静子叶根封严篦齿齿腔三维流动结构分析  

Analysis of Three-dimensional Flow Structure in Root of Stator Cotyledons

作　　者：许莹莹 傅鑫[1] XU Yingying;FU Xin(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2020年第4期113-115,132,共4页Machine Building & Automation

摘　　要：针对压气机静子封严结构进行三维数值模拟,研究不同齿腔结构时篦齿的封严效果以及齿腔内泄漏流流动机理。结果表明,齿腔流动结构分齿尖射流区与齿腔回流区,其随工况变化有3种流动结构,流动结构越复杂,泄漏流与齿腔内流体能量交换越激烈,泄漏系数越小,泄漏系数最大相差2.9%,泄漏流流量最大相差3.1%。In this paper,there-dimensional numerical simulation of three-tooth seal structure of a compressor is done and the sealing effect and leakage flow mechanism of labyrinth seals are studied.Results show that the flow structure in the tooth cavity is divided into the tooth tip jet flow area and the tooth cavity reflux area.There are three kinds of flow structures with the change of the reflux area condition.The more complex flow structure,the leakage flow and cavity fluid energy exchange more intensely,the leakage coefficient is smaller,and the maximum leakage coefficient differs by 2.9%and leakage flow differs by 3.1%.

关 键 词：压气机 静子 齿腔结构 数值模拟 

分 类 号：V232[航空宇航科学与技术—航空宇航推进理论与工程]