超高负荷串列转子尖部流场结构的实验和数值研究  

Experimental and Numerical Study on Tip Leakage Flow of Highly Loaded Tandem Rotor

作　　者：刘宝杰[1,3] 王高伟 安广丰 于贤君 LIU Baojie;WANG Gaowei;AN Guangfeng;YU Xianjun(Research Institute of Aero-Engine,Beihang University,Beijing 100191,China;China Academy of Aerospace Aerodynamics,Beijing 100074,China;National Key Laboratory of Science and Technology on Aero-Engines,Beijing 100191,China)

机构地区：[1]北京航空航天大学航空发动机研究院,北京100191 [2]中国航天空气动力技术研究院,北京100074 [3]航空发动机气动热力国防科技重点实验室,北京100191

出　　处：《工程热物理学报》2023年第2期332-341,共10页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51806004,No.51790511);国家科技重大专项资助项目(No.J2019-Ⅱ-0003-0023)。

摘　　要：串列转子尖部存在着前/后叶叶尖泄漏流以及前叶尾迹等流动,流动结构较为复杂,准确判断这几股流动之间的相互作用成为分析流场的关键。本文分别通过实验和数值模拟方法对基于北京航空航天大学低速大尺寸单级压气机试验台设计的一套超高负荷串列转子尖部流场进行了研究。研究结果表明:对于本文所研究的高负荷串列转子,无论是在设计点还是近失速点,前叶叶尖泄漏涡在前叶出口时都已经到达前叶压力面附近,随后紧贴后叶吸力面从喉道进入后叶通道,在喉道内顺压梯度的作用下,前叶叶尖泄漏涡的旋涡特性增强,并在后叶通道内将相对较弱的后叶叶尖泄漏涡吞并;相对于常规布局转子,由于在前后叶喉道顺压梯度的作用下,串列转子内叶尖泄漏涡的稳定发展阶段都有所延长,这有利于减小叶尖泄漏涡造成的转子尖部流动堵塞。Front/rear tip leakage flow and front blade wake flow exist in the tandem rotor, and the flow structure is relatively complex. It is the key to analyze the flow field to accurately judge the interaction between these flows. In this paper, the tip flow field of the highly loaded tandem rotors designed by Beihang university LSLSAC is studied by experimental and numerical simulation methods. The results show that: For the tandem rotor studied in this article, both at the DE and NS, the tip leakage vortex of the front blade has reached the vicinity of the pressure surface of the front blade in the front blade exits, and close to the suction surface of the rear blade from the throat into the channel, The vortex characteristics of tip leakage vortex are enhanced under the effect of the favorable pressure gradient in the throat, and the relatively weak tip leakage vortex of the rear blade is absorbed in the rear blade channel. Compared with the conventional rotor, the stable development stage of tip leakage vortex in the tandem rotor is prolonged due to the effect of the favorable pressure gradient in the throat, which is beneficial to reduce the flow blockage at the rotor tip caused by the tip leakage vortex.

关 键 词：串列转子 超高负荷压气机 叶尖泄漏流 实验研究 

分 类 号：O354.5[理学—流体力学]