某双级风扇亚音工况下流动失稳诱因分析  

ANALYSIS OF INDUCED FACTORS OF FLOW INSTABILITY IN A TWO-STAGE FAN UNDER SUBSONIC CONDITION

作　　者：吴艳辉[1] 张卓勋[1] 楚武利[1] 张皓光[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《工程热物理学报》2010年第7期1113-1116,共4页Journal of Engineering Thermophysics

基　　金：航空科技创新基金(No.08B53004);西北工业大学基础研究基金(No.W018101)

摘　　要：以一带减振阻尼台的双级风扇为研究对象,对其亚音工况下的内部流场进行了更为真实的全三维数值模拟。通过对比分析计算和试验的总性能和基元性能可以看出,计算结果很好地再现了试验给出的流动信息。以此为基础对其内部流场进行了详细分析,结果表明第1级动叶叶顶吸力面附面层分离形成的低能气团及其造成的流动堵塞是该双级风扇亚音工况下流动失稳的诱发因素。3D numerical simulation was conducted for an axial two-stage transonic fan with partspan shroud under subsonic condition. The calculated overall and blade element performance lines showed good agreement with the experiments, so detailed flow field analysis was carried out. It was found that the low-energy zone due to separation of boundary layer of the first stage＇s rotor tip and the blocking it caused were the factors leading to flow instability under subsonic condition.

关 键 词：双级风扇 亚音工况 数值模拟 流动稳定性 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]