雾化混合对气液两相脉冲爆轰发动机工作过程的影响  

Effect of atomization and mixtion on detonation process of gas-droplet 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,江苏南京210094

出　　处：《南京理工大学学报》2013年第5期692-698,共7页Journal of Nanjing University of Science and Technology

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

摘　　要：为了研究雾化混合对脉冲爆轰发动机工作性能的影响,建立了气液两相爆轰欧拉-拉格朗日模型,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,雾化后液滴的索泰尔平均半径小于某临界值时,可形成稳定的爆轰波。加快填充速度时,轴向进气比径向进气更有利于液滴雾化和两相混合,且点火起爆距离和时间缩短。To investigate the effect of atomization and mixtion on detonation process in the pulse detonation engine(PDE),the Euler-Lagrange model for the gas-droplet two-phase detonation is built,and the gas phase and liquid phase equations are calculated by the conservation element and solution element(CE / SE) method and the fourth-order Runge-Kutta method respectively.Numerical results show that when the Sauter mean radius of atomized droplets is less than the critical value,the stable detonation wave can be formed.For the axial inlets,increasing the fill speed can accelerate the liquid atomization,improve the gasoline-air distribution performance,and shorten the distance and time of the deflagration to detonation transition.

关 键 词：脉冲爆轰发动机 欧拉-拉格朗日模型 时空守恒元与求解元方法 两相爆轰 雾化 混合 

分 类 号：O381[理学—流体力学]