空间模式下可压缩气固两相混合层流动特性研究  

Characteristics of the flow of spatial developing compressible gas-solid mixing layer

作　　者：刘伟[1] 陈景兵[1] 万国新[1] 杨小亮[1] 

机构地区：[1]国防科技大学,长沙410073

出　　处：《应用力学学报》2010年第2期226-231,共6页Chinese Journal of Applied Mechanics

基　　金：973计划项目(2009CB723800;61351);国家自然科学基金(90716015)

摘　　要：采用Euler-Lagrange颗粒-轨道双向耦合模型对空间模式下含有固粒的二维可压缩混合层流场进行了研究。气相流场采用具有空间三阶精度的WNND格式进行数值模拟,固相方程采用单边三点差分离散。在考虑流场对固粒作用的同时,也计及了固粒对流场的反作用。在对流马赫数为0.5时,研究了颗粒相对密度、颗粒尺寸、Stokes数等因素对粒子运动和流场结构的影响。研究结果表明:在可压缩空间模式混合层中,固粒的Stokes数仍然是主要影响参数之一;相同Stokes数下不同密度的固粒对流场的干扰不同,轻固粒对流场的干扰明显要小。A two-dimensional compressible spatial developing mixing layer flow field with particles is studied by using Euler-Lagrange two-way coupling model.The gas-field is solved by direct numerical simulation method with the WNND scheme which is three-order accuracy in space,and the equations of particles are discretized by biased three-point difference.Not only gas-field's influence on particles but also the reaction of particles to gas-field is considered.At the convective Mach number 0.5,the influence of different relative density of particles、 size of particles and Stokes number on particle's dispersion and gas-field structure is investigated.The study indicates that the St number is still one of the key parameters for the spatial developing compressible gas-solid mixing layer.If the St number is kept the same,the light particles will cause less disturbation than heavy one in gas-solid mixing layer.

关 键 词：可压缩流动 气固两相流 混合层 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]