Change in Continuous Detonation Wave Propagation Mode from Rotating Detonation to Standing Detonation
SHAO Ye-Tao, WANG Jian-Ping
State Key Laboratory of Turbulence and Complex System, CAPT, Department of Mechanics and Aerospace Engineering, College of Engineering, Peking University, Beijing 100871
Change in Continuous Detonation Wave Propagation Mode from Rotating Detonation to Standing Detonation
SHAO Ye-Tao, WANG Jian-Ping
State Key Laboratory of Turbulence and Complex System, CAPT, Department of Mechanics and Aerospace Engineering, College of Engineering, Peking University, Beijing 100871
摘要We perform a three-dimensional numerical simulation based on a one-step chemical reaction model to investigate changes in the mode of H2-Air detonation wave propagation from rotating detonation wave (RDW) mode to standing detonation wave mode. The physical characteristics of an RDW with injection velocity of 500 m/s are analyzed to investigate the physical mechanisms involved. We find that with increasing injection velocity, the detonation wave gradually changes from perpendicular to the head wall to parallel to the head wall. When the injection velocity exceeds the Chapman-Jouguet velocity VCJ (about 1984 m/s), the detonation wave changes orientation to become perpendicular to the fuel injection direction, and the rotating mode changes accordingly to a standing mode. Finally, the plane detonation characteristic triple-wave structures can be found from the standing mode.
Abstract：We perform a three-dimensional numerical simulation based on a one-step chemical reaction model to investigate changes in the mode of H2-Air detonation wave propagation from rotating detonation wave (RDW) mode to standing detonation wave mode. The physical characteristics of an RDW with injection velocity of 500 m/s are analyzed to investigate the physical mechanisms involved. We find that with increasing injection velocity, the detonation wave gradually changes from perpendicular to the head wall to parallel to the head wall. When the injection velocity exceeds the Chapman-Jouguet velocity VCJ (about 1984 m/s), the detonation wave changes orientation to become perpendicular to the fuel injection direction, and the rotating mode changes accordingly to a standing mode. Finally, the plane detonation characteristic triple-wave structures can be found from the standing mode.
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2010, Vol. 27 
