摘要
针对凹槽叶尖流动机理及组织方法,考虑冷却的凹槽叶尖气动与传热特征分析和凹槽叶尖泄漏流动的模化等相关工作的研究进展进行了简要总结。已有的研究表明:凹槽内部的流动对传热有明显的影响;凹槽内的冷却气与泄漏流动存在较强的相互作用,合理的凹槽形状和喷气孔位置可以有效提升叶尖的气动效率并降低热负荷;叶尖的加工和气动参数的不确定性会显著影响凹槽叶尖性能;通过对凹槽内流动结构进行模化,得到的考虑喷气的可压缩条件下的凹槽叶尖性能预测模型经过了实验和数值模拟的结果验证,可以有效评估凹槽叶尖性能,并为工程设计提供参考。
According to the flow mechanism and organization method of squealer tip, the analysis of aerodynamic and heat transfer characteristics of squealer tip considering cooling, and the modeling of leakage flow of squealer tip were summarized. The results showed that the flow inside the cavity had an obvious effect on the heat transfer. There was a strong interaction between the cooling gas in the cavity and the leakage flow. Reasonable cavity shape and jet hole position can effectively improve the aerodynamic performance and reduce the heat load of the blade tip;The uncertainty of blade tip machining and aerodynamic parameters could significantly affect the performance of squealer tip. By modeling the vortex structure in the cavity, the performance prediction model of the squealer tip considering the compressibility of air jet was verified by experiment and numerical simulation results. The model can effectively evaluate the performance of the squealer tip and provide a reference for engineering design.
作者
邹正平
轩笠铭
付超
ZOU Zhengping;XUAN Liming;FU Chao(Research Institute of Aero-Engine,Beihang University,Beijing 102206,China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,Beihang University,Beijing 102206,China;School of Energy and Power Engineering,Beihang University,Beijing 102206,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2022年第11期2560-2573,共14页
Journal of Aerospace Power
基金
国家科技重大专项(J2019-Ⅱ-0012-0032)
重点实验室基金一般项目(6142702200203)。
关键词
高压涡轮
凹槽叶尖
泄漏流动
流动组织
传热特性
不确定性
流动建模
high pressure turbine
squealer tip
tip leakage flow
flow organization
heat transfer characteristic
uncertainty
flow modeling
作者简介
邹正平(1970−),男,教授、博士生导师,博士,主要从事高超声速航空发动机、叶轮机气体动力学研究。E-mail:zouzhengping@buaa.edu.cn。
