Active flow control at a 1.5-stage low-speed research compressor with varying rotor tip clearance

被引:2
作者
Kuenzelmann, M. [1 ]
Urban, R. [1 ]
Mailach, R. [1 ]
Vogeler, K. [1 ]
机构
[1] Tech Univ Dresden, Inst Fluid Mech, D-01062 Dresden, Germany
关键词
axial compressor; active flow control; blowing; rotating stall inception; ROTATING STALL; AXIAL COMPRESSOR; SURGE; STABILIZATION; INJECTION; ENGINE;
D O I
10.1177/0957650911418150
中图分类号
O414.1 [热力学];
学科分类号
摘要
The stable operating range of axial compressors is limited by the onset of rotating stall and surge. Mass injection upstream of the tip of an axial compressor rotor is a stability enhancement approach which can be effective in suppressing stall in tip-critical rotors, and thus increasing the operating range of compressors. In this article, investigations on active flow control related to the rotor tip gap sensitivity are discussed. The experiments were performed in a 1.5-stage low-speed research compressor. Measurements at part speed (80 per cent) and full speed (100 per cent) with varying injection rates are discussed. These tests were performed for two rotor tip clearances of 1.3 per cent and 4.3 per cent of rotor blade tip chord. Results on the compressor map, the flow field as well as transient measurements to identify the stall inception are discussed. Supplementary, the numerical results are compared to the experiments based on the configuration with the greatest benefit in operating range enhancement.
引用
收藏
页码:886 / 896
页数:11
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