Experimental Research on Influence of Oxidant Injection Area on the Propagation Characteristics of Continuous RotatingDetonation Wave

doi:10.3969/j.issn.1000-1093.2018.12.008

Abstract

Abstract: A series of experimental study of continuous rotating detonation engine (CRDE) with orifice-slit injection mode, which utilizes H₂ as fuel and air as oxidant, were carried out to study the influence of oxidant injection area on the propagation characteristics of continuous rotating detonation wave . Based on the high-frequency pressure signal in the combustion chamber and the pressure signal in the oxidant chamber, the influence of oxidant injection area on the propagation, velocity loss, stability and wavefront height of detonation wave is analyzed in detail. The experimental results show that, when the mass flow rate of propellant remains constant, the loss of propagation velocity of detonation wave becomes larger, the stability of propagation velocity of detonation wave becomes worse, and the wavefront height of detonation wave decreases with the increase in oxidant injection area. When the oxidant injection area is 217.1 mm² and the equivalent ratio is 0.9, the average velocity of detonation wave reaches 1 800 m/s, which is 93% of the theoretical Chapman-Jouguet (CJ) velocity, and the stability of detonation wave is also the best. When the oxidant injection area remains constant, the stability of detonation wave first increases and then decreases with the increase in equivalence ratio. Key

Key words: continuousrotatingdetonationengine, detonationwave, oxidantinjectionarea, propagationcharacteristic, speedloss

CLC Number:

O381
V437

WEI Wan-li， WENG Chun-sheng， WU Yu-wen， ZHENG Quan， LI Bao-xing. Experimental Research on Influence of Oxidant Injection Area on the Propagation Characteristics of Continuous RotatingDetonation Wave[J]. Acta Armamentarii, 2018, 39(12): 2345-2353.

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第39卷第12期
2018 年12月兵工学报ACTA
ARMAMENTARIIVol.39No.12Dec. 2018

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