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首页> 外文期刊>Acta astronautica >Experimental verification of cylindrical air-breathing continuous rotating detonation engine fueled by non-premixed ethylene
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Experimental verification of cylindrical air-breathing continuous rotating detonation engine fueled by non-premixed ethylene

机译：非预混合乙烯燃料圆柱空气呼吸连续旋转爆轰发动机的实验验证

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摘要

An especial air-breathing continuous rotating detonation engine without a centerbody is proposed to reduce energy loss and simplify the structure, which is analogous to a typical scramjet combustor with the cavity. Non-premixed ethylene/air rotating detonation experiments are performed in a direct-connect experimental facility with an air inflow of 860 K total temperature (Ma 2.02). Two combustion modes (continuous rotating detonation and deflagration mode) are discovered with varying equivalent ratio (ER). A proper accumulation layer of the combustible mixture in the cavity re-circulation region attaching the outer wall is critical for rotating detonation realization. The average propagation velocity of the detonation wave is 1297.1 m/s (78.5% C-J velocity) at ER = 0.64 with the combustor pressure of 230 kPa. Its motion of the reaction zone is quantitatively verified to be rotating through the integral of chemiluminescence intensity. Besides, it is confirmed by the optical observation that deflagration could also self-sustain in the short combustor with the axial-moving flame. The combustor pressure of deflagration mode can reach 220 kPa with ER = 0.56. Though the combustor pressure of detonation is slightly higher than that of deflagration, the impact of combustor high-pressure on the inflow of detonation mode is much stronger through the induced oblique shock wave.
机译：提出了一种特殊的空气呼吸连续旋转爆轰发动机，无需中心体，以减少能量损失并简化结构，这些结构类似于具有腔的典型瘙痒型燃烧器。非预混合的乙烯/空气旋转爆轰实验在直接连接的实验设施中进行，空气流入860k总温度（MA 2.02）。以不同的等效比（ER）发现了两种燃烧模式（连续旋转爆震和滤液模式）。连接外壁的腔再循环区域中的可燃混合物的适当积聚层对于旋转爆轰实现至关重要。 ER = 0.64的爆炸波的平均传播速度为1297.1m / s（78.5％C-j速度），燃烧压力为230kPa。定量地验证其反应区的运动以通过化学发光强度的积分旋转。此外，它通过光学观察确认，即净化也可以通过轴向移动的火焰在短燃烧器中自动维持。燃烧模式的燃烧器压力可以达到220kPa，ER = 0.56。虽然爆炸的燃烧压力略高于透明透明度，但燃烧器高压对爆炸模式流入的影响通过诱导的倾斜冲击波更强大。

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  • 来源
    《Acta astronautica》 |2021年第12期|722-732|共11页
  • 作者

    Wang Guangyu; Liu Weidong; Liu Shijie; Zhang Hailong; Peng Haoyang; Zhou Yunfan;

  • 作者单位

    Natl Univ Def Technol Sci & Technol Scramjet Lab Changsha 410073 Peoples R China;

    Natl Univ Def Technol Sci & Technol Scramjet Lab Changsha 410073 Peoples R China;

    Natl Univ Def Technol Sci & Technol Scramjet Lab Changsha 410073 Peoples R China;

    Natl Univ Def Technol Sci & Technol Scramjet Lab Changsha 410073 Peoples R China;

    Natl Univ Def Technol Sci & Technol Scramjet Lab Changsha 410073 Peoples R China;

    Natl Univ Def Technol Sci & Technol Scramjet Lab Changsha 410073 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

    Continuous rotating detonation; Ethylene; Cylindrical chamber; Air-breathing mode; Flame distribution;

    机译：连续旋转爆轰;乙烯;圆柱形室;空气呼吸模式;火焰分布;

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