Spark plug type electric ignition coaxial nozzle shearing device

Abstract

The invention provides a spark plug type electric ignition coaxial nozzle shearing device, comprising a coaxial nozzle device and an electric ignition device, wherein the coaxial nozzle device is composed of an oxygen passage nozzle, an upper connecting seat, a lower connecting seat, a combustible gas nozzle, a combustible gas injector and an oxygen injector; and the electric ignition device is composed of a power supply, a control line, a boost control module, a high pressure ignition line, a Y-direction base, an X-direction base, an injector base, an injector fixation chassis, a spark plug,a spark plug support and a Z-direction base. By changing the inner diameter and the outer diameter of the oxygen injector and the combustible gas injector, the speed ratio of different combustible gases and oxygen as well as the combustion rules of the combustible gases in oxygen under different injector thicknesses can be conveniently researched. The spark plug type electric ignition coaxial nozzle shearing device disclosed in the invention has the advantages of reliable ignition, low cost, suitability for repeated ignition and the like, causes no interference on the combustion flow field inthe test process, and is an ideal ignition mode for spark plug type electric ignition.

Description

technical field [0001] The invention belongs to the technical field of liquid rocket engine gas-gas combustion, and in particular relates to a spark plug type electric ignition coaxial shearing nozzle device. Background technique [0002] By designing a reasonable nozzle structure and ignition method, the combustion law of hydrogen or combustible hydrocarbons under oxygen can be studied in depth, and the influence of different parameters on the combustion law can be obtained. Common nozzle structures mainly include mutual impact type, coaxial centrifugal type, coaxial direct current type and double coaxial nozzles, etc. Common ignition methods mainly include chemical ignition, pyrotechnic ignition, electric spark ignition, torch type resonance ignition, etc. Commonly used ignition methods should be simple and reliable, and can be started many times, mainly including electric ignition, gunpowder ignition and torch ignition. For example, reference 1: Sun Jiguo, Wang Jue. Expe...

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Problems solved by technology

For example, reference 1: Sun Jiguo, Wang Jue. Experimental research on high-mixing ratio torch electric igniter [J]. Propulsion Technology, 2000, 21(1): 33-35. It is recorded that hydrogen-oxygen rocket engines tend to use multiple ignitions , repeated start torch electric igniter, torch electric igniter has a wide range of working conditions and mixing ratios, and has been widely used in hydrogen and oxygen engines abroad, but torch electric igniter is actually a complete Miniature pre-combustion chamber, the corresponding structural design is complex, the ignition energy is low, and there are high requirements for ignition timing

In reference 2: Sun Pizhong, Qin Zizeng, Zhang Xiaojin, Guo Jian. Micro-miniature solid rocket motor ignition characteristics test [J]. Journal of National University of Defense Technology, 2000, 22(5): 23-25. Recorded micro-miniature solid rocket motor For the requirements of stable ignition process and small ignition delay time, the igniter of the integral electric ignition device can realize many advantages such as stable ignition process and small ignition delay time, and the igniter of the integral electric ignition device is composed of electric ignition head, Composed of igniting powder and igniting powder box, the black powder added with part of pyrotechnic agent has the advantages of high thermal sensitivity and good ignition characteristics, but it may produce a high initial pressure peak, and the igniter of the integral electric ignition device cannot The problem of realizing multiple ignitions and repeated starts

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