Effects of Fan Speed on Rotating Stall Inception and Recovery

被引:64
作者
Choi, Minsuk [1 ]
Vahdati, Mehdi [1 ]
Imregun, Mehmet [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2BX, England
来源
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME | 2011年 / 133卷 / 04期
基金
英国工程与自然科学研究理事会;
关键词
rotating stall; surge; fan speed; stall hysteresis; stall inception; stall recovery; ACTIVE CONTROL;
D O I
10.1115/1.4003243
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
An implicit, time-accurate 3D compressible Reynolds-averaged Navier-Stokes (RANS) solver is used to simulate rotating stall inception and recovery, the so-called rotating stall hysteresis, in the case of a modern fan geometry. In the first instance, rotating stall was simulated for 70%, 80%, and 90% fan speeds using a whole-annulus fan model with a variable-area nozzle downstream. As the fan speed is increased, the stall cells also increase in size but their number decreases. One large stall cell is predicted to rotate along the annulus at 80% and 90% speeds, while there are three smaller cells at 70% speed. In all cases, the reverse flow is confined to the near-tip region and the rotating stall does not develop into a full-span stall because of the fan blade's high-aspect ratio. To simulate stall recovery, the nozzle area was increased gradually at 70% and 90% speeds and the flow was seen to recover from rotating stall to reach an unstalled operating condition. The recovery process was found to be affected by the fan speed. At 70% speed, the large disturbances decay first to form almost symmetric stall cells. Thereafter, the stall cells shrink into smaller ones as the mass flow rate increases further. At 90% fan speed, a single stall cell rotates along the annulus, the disappearance of which results in recovery. An attempt has been made to explain the dependence of the stall inception and recovery patterns on the fan speed. [DOI: 10.1115/1.4003243]
引用
收藏
页数:8
相关论文
共 18 条
[1]   A study of spike and modal stall phenomena in a low-speed axial compressor [J].
Camp, TR ;
Day, IJ .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1998, 120 (03) :393-401
[2]  
CHOI M, 2009, P ISUAAAT12
[3]  
CHOI M, J PROPUL PO IN PRESS
[4]  
Cumpsty N. A., 2004, COMPRESSOR AERODYNAM, P359
[5]   ACTIVE SUPPRESSION OF ROTATING STALL AND SURGE IN AXIAL COMPRESSORS [J].
DAY, IJ .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1993, 115 (01) :40-47
[6]   Stall inception and the prospects for active control in four high-speed compressors [J].
Day, IJ ;
Breuer, T ;
Escuret, J ;
Cherrett, M ;
Wilson, A .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1999, 121 (01) :18-27
[7]   THE UNSTABLE BEHAVIOR OF LOW AND HIGH-SPEED COMPRESSORS [J].
DAY, IJ ;
FREEMAN, C .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1994, 116 (02) :194-201
[8]   STALL INCEPTION IN AXIAL-FLOW COMPRESSORS [J].
DAY, IJ .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1993, 115 (01) :1-9
[9]  
Emmons HW., 1955, T AM SOC MECH ENG, V77, P455
[10]   Experiments in active control of stall on an aeroengine gas turbine [J].
Freeman, C ;
Wilson, AG ;
Day, IJ ;
Swinbanks, MA .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1998, 120 (04) :637-647