论文部分内容阅读
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.
By measuring the pressure data of the valveless pulse detonation engine on the air supply and fuel supply system, the numerical simulation models of the fuel and air pipelines were verified, and the flow characteristics of the system were studied based on the established model. The results show that the influence of the pressure on the oil supply and air supply system by the same detonator head pressure is different, which further leads to the unsteady behavior of the initial filling of the supply system by pneumatic actuation. For a given supply system, this unsteady Characteristics of the duration is fixed, when the engine operating frequency increases, its share of a single cycle of increasing proportion, eventually leading to pulse detonation engine instability.