Unsteady Flow Variability Driven by Rotor-stator Interaction at Rotor Exit |
| |
Authors: | ZHAO Bena YANG Ce a CHEN Shan a QI Mingxu a ZHOU Mib a |
| |
Institution: | School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China bBasic Subject Department, Bohai Shipbuilding Vocational College, Huludao 125000, China |
| |
Abstract: | Numerical investigation of the unsteady flow variability driven by rotor-stator interaction in a transonic axial compressor is performed. Two models with close and far axial gap between rotor and stator rows are studied in the simulation. Particular atten- tion is attached to the analysis of mechanisms involved in driving rotor wake oscillation, rotor wake skewing and flow angle fluctuation at rotor exit. The results show that smaller axial gap is favorable to enhance the interaction in the region between two adjacent rows, and the fluctuation of the static pressure difference between two sides of rotor wake is improved by potential field from down stator, which is the driving force for rotor wake oscillation. The interaction between rotor and stator is weakened by increasing axial distance, rotor wake shifts to suction side of rotor blade with 5%-10% of rotor pitch, the absolute value of flow angle at rotor exit is less than that in the case of close interspace for every time step, and the fluctuation amplitude is also decreased. |
| |
Keywords: | transonic compressor numerical simulation rotor-stator interaction unsteady flow wake oscillation |
本文献已被 CNKI ScienceDirect 等数据库收录! |
| 点击此处可从《中国航空学报》浏览原始摘要信息 |
| 点击此处可从《中国航空学报》下载免费的PDF全文 |
|