计量学报2025，Vol.46Issue(4)：518-527,10.DOI:10.3969/j.issn.1000-1158.2025.04.08
发汗冷却用镍基泡沫孔隙尺度流动传热特性研究
Study on Pore Scale Flow and Heat Transfer Characteristics of Nickel-based Foam for Transpiration Cooling
摘要
Abstract
The study investigates nickel-based alloy foam for transpiration cooling,leveraging X-CT scanning technology to reconstruct its microstructures.Based on the multiple-relaxation lattice Boltzmann method(MRT-LBM),combined with GPU acceleration technology,a numerical simulation method for the pore-scale heat conduction and convection compound heat transfer of nickel-based alloy foam porous materials for transpiration cooling is established.Air is used as the cooling medium,with a focus on analyzing the flow and heat transfer characteristics of the nickel-based alloy foam under different Reynolds numbers.The results delineate three distinct flow regimes:the Darcy regime,the Transitional regime,and the Forchheimer regime,with a critical Reynolds number identified at 1.36×10⁻¹.While an increase in Reynolds number elevates flow resistance,it concurrently enhances heat transfer efficiency.Heat transfer within the Darcy regime is predominantly governed by conduction,whereas forced convection dominates in the Transitional and Forchheimer regimes.The overall heat transfer factor is positively correlated with the Reynolds number,indicating that an increase in Reynolds number effectively improves comprehensive heat transfer performance of foam structure.The study on the flow and heat transfer characteristics of nickel-based foam provide theoretical support for enhancing transpiration cooling efficiency.关键词
热学计量/镍基合金泡沫/格子玻尔兹曼方法/渗透率/传热特性Key words
thermometrics/nickel-based alloy foam/lattice Boltzmann method/permeability/heat transfer characteristics引用本文复制引用
周欣蕾,张超,张宏明,张红军,杨肖峰,曾磊,肖光明..发汗冷却用镍基泡沫孔隙尺度流动传热特性研究[J].计量学报,2025,46(4):518-527,10.基金项目
国家数值风洞工程 （）
人才计划项目(2021-93,2021-326) （2021-93,2021-326）
