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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (5): 125372.doi: 10.7527/S1000-6893.2021.25372

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Effect of combustor configurations on propagation characteristics of rotating detonation waves

ZHAO Minghao1, WANG Ke2, WANG Zhicheng1, ZHU Yiyuan1, LI Qing'an1, 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:2021-02-04 Revised:2021-02-24 Published:2021-04-08
  • Supported by:
    National Natural Science Foundation of China (52076181, 52176133); Natural Science Basic Research Program of Shaanxi (2020JQ-185); the Fundamental Research Funds for the Central Universities (3102019ZX024); Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (CX2021072)

Abstract: To analyze the propagation characteristics of the rotating detonation waves in different combustors, five combustors with different structural parameters were adopted, including one hollow chamber, two kinds of annular chambers, and two kinds of cavity chambers. Experiments were conducted in different combustors under the same supplying condition utilizing ethylene and oxygen-enriched air. The fuel and oxidizer were injected separately through a slot-orifice injection structure. The characteristics of the rotating detonation wave and propulsive performance are discussed. In the hollow chamber, the rotating detonation wave propagates steadily in the stable detonation mode with a wider range of equivalence ratio, while the propulsive performance is the lowest. In the cavity chambers, the operating range of the stable detonation mode is between the two annular chambers with chamber widths of 19 mm and 15 mm, but the propulsive performance is slightly higher than that of the annular chamber with a width of 19 mm. In addition, the operating range based on the cavity chambers increases with the increase of the cavity length.

Key words: combustor configurations, propagation characteristics, operating range, propulsive performance, rotating detonation

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