of human injury conditions and protection effects of protection products (such as protection clothing and protection helmets) in strong impact environments are realized; and different types of sensors can be arranged at different parts of the dummy according to requirements so as to research the injury mechanism and the equipment protection performance.

The invention relates to an explosive wave simulation shock tube auxiliary device and a working method, and provides a large explosive wave simulation shock tube opening sparse wave dynamic elimination device and method in order to solve the problem that the accuracy of a test result is reduced due to the fact that an existing shock tube sparse wave elimination device cannot eliminate interference of sparse waves on the test in real time. The eliminating device comprises an eliminating device body (5) and a feedback control system. The eliminating device is arranged at a tube opening of a low-pressure section of the shock tube. The eliminating device comprises a frame, X fan blades arranged on the frame and Y partition plates vertically arranged, X is larger than or equal to 1, and Y is larger than or equal to 0. The fan blades are arranged in rows, the number of the fan blades in each row is equal, fan blade rotating shafts are arranged on the two sides of each fan blade, each fan blade rotating shaft is connected with one transmission structure, and each fan blade is arranged between every two adjacent partition plates or between one partition plate and the inner side wall of the frame. Each transmission structure and the corresponding fan blade rotating shaft are used for controlling the rotating angle of the corresponding fan blade.

The invention discloses an underwater explosion near-field shock wave indirect measurement device in a limited space, a measurement method and an installation method, belongs to the technical field of explosion shock wave load measurement, and solves the technical problem that near-field shock wave measurement and free-field shock wave decoupling measurement cannot be realized due to direct action of strong shock waves and interference of reflected waves in the prior art. The device is of a shock tube type structure and comprises a measuring structure head round tube, a measuring structure tail round tube, a sensor tail bypass extension round tube, a sensor head bypass extension round tube, an underwater explosion free field sensor, a sensor tail bypass round tube and a sensor head bypass round tube. And the tail part of the underwater explosion free field sensor extends into the sensor tail part bypass extension circular tube, and the head part of the underwater explosion free field sensor extends into the sensor head part bypass extension circular tube. The method is suitable for the field of impact measurement of underwater explosion and can be applied to the field of performance evaluation of underwater explosion sources.