Inertial particle transport in non-uniform accelerated flow

被引：0
|
作者：
Li Q. [1 ,2 ]
Tu G. [1 ,2 ]
Yu Z. [3 ]
Lin Z. [3 ]
Li T. [1 ,4 ]
Yuan X. [1 ,2 ]
机构：
[1] State Key Laboratory of Aerodynamic, China Aerodynamics Research and Development Center, Mianyang
[2] Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang
[3] Institute of Fluid Engineering, School of Aeronautics and Astronautics, Zhejiang University, Hangzhou
[4] School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2021年 / 42卷
关键词：
Inertial particle; Particle resolved direct numerical simulation; Particle transport mechanism; Strain flow; Wall-bounded stagnation point flow;
D O I：
10.7527/S1000-6893.2021.26390
中图分类号：
学科分类号：
摘要：
The effect of thermal ablation of novel carbon fiber composites material on the aerodynamic force and heat is not fully understood. As the primary research, without considering the chemical reaction, gas injection and other complicate physical process, this study assumes the particle loss from the vehicle surface as a discrete particles dynamics problem. Because of the high temperature in the near wall, and that the local Mach number is vanishingly small, so the near wall fluid flow can be treated as incompressible. Thereby, Particle Resolved Direct Numerical Simulation (PR-DNS) of incompressible flow is used to study the particle dynamics in a strain flow and wall-bounded stagnation point flow. It is found that the particle transport in a wall-bounded stagnation point flow is horizontal, with minimal vertical transport, which is very different from that of parallel shear flow over a particles bed. This is due to the normal hydrodynamic force of stagnation point flow. © 2021, Beihang University Aerospace Knowledge Press. All right reserved.
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