反弹特性对惯性粒子分离器效率的影响  

Influence of Rebound Characteristics on the Separation Efficiency of an Inertia Particle Separator

作　　者：牛佳佳 王锁芳[1] 董伟林[1] 谢买祥[2] NIU Jiajia;WANG Suofang;DONG Weilin;XIE Maixiang(Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;China Aviation Power Plant Research Institute,Zhuzhou 412002,Hunan Province China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏省航空动力系统重点试验室,南京210016 [2]中国航空动力机械研究所,湖南株洲412002

出　　处：《动力工程学报》2018年第7期545-551,共7页Journal of Chinese Society of Power Engineering

摘　　要：为探究粒子反弹特性对发动机惯性粒子分离器分离性能的影响,采用商业软件Fluent研究在不同清除比、进口马赫数下切/法向恢复系数对粒子分离器分离性能的影响,以及切/法向恢复系数对分离效率的综合影响。结果表明:法向恢复系数为0.5时,随着切向恢复系数的增大,在不同进口马赫数和清除比下AC粗尘和C级砂的分离效率均先提高再逐渐稳定;法向恢复系数随进口马赫数的变化而改变,但不受清除比的影响;分离效率达到稳定值时,临界切/法向恢复系数受进口马赫数和颗粒粒径的影响较大。To explore the influence of particle rebound characteristics on the separation efficiency of an engine inertia particle separator,the effects of tangential/normal restitution coefficients on the separation performance were studied using Fluent software at different scavenging ratios and inlet Mach numbers,while their comprehensive influences on the separation efficiency were analyzed.Results show that under the normal restitution coefficient of 0.5,the separation efficiency of both AC coarse dust and C-spec sand increases first and then gets stable with the rise of tangential restitution coefficient at different scavenging ratios and inlet Mach numbers.The normal restitution coefficient changes with Mach number,but is not influenced by Scavenge ratio.The critical tangential/normal restitution coefficients are affected significantly by inlet Mach number and particle diameter when the separation efficiency tends to be stable.

关 键 词：粒子分离器 反弹特性 分离效率 AC粗尘 C级砂 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]