文氏管对气液两相脉冲爆轰发动机工作过程影响的数值模拟  

SIMULATION OF THE EFFECTS OF VENTURI ON GAS-DROPLETS TWO PHASE PULSE DETONATION ENGINE

作　　者：蒋弢[1] 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

出　　处：《工程力学》2014年第1期229-235,共7页Engineering Mechanics

基　　金：高等学校博士学科点专项科研基金项目(20093219110037);南京理工大学自主科研专项计划项目(2011XQTR05)

摘　　要：为研究文氏管对脉冲爆轰发动机内雾化混合和爆轰过程的影响,建立了气液两相爆轰的欧拉-拉格朗日模型,其中气相采用时空守恒元与求解元方法求解,液相采用四阶龙格库塔法求解。计算结果表明:文氏管能加快液滴雾化、两相混合,缩短点火起爆距离和时间;并且喷嘴安装在文氏管喉部时点火起爆距离和时间最短。研究结果可为脉冲爆轰发动机的优化设计提供参考。To investigate the effects of venturi on the atomization, mixing and detonation process in pulse detonation engine（PDE）, the Euler-Lagrange model for gas-droplets two phase detonation is built, while the gas and liquid equations are respectively calculated by the conservation element and solution element（CE/SE） method and fourth-order Runge-Kutta method. Numerical results show that the venturi can accelerate the liquid atomization, improve the gasoline-air distribution performance and shorten the deflagration to detonation transition （DDT） distance and time. When the injector is installed at the throat of venturi, PDE has the shortest DDT distance and time. The results can provide reference for the improvement of PDE.

关 键 词：脉冲爆轰发动机 文氏管 时空守恒元与求解元方法 雾化混合 两相爆轰 

分 类 号：V233.3[航空宇航科学与技术—航空宇航推进理论与工程]