中文摘要：

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．

英文摘要：

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.