Detonation excitation system and method based on high speed jet

Abstract

The invention provides a detonation excitation system based on high speed jet. The system comprises a shock tube, wherein a plurality of holes are set on the shock tube, through utilization of the holes; the shock tube is assembled with a test mixed gas system, a data collection system and a jet control system in sequence along a length direction of the shock tube; an ignition system is set at a tail end of the shock tube; the data collection system comprises a plurality of optical fiber sensors and a plurality of shock wave probes which are inserted into the holes of the shock tube at equal intervals, and the jet control system and the ignition system are connected with a control panel. The invention also provides a detonation excitation method. According to the detonation excitation system based on the high speed jet provided by the invention, through mutual effect of the high speed jet and flame, detonation is excited through the high speed jet, so a relatively small blockage ratiocan be achieved, deflagration to detonation distance can be effectively reduced, and total pressure losses in a whole detonation process can be reduced.

Description

technical field [0001] The invention relates to an engine system, in particular to a detonation excitation system and method. Background technique [0002] The study of gas-phase detonation physics has important academic significance and application value: in recent decades, the design requirements of ultra-high-speed detonation engines have greatly promoted the development of gas-phase detonation research. The analysis of the characteristics and laws of gas-phase detonation can provide Further research on gas phase detonation provides a basis, so as to supplement and improve the existing related theoretical expressions and mechanism analysis, and promote the development of detonation engines. [0003] Ultra-high-speed detonation engines have broad application prospects due to their high thermal cycle efficiency, wide operating range, and simple structure. In the research process of the ultra-high-speed detonation engine, one of the key problems is to quickly form a stably ...

AI Technical Summary

Problems solved by technology

However, the blocking ratio of the physical orifice deflagration-to-detonation device is relatively high, and the total pressure loss in the tube is relatively large; if a shorter spring is used to achieve a shorter detonation distance, only when the spring has the highest blocking ratio can a stable and continuous flow be formed. detonation wave, and if a spring with a smaller blocking ratio is used, the combustion-to-detonation process can only be achieved when its length increases

Therefore, the existing detonation devices cannot meet the requirement of small spring blocking ratio and short detonation distance at the same time.

Images