Inclined detonation experiment system based on gas detonation driving superspeed launching device

Abstract

The invention relates to the technical field of combustible gas detonation experiment devices, and provides an inclined detonation experiment system based on a gas detonation driving superspeed launching device. A secondary light gas gun unit is included, the secondary light gas gun unit is connected with an inclined detonation experiment cabin unit and an igniter, the inclined detonation experiment cabin unit is provided with a high-speed photography system, the inclined detonation experiment cabin unit is filled with combustible mixed gas before an experiment is started, and the igniter, the inclined detonation experiment cabin unit and the high-speed photography system are controlled by a computer system; and before the experiment is started, the inclined detonation experiment cabin unit is filled with combustible mixed gas according to a preset working condition and is statically placed, so that the state of the combustible mixed gas is accurately controlled, the combustible mixed gas does not react before the experiment is started, the property of the combustible mixed gas is accurately measured, the purity degree and sufficient and uniform mixing of the combustible mixed gas are guaranteed, and the detonation process of inclined detonation is observed through the high-speed photography system.

Description

technical field [0001] The invention relates to the technical field of combustible gas detonation experimental devices, in particular to an oblique detonation experimental system based on a gas detonation-driven ultra-high-speed launching device. Background technique [0002] Detonation is a chemical reaction transport process accompanied by a large amount of energy release. The chemical reaction process in a detonation releases energy at a high rate. Therefore, the detonation experiment is an important basic experimental research in related scientific research fields. [0003] In the oblique detonation experimental method in the prior art, after the combustible gas is accelerated to a high speed by using a wind tunnel, the gas mixture is induced to detonate by a shock wave on the surface of the model. In this experimental method, the common mixing schemes of the combustible gas mixture include mixing in front of the nozzle before the start of the wind tunnel, and injectin...

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Problems solved by technology

[0004] When the scheme of mixing in front of the nozzle before the start of the wind tunnel is adopted, during the compression process of the combustible mixture in the wind tunnel, due to the effect of high pressure and high temperature, the combustible mixture will be ignited in advance, and the nozzle may appear during this process. The problem of impure flow, the incoming flow contains both flammable mixed gas and combustion products, and the mixing ratio of flammable mixed gas and combustion products cannot be directly measured, which affects the analysis of experimental results

Injecting fuel after the nozzle can avoid the pre-ignition of the combustible mixture, but because the mixing process of the fuel in the high-speed airflow cannot be directly measured, and the degree of mixing of the combustible gas cannot be directly evaluated, it is very difficult to determine the state of the incoming flow in the experiment, thus Observation and research on experimental phenomena

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