Change in Continuous Detonation Wave Propagation Mode from Rotating Detonation to Standing Detonation

• 作者: 王健平 邵业涛
• 来源期刊: 中国物理快报(英文版)
• 学科: 交通运输
• 关键词: 旋转方式 爆轰波 传播模式 注射速度 化学反应模型 三维数值模拟 分布宽度 细胞体积
• 年，卷（期）: 2010,（3）
• 页码范围: 216-219
• 页数: 4页
• 分类号: U416.01 TS952.81
• 语种: 英文

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.