两相可压缩边界层的颗粒运动特性分析  

The Characteristics of Particle Motion in the Two-Phase Compressible Turbulent Boundary Layer

作　　者：肖威 金台 罗坤[1] 尚文强 王海鸥[1] 樊建人[1] XIAO Wei;JIN Tai;LUO Kun;SHANG Wen-Qiang;WANG Hai-Ou;FAN Jian-Ren(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China;School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室,杭州310027 [2]浙江大学航空航天学院,杭州310027

出　　处：《工程热物理学报》2021年第12期3207-3212,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51576176,No.51836007)。

摘　　要：本文采用高精度直接数值模拟方法,研究了马赫数为2的可压缩湍流边界层中,两种不同粒径颗粒的运动特性。研究发现近壁面的颗粒流向平均速度要小于流体;颗粒具有法向指向壁面的平均速度;近壁面颗粒的流向雷诺正应力要略大于流体:其中大颗粒具有更加显著的上述趋势。小颗粒的法向和展向雷诺正应力基本等于流体,而大颗粒则都要远小于流体。条件平均统计显示,大颗粒在低速区域的富集导致了这一现象。In this paper,the two-phase compressible turbulent boundary layer is investigated through direct numerical simulation to study the motion of Lagrangian point-source particles with different particle diameters.It is found that particles in the near-wall region have smaller stream-wise velocity than the fluid.Particles have a wall-oriented mean velocity.The streamwise Reynolds normal stress of particles is slightly larger than those of the fluid.All these aforementioned trends are more significant for large particles.The wall-normal and spanwise Reynolds normal stress of small particles are almost the same as those of the fluid,whereas those of the large particles are much smaller.The conditional sampling shows that the preferential accumulation of large particles in low-speed regions results in these phenomena.

关 键 词：湍流边界层 可压缩湍流 多相流 

分 类 号：O359[理学—流体力学]