热科学学报（英文版）2005，Vol.14Issue(3)：211-219,9.
Unsteady Tip Clearance Flow in an Isolated Axial Compressor Rotor
Unsteady Tip Clearance Flow in an Isolated Axial Compressor Rotor
摘要
Abstract
The paper investigates effects of operating conditions, tip clearance sizes and external unsteady excitations on the unsteady tip clearance flow in an isolated axial compressor rotor by unsteady 3D Navier-Stokes simulations. The results show that the unsteady tip clearance vortex takes a periodic flow behavior in the rotor tip region. With the decrease of the flow coefficient, the unsteady tip clearance vortex is enhanced and its frequency becomes lower. A larger tip clearance size can cause bigger unsteady fluctuation amplitude and a lower fluctuation frequency of the tip clearance vortex at the near stall operating condition. The unsteady excitation with the natural frequency of the tip clearance vortex can enhance the unsteadiness of the tip clearance vortex and improve the overall rotor performance. The frequency of the unsteady tip clearance vortex is independent of external unsteady excitations with different frequencies.关键词
tip clearance flow/compressor/unsteadyKey words
tip clearance flow/compressor/unsteady分类
能源科技引用本文复制引用
Hongwu ZHANG,Xiangyang DENG,Jingyi CHEN,Weiguang HUANG..Unsteady Tip Clearance Flow in an Isolated Axial Compressor Rotor[J].热科学学报（英文版）,2005,14(3):211-219,9.基金项目
This work was supported by National Natural Science Foundation of China with project No.50406027. （）
