Unsteady Flow Variability Driven by Rotor-stator Interaction at Rotor Exit  

作　　者：ZHAO Ben YANG Ce CHEN Shan QI Mingxu ZHOU Mi 

机构地区：[1]School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China [2]Basic Subject Department, Bohai Shipbuilding Vocational College, Huludao 125000, China

出　　处：《Chinese Journal of Aeronautics》2012年第6期871-878,共8页中国航空学报（英文版）

基　　金：National Natural Science Foundation of China (51176013);Ph.D. Programs Foundation of Ministry of Education of China (20091101110014);National High-tech Research and Development Program of China (2007AA050502)

摘　　要：Numerical investigation of the unsteady flow variability driven by rotorstator 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 attention 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.

关 键 词：transonic compressor numerical simulation rotor-stator interaction unsteady flow wake oscillation 

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] O357.1[理学—流体力学]