轴流压气机内导叶/转子干涉对转子流场的影响  

Impact of IGV/rotor interaction on rotor flow field in an axial compressor

作　　者：弓志强[1] 陆亚钧[1] 李志平[1] 李茂义[1] 

机构地区：[1]北京航空航天大学航空发动机气动热力重点实验室,北京100083

出　　处：《北京航空航天大学学报》2007年第1期32-37,共6页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：叶轮机械内的转静干涉现象多年来一直是一个研究的热点,然而现有的对于转静干涉的研究多局限于对流动现象的描述,缺乏理论指导,因此无法在叶轮机械的设计体系中包含这一非常重要的非定常流动现象,限制了叶轮机械性能的进一步提升.利用流动稳定性及感受性理论来指导对这一问题的研究,能够找到利用这一现象提升叶轮机性能的规律.对于一台单级低速轴流压气机内的导叶/转子干涉现象进行了实验研究.利用二维粒子图像速度仪测量得到了导叶/转子干涉的定量流动细节,及其对于转子流场的影响.结果表明,转子流场在定常来流条件下也表现出显著的非定常性.在引入导叶/转子干涉之后,转子流场结构发生显著变化.动叶尾迹强度明显减弱,叶背流动分离得到抑制,叶尖泄漏涡也得到了周期性的抑制.除了导叶尾迹对动叶流场的干涉作用以及气流角的周期性变化以外,动叶非定常流动对于不同的导叶/动叶干涉激励频率的不同响应是引起压气机性能变化的主要原因.The IGV/rotor interaction phenomenon in turbomachinery has been research focuses for years, but until now such researches have been restricted to qualitative description of flow phenomenon without theory instructions. So this very important unsteady phenomenon can not be included in turbomaehinery design regime to further improve turbomachinery performance. By the theory of flow instability and receptivity, the rule of using this phenomenon to improve turbomachinery performance can be found. The IGV/rotor interaction phenomenon in a one stage low speed axial compressor was investigated experimentally. A 2D digital particle image velocimetry was used to acquire the quantitative flow field structure around the rotor with and without IGV. The rotor flow is evidently unsteady even under steady flow condition. With IGV/rotor interaction, the rotor flow field was changed significantly. The intensity of rotor wakes was side was suppressed and the tip leakage flow was suppressed periodi reduced, flow separation on rotor suction cally. Besides IGV wake interaction and periodic variation in flow angle, different response of the rotor unsteady flow to different unsteady IGV/rotor excitation frequency was decided to be the most important reason for the compressor performance changes.

关 键 词：叶轮机械 轴流压气机 流动可视化 非定常流动 

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]