A high-speed jet-based detonation excitation system and method

Abstract

The invention provides a high-speed jet-based detonation excitation system, including a shock tube, which is provided with a plurality of openings, and through these openings along the length direction of the shock tube, it is sequentially connected with the test mixed gas system, The data acquisition system and the jet control system are installed in cooperation, and the end of the shock tube is provided with the ignition system; the data acquisition system includes a plurality of optical fiber sensors inserted in the openings of the shock tube at equal intervals and Multiple shock wave probes, fluidic control system and ignition system are connected to a control panel. The invention also provides a detonation excitation method. The high-speed jet-based detonation excitation system of the present invention interacts with the flame through the high-speed jet, and generates excitation to the detonation through the high-speed jet. Therefore, it can achieve a smaller blocking ratio, effectively shorten the distance from combustion to detonation, and reduce the The total pressure loss throughout the detonation process.

Description

Technical field [0001] The present invention relates to an engine system, and more particularly to a detonation excitation system and method. Background technique [0002] The research of gas phase explosion physics is important, the application value: the design demand for ultra-high-speed detonation engine in recent decades has greatly promoted the development of gas phase explosion research, and the analysis of gas phase detuning characteristics and regular analysis can be Further research on gas phase explosion provides a basis to supplement and improve the existing relevant theoretical expression and mechanism analysis, promoting the development of detonation engines. [0003] Ultra-high-speed detonation engine has a wide range of application prospects due to its advantages of high thermal cycle efficiency, wide operating range, simple structure. A key problem is to quickly form a stable propagation in the explosive tube (i.e., the hositor). During the cycle of ultra-high-sp...

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 device cannot meet the requirement of small spring blocking ratio and short detonation distance at the same time.

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