多管脉冲爆轰发动机管外复杂波系的研究

为了研究多管脉冲爆轰发动机外流场复杂波系变化特点，用CE/SE方法对7管脉冲爆 轰发动机内、外流场进行了计算. 7个爆轰管的排列方式是1个居中，另外6个绕其形成环 状排列，管内填充按化学当量比混合的氢气氧气混和物. 计算结果表明：CE/SE方法是一种 好的爆轰波模拟方法，能有效地捕捉激波等强间断；7管脉冲爆轰发动机外流场中存在着多 道相互作用相互影响的激波与膨胀波. 计算结果对多管脉冲爆轰发动机外流场复杂波系的特 性研究具有重要参考价值.

A STUDY ON COMPLEX WAVE SYSTEM OUTSIDE MULTI-TUBE PULSE DETONATION ENGINE

To investigate the characteristics of the complex wave system outside a multi-tube pulse detonation engine, the space-time conservation element and solution element(CE/SE) method was used to simulate the flow-field inside and outside the pulse detonation engine with seven tubes. One tube was in the center, and the other six were around it in a ring. All seven tubes were filled with the stoichiometric hydrogen-oxygen mixture. The results of calculation show that this CE/SE method can capture the shocks efficiently; there are several interacting or impacting shocks and expansion waves outside the 7-tube pulse detonation engine. The results of calculation can be used to study the characteristics of flow-field outside the multi-tube pulse detonation engine.