以铝粉为燃料的脉冲爆轰发动机数值研究  

Numerical simulation of detonation engine using aluminum dust as fuel

作　　者：韦伟[1,2] 翁春生[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]江苏海事职业技术学院,南京211170

出　　处：《固体火箭技术》2017年第1期37-40,59,共5页Journal of Solid Rocket Technology

基　　金：国家自然科学基金(11472138);中央高校基本科研业务费专项基金(30920140112011)

摘　　要：研究了采用固体粉末为燃料的脉冲爆轰发动机的流场情况。运用CE/SE方法与四阶龙格-库塔法相结合,构造了以铝粉为燃料的脉冲爆轰发动机二维两相内流场的数值计算格式。数值模拟了PDE管内轴线上压力、速度随时间的变化情况,轴截面上的压力分布云图,管内固体燃料颗粒粒径随时间的变化,以及不同情况下PDE的瞬时推力和总冲量等。由此分析了固体燃料PDE管内爆轰波的传播特性,讨论了燃烧产物的物理特征、环境温度和环境压力的变化对PDE推力性能的影响。结果表明,采用铝粉作为PDE的燃料能够提供有效的推力。数值计算结果对固体燃料脉冲爆轰发动机的研究具有重要的理论指导意义。The flow field of pulse detonation engine using solid fuel was investigated.Two-phase model of pulse detonation engine using aluminum dust as fuel was created according to the theory of CE/SE method and fourth order runge-kutta method.Pressure and velocity contribution vs.time along the center axis were numerical simulated,and also pressure distribution in PDE,particle size of aluminum dust vs.time,thrust,impulse,and fuel-specific impulse of PDE at different situation.Based on these,propagation characteristics of detonation wave in pulse detonation engine using aluminum dust as fuel were anglyzed,and the influence factors of the thrust performance were discussed.The results here show that it is able to provide effective thrust using aluminum dust as fuel of PDE in theory.All the numerical results in this paper provide some theoretical foundation for the research of pulse detonation engine using solid fuel.

关 键 词：脉冲爆轰发动机 铝粉 两相爆轰 CE/SE方法 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]