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Experimental investigation on delay time phenomenon in rotating detonation engine

机译:旋转爆轰发动机延迟时间现象的实验研究

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摘要

This study explored the phenomenon of the detonation formation delay time in an RDE with an annular combustion chamber with an array of holes fueled with hydrogen. It was determined that the delay time increased when the combustor prefilling time increased. Due to the explosion, the interaction of the shock wave and the pressure wave in the combustor leads to an increase in pressure near the inlet wall surface, thereby impeding the gas feeding. The wavelet transformation was used to analyze the pressure time signal associated with the detonation wave, which was found to be better than the fast Fourier transform typically used. Moreover, the phenomenon of single-double-single wave transformation was observed, of which the underlying mechanism can be explained by an interactive-adjusting process. Also, the experiment captured the reinitiation phenomenon of detonations after a long period of time (around 300 ms) of extinction. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译:该研究探讨了具有环形燃烧室的RDE中的爆震形成延迟时间的现象,其具有用氢气燃料的孔阵列。当燃烧器预填充时间增加时,确定延迟时间增加。由于爆炸,冲击波和燃烧器中的压力波的相互作用导致入口壁表面附近的压力增加,从而阻碍了气体进给。小波变换用于分析与爆炸波相关的压力时间信号,该压力时间信号被发现比通常使用的快速傅里叶变换更好。此外,观察到单双单波变换的现象,其中潜在机构可以通过交互式调节过程解释。此外,实验捕获了长时间后(约300毫秒)的灭绝后的爆炸的重新变化现象。 (c)2019年Elsevier Masson SAS。版权所有。

著录项

  • 来源
    《Aerospace science and technology》 |2019年第5期|395-404|共10页
  • 作者单位

    Peking Univ Ctr Combust & Prop CAPT&SKLTCS Dept Mech & Engn Sci Coll Engn Beijing 100871 Peoples R China;

    Peking Univ Ctr Combust & Prop CAPT&SKLTCS Dept Mech & Engn Sci Coll Engn Beijing 100871 Peoples R China;

    Peking Univ Ctr Combust & Prop CAPT&SKLTCS Dept Mech & Engn Sci Coll Engn Beijing 100871 Peoples R China;

    Peking Univ Ctr Combust & Prop CAPT&SKLTCS Dept Mech & Engn Sci Coll Engn Beijing 100871 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rotating detonation engine; Experimental Investigation; Delay time; Wavelet analysis;

    机译:旋转爆轰引擎;实验研究;延迟时间;小波分析;

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