金属海绵阻力特性数值计算  

Numerical calculation on resistance characteristics of metal foam

作　　者：张丽芬[1] 葛鑫 胡兴龙 韦瑞荣 余邦拓 刘振侠[1] ZHANG Lifen;GE Xin;HU Xinglong;WEI Ruirong;YU Bangtuo;LIU Zhenxia(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;Key Laboratory of Power Transmission Technology on Aero-engine,Aero Engine Corporation of China,Shenyang 110015,China)

机构地区：[1]西北工业大学动力与能源学院,西安710072 [2]中国航空发动机集团有限公司航空发动机动力传输重点实验室,沈阳110015

出　　处：《航空动力学报》2024年第10期12-20,共9页Journal of Aerospace Power

摘　　要：采用体心立方结构和Kelvin结构重建金属海绵的胞体结构,分析比较了单相流和两相流下金属海绵内部阻力、不同切角时金属海绵内部阻力。结果表明:①体心立方结构能够达到的孔隙率e的范围为68.01%<e<98.01%;而Kelvin结构能够达到的孔隙率的范围为72.1%<e<98.7%;②油滴质量分数为9.1%、进口速度小于20 m/s时,两相流计算的压降比单相流计算的压降高约5%;③切向角为30°的Kelvin结构金属海绵与实际金属海绵的阻力特性一致性较高,能够较好地表征金属海绵的阻力特性。The cell structure of the metal foam was reconstructed using the body-centered cubic structure and Kelvin structure,respectively,and the internal resistances of the metal foam under singlephase flow and two-phase flow at different cutting angles were analyzed and compared.The results showed that:1)the body-centered cubic structure can achieve a porosity e range of 68.01%<e<98.01%;while the Kelvin structure can achieve a porosity range of 72.1%<e<98.7%;2)the pressure drop calculated by two-phase flow was about 5%higher than that calculated by single-phase flow when the mass fraction of oil droplets was 9.1%and the inlet velocity was less than 20 m/s;3)the resistance characteristics of the Kelvin structure metal foam with a cutting angle of 30°were in high agreement with those of the actual metal foam,and can better characterize the resistance characteristics of the metal foam.

关 键 词：金属海绵 阻力特性 体心立方结构 Kelvin结构 离心通风器 

分 类 号：V233.4[航空宇航科学与技术—航空宇航推进理论与工程]