脉冲爆震发动机无阀工作对供给系统影响研究  

Research on the effects of valveless operations of pulse detonation engine on supply system

作　　者：邱华[1] 严传俊[1] 熊姹[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《航空动力学报》2010年第5期987-992,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(50906072);教育部博士点基金(2009531412005)

摘　　要：通过测量无阀脉冲爆震发动机非定常工作对供气供油系统影响的压力数据,对建立的燃油和空气管路数值仿真模型进行了验证,基于建立的模型研究了供给系统的流量特性.研究结果表明,供油供气系统受同一爆震管头部压力作用带来的影响是不同的,这进一步导致供给系统气动开启初始充填的非定常特性,对于给定的供给系统,这种非定常特性的持续时间是固定的,当发动机工作频率增大时,其占单个周期的比重越来越大,最终导致脉冲爆震发动机的不稳定工作.Experimental research on the effects of valveless pulse detonation engine on supply system was conducted. The pressures at different positions of pipe were measured,and also used to verify the numerical simulation models of fuel pipe and air pipe. Based on the numerical model,flow characteristics of the supply system were investigated. This showed that the influences of the same head pressure on the air and fuel supplies were different. And it caused unsteady filling when the supply system was opened because of differential pressure. The unsteady filling time was fixed and determined by the given supply system. When the working frequency of the engine became larger,the ratio of this time to one cycle time increased,that is to say,more influences of unsteady feeding were imposed on the operation characteristics of the engine. Therefore,the distribution of fuel concentration was more non-uniform and the working state of pulse detonation engine was instable.

关 键 词：无阀脉冲爆震发动机 供给系统 试验研究 数值仿真 匹配特性 

分 类 号：V231.22[航空宇航科学与技术—航空宇航推进理论与工程]