空气动力学学报2012，Vol.30Issue(5)：597-605,9.
位势场与涡轮端区二次流的相互作用机理研究
A mechanism investigation of potential field-secondary flow interactions in turbine endwall regions
摘要
Abstract
The flow in turbomachiney is inherently unsteady, so investigating the unsteady interaction between the downstream pressure field and the end-wall flows is very important for improving the performance of low-aspect-ratio, high-loaded turbine. This paper presents the results of a numerical study of the interaction between the end-wall secondary flow and tip leakage flow of the rotor and the downstream potential field of the stator in a low-aspect-ratio, subsonic turbine. The flow diagrams of tran-sient results were analyzed in detail. The results indicate that the entropy rise and the efficiency at the exit of the rotor blade showed a significant periodic variation due to the unsteady interaction of the downstream pressure field. The periodic variation of the rotor performance is due to the unsteady interactions of the downstream pressure field with the secondary flow vortex and the tip leakage vortex, which has been interpreted using the theory of kinematic vortex transport.关键词
位势场/二次流/非定常相互作用/涡轮端区Key words
potential field/ secondary flows/ unsteady interaction/ turbine endwall分类
航空航天引用本文复制引用
綦蕾,邹正平,刘火星,王雷..位势场与涡轮端区二次流的相互作用机理研究[J].空气动力学学报,2012,30(5):597-605,9.基金项目
国家自然科学基金(51106004) （51106004）
