航空学报 > 2022, Vol. 43 Issue (1): 124870-124870   doi: 10.7527/S1000-6893.2020.24870

点火方式对空桶型旋转爆震燃烧室起爆特性的影响

赵明皓1, 王可2, 王致程1, 朱亦圆1, 于潇栋1, 范玮1   

  1. 1. 西北工业大学 动力与能源学院, 西安 710072;
    2. 西北工业大学 陕西省航空动力系统热科学重点实验室, 西安 710129
  • 收稿日期:2020-10-13 修回日期:2020-12-21 出版日期:2022-01-15 发布日期:2020-12-18
  • 通讯作者: 王可 E-mail:wangk@nwpu.edu.cn
  • 基金资助:
    国家自然科学基金(52076181,51876179);陕西省自然科学基础研究计划(2020JQ-185);中央高校基本科研业务费专项资金(3102018AX006,3102019ZX024);西北工业大学博士生创新基金(CX2021072)

Effects of ignition on initiation characteristics of hollow rotating detonation combustor

ZHAO Minghao1, WANG Ke2, WANG Zhicheng1, ZHU Yiyuan1, YU Xiaodong1, FAN Wei1   

  1. 1. School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China;
    2. Shaanxi Key Laboratory of Thermal Sciences in Aeroengine System, Northwestern Polytechnical University, Xi’an 710129, China
  • Received:2020-10-13 Revised:2020-12-21 Online:2022-01-15 Published:2020-12-18
  • Supported by:
    National Natural Science Foundation of China (52076181, 51876179); Natural Science Basic Research Program of Shaanxi (2020JQ-185); the Fundamental Research Funds for the Central Universities (3102018AX006, 3102019ZX024); Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (CX2021072)

摘要: 为了揭示空桶型旋转爆震燃烧室内爆震波的建立过程及工作特性,分别采用火花塞点火、垂直预爆震管点火和切向预爆震管点火,实验研究了不同点火方式下的爆震波起爆和稳定传播特性。喷注器采用环缝-喷孔对撞式设计,燃料和氧化剂分别为乙烯和富氧空气。结果表明,在空桶型旋转爆震燃烧室中,3种点火方式均可成功起爆并获得稳定传播的爆震波,点火方式对旋转爆震波的传播方向影响较小;与火花塞点火相比,垂直预爆震管点火和切向预爆震管点火均能拓宽旋转爆震燃烧室的稳定工作范围;在氧化剂供给流量和当量比相同的条件下,点火方式的改变并未影响旋转爆震波的传播速度大小;使用预爆震管点火时,旋转爆震波的建立时间较火花塞点火短,且呈现出更小的离散性。

关键词: 点火方式, 空桶型燃烧室, 起爆, 旋转爆震, 传播方向

Abstract: To investigate the initiation process and operating characteristics of rotating detonation waves in the hollow combustor, the initiation and propagation of rotating detonation waves of three ignition methods, i.e., spark plug ignition, vertical pre-detonation tube ignition, and tangential pre-detonation tube ignition, were studied. Ethylene and oxygen-enriched air were used as fuel and oxidizer, respectively. Experimental results indicate that the rotating detonation waves were able to be initiated and propagated steadily with the three ignition methods, which seem to have little influence on the propagating direction of rotating detonation waves. Compared with the results of spark plug ignition, stable detonations were available with a wider range of mass flow rate when adopting vertical and tangential pre-detonation tube ignition. The obtained average propagating velocities of rotating detonations were almost consistent for all the three cases. When the pre-detonation tube was used, the initiation time of rotating detonation wave was obviously shorter and less discrete than that of spark plug ignition.

Key words: ignition, hollow combustor, initiation process, rotating detonation, propagating direction

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