Flow and heat transfer performance in transpiration pore structure based on LBM

被引：0
|
作者：
Chen X. [1 ]
Li Z. [1 ]
Li Q. [1 ]
Zheng H. [1 ]
Dong W. [1 ]
机构：
[1] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 02期
关键词：
heat transfer; lattice Boltzmann method; pore scale; porous media; transpiration cooling;
D O I：
10.13224/j.cnki.jasp.20210425
中图分类号：
学科分类号：
摘要：
With the background of transpiration cooling technology, the influence of porous media structure on structure temperature field was investigated at pore scale by using D3Q19 lattice Boltzmann method program. The permeability and solid temperature distributions of two commonly used porous structures： spherical particle packing structure and random structure, were simulated and analyzed respectively. The results showed that for the particle packing structure, when the particles were arranged regularly, the solid temperature distribution showed an obvious ladder shape; when the particles were arranged irregularly, the solid temperature change trend was relatively stable, and with the increase of particle diameter, the permeability increased and the solid temperature decreased. For random porous structure, with the decrease of pore size, permeability decreased and solid temperature increased. In the porosity range of 0.3 —0.5, due to the different internal convection heat transfer intensity of particle packing structure and random structure, the solid temperature had different variation characteristics. © 2023 BUAA Press. All rights reserved.
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页码：325 / 334
页数：9
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