H2/Air连续旋转爆震波的起爆及传播过程试验

推进技术 ›› 2012, Vol. 33 ›› Issue (3): 483-489.

H₂/Air连续旋转爆震波的起爆及传播过程试验

刘世杰,林志勇,林伟,周朱林,刘卫东

国防科技大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科技大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科技大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科技大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科技大学高超声速冲压发动机技术重点实验室,湖南长沙 410073

发布日期:2021-08-15
作者简介:刘世杰(1983—),男,博士生,研究领域为高超声速推进技术。E-mail:lsjnudt@gmail.com
基金资助:
国家自然科学基金(90816016)。

Experiment on the Ignition and Propagation Processes of H₂/Air Continuous Rotating Detonation Wave

Science and Technology on Scramjet Laboratory, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory, National University of Defence Technology, Changsha 410073,China

Published:2021-08-15

摘要/Abstract

摘要： 在环缝-喷孔对撞式喷注模型发动机上,采用H₂/O₂热射流切向喷注的起爆方式,进行了H₂/Air组合的连续旋转爆震试验,试验成功起爆并实现了爆震波的持续旋转传播。切向喷注的热射流并没有直接诱导形成旋转爆震波,从点火到形成稳定传播的旋转爆震波之间存在时间间隔。对高频信号的时频分析结果表明,在该试验工况下,旋转爆震波的传播过程非常稳定,其传播频率为5.5~5.95 kHz,平均传播频率为5.75 kHz,对应的平均传播速度为1716.4m/s,为理论预测值的91.14%。在没有测量高频压力的情况下开展了长程试验,结果表明,连续旋转爆震波也可以在更长的时间范围内稳定工作。 

关键词: 连续旋转爆震波;H₂/Air组合;喷注方式;试验研究

Abstract: Based on the engine model with slot-injector impinging injection method, H₂/Air continuous rotating detonation was studied experimentally. The engine was ignited by tangentially installed H₂/O2 hotshot tube. But the H₂/O2 hotshot jet could not induce the rotating detonation wave directly. There was a delay time between the ignition and the start of continuous rotating detonation wave. Time-frequency characteristic of the signal measured by fast frequency pressure sensor was analyzed. Under this experiment condition, the rotating detonation wave propagation process was stable. Its propagation frequency ranged 5.5~5.95kHz, and the mean propagation frequency was about 5.75kHz, with the corresponding mean rotating velocity of 1716.4 m/s, which was 91.14 percent of the theoretical CJ velocity value. Long-time test without fast frequency pressure sensor was carried out, and the results demonstrated that the rotating detonation wave could also propagate continuously for a long time on this engine model.

Key words: Continuous rotating detonation wave；H₂/Air mixture；Injection method；Experimental research

刘世杰,林志勇,林伟,周朱林,刘卫东. H₂/Air连续旋转爆震波的起爆及传播过程试验[J]. 推进技术, 2012, 33(3): 483-489.

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H₂/Air连续旋转爆震波的起爆及传播过程试验

Experiment on the Ignition and Propagation Processes of H₂/Air Continuous Rotating Detonation Wave

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