INVESTIGATION ON THE PERFORMANCE OF AN ISOLATED AXIAL COMPRESSOR BY UTILIZING UNSTEADY EXCITATION TO CONTORL TIP CLEARANCE FLOW
The paper investigates unsteady tip clearance flow patterns and effects of unsteady excitations, which are set on the compressor blade tip to control the unsteady tip clearance flow with periodic suction and blowing, on the performance of an isolated axial compressor by utilizing a three-dimensional, time-accurate, Reynolds-averaged Navier-Stokes solver. The CFD simulations demonstrates that the tip clearance flow pattern,which manifests itself as an interacting cross- and through-flow in the tip region, can become periodically oscillatory in a range of operating conditions near stall. Given the equal frequency of the unsteady excitation and the tip clearance flow, increasing the amplitude of the unsteady excitation can lead to improved compressor overall performance. At the same unsteady excitation amplitude, the compressor has an approximately monotonic increase in the overall performance with the increase of the unsteady excitation frequency, and the improved compressor performance can keep approximately constant in a wider range of the unsteady excitation frequency.
Hongwu Zhang Xiangyang Deng Jingyi Chen Weiguang Huang
Institute of Engineering Thermophysics, Chinese Academy of Sciences Beijing 100080, China
国际会议
昆明
英文
514-522
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）