上海航天（中英文）2024，Vol.41Issue(4)：19-26,8.DOI:10.19328/j.cnki.2096-8655.2024.04.003
单向多孔材料在电弧中冷却性能的数值模拟
Numerical Study on the Cooling Performance of directional Porous Materials in Electric Arcs
摘要
Abstract
Directionally solidified porous materials could be used to replace the water-cooled cooper walls in arc heaters,by which the enthalpy of the gas flow and the heat efficiency could be improved,and thus has a wide application prospect.In this paper,a mathematical model is developed for the heat transfer in unidirectional porous materials contacted with electric arcs.Numerical simulations are carried out to study the effects of porosity,aperture diameter,entry angle,and injection rate on the cooling performance of directional porous materials.The results indicate that the heat flux of the inner wall decreases by 92%with the increase in the porosity from 7.9%to 26.7%.When the porosity and flow velocity are constant,the average temperature of the inner wall increases from 498 K to 697 K with the increase in the aperture diameter from 0.3 mm to 0.8 mm.The variation of the entry angle could affect the injection rate and heat flux of the inner wall,and then change the cooling performance of the directional porous material.In addition,the increase in the injection rate from 14.2%to 42.7%could decrease the heat flux of the inner wall by approximately 17%.The results provide a reference for the application of unidirectional porous materials in arc heaters.关键词
单向多孔材料/电弧/热量传输/热通量/数值模拟Key words
directional porous material/electric arc/heat transfer/heat flux/numerical simulation分类
航空航天引用本文复制引用
余嘉,张志刚,袁竭,隆永胜..单向多孔材料在电弧中冷却性能的数值模拟[J].上海航天（中英文）,2024,41(4):19-26,8.基金项目
国家重点研发计划(2019YFA0405204) （2019YFA0405204）
