轴流压气机转子三维非定常流场旋涡流动分析

Analysis of the 3D Unsteady Vortex Flow Inside Axial Flow Compressor Rotor

通过数值模拟,对一个低压压气机转子的非定常流场进行结构分析和频谱分析。通过对于流场时均图和等熵动画图的分析,捕捉到了流场的流动特性和流场中旋涡的存在范围,探索了叶片前缘和尾缘的脱落旋涡以及角涡之间的相互作用,相互影响以及这几种旋涡随时间空间变化的运动规律。对于有脱落现象的旋涡,利用动态演示图估测和频谱分析的方法判定其涡脱落频率,得到了尾缘脱落旋涡和角涡的两种脱落频率。本文的工作为今后采取主动、被动控制,改进压气机的性能提供参考依据。

Based on the structure anal rotor. Throug ysis were conduct analyses of numerical simulation method, frequency spectrum analysis and ed for the three dimensional unsteady flow inside the compressor the time-average flow field and the animated isentropic cartoon, we recognize the characteristics of the flow field ,the existence range of the vortex shedding. The interaction of the leading edge and trail edge vortex and corner vortex was investigated ,and the rule of their development and their effect to each other were also discussed along with the frequency spectrum analysis. For separated flow ,dynamic demonstration graph and spectrum analysis were used to estimate the vortex shedding and corner vortex frequencies. The work can be used as theoretical foundations for active and passive control of compressor to improve its performance.