19 October 2016 Analysis of nozzle effect on pulsed detonation engine performance based on laser absorption spectroscopy with Doppler frequency shift
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Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101552W (2016) https://doi.org/10.1117/12.2247240
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
An optical experiment system of tunable diode laser absorption spectroscopy is designed for valveless gas-liquid PDE to reveal the mechanism of nozzle improved the thrust performance. The velocity of detonation exhaust with non-nozzle, convergent nozzle, divergent nozzle and convergent-divergent nozzle is tested by laser Doppler velocimetry. The results indicate that laser Doppler method can accurately infer the instantaneous flow velocity, especially the velocity platform where contributes more to the engine impulse. The maximum value is 1222.66 m/s, 1128.52 m/s, 1338.64 m/s and 1296.93 m/s, the time of duration which the velocity is greater than 400m/s is 8.51ms, 7.58ms, 5.83ms and 17.62ms of the velocity under the condition of non-nozzle, convergent nozzle, divergent nozzle and convergent-divergent nozzle respectively.
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Xiao-long Huang, Ning Li, Chun-sheng Weng, Xiao-jing Lv, "Analysis of nozzle effect on pulsed detonation engine performance based on laser absorption spectroscopy with Doppler frequency shift", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101552W (19 October 2016); doi: 10.1117/12.2247240; https://doi.org/10.1117/12.2247240
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