Impact of Hub Clearance on Endwall Flow in a Highly Loaded Axial Compressor Stator
Impact of Hub Clearance on Endwall Flow in a Highly Loaded Axial Compressor Stator
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DOI：
10.1115/gt2013-95463
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
C. Beselt;D. Peitsch;R. V. Rennings;F. Thiele
中科院分区：
文献类型：
--
作者：
C. Beselt;D. Peitsch;R. V. Rennings;F. Thiele
本文研究了高叶片负荷下不同轮毂间隙处二次流结构的发展和相互作用。三维数值计算进行了三个水平的轮毂间隙，从零到3%的叶片弦。在1%和3%弦毂间隙下的实验结果来评估数值预测的有效性。实验和数值结果提供了二次流结构的发展、相互作用和间隙流对高叶片负荷的影响的详细图景。因此，比较了试验装置和数值模拟得到的时间平均流动特征。此外，本研究试图通过分析轮毂前缘区域的二次流结构来解释该压气机定子在特定工作点和不同轮毂间隙时的旋转不稳定现象。ASME版权所有©2013
Within the present paper the development and interaction of secondary flow structures at different hub clearance gaps at high blade loadings are investigated. Three-dimensional numerical computations were carried out at three levels of hub clearance, ranging from zero to 3% of blade chord. Experimental results at 1% and 3% chord hub clearance were obtained to asses the validity of the numerical predictions. The experimentally and numerically obtained results provide a detailed picture of the development, the interaction of secondary flow structures and the influence of clearance flow for high blade loading. Therefore the time averaged flow features obtained from the experimental test rig and from numerical simulations are compared. In addition this investigation tends to explain the phenomenon of rotating instability for this compressor stator at a specific operating point and different hub clearance gaps by analyzing the secondary flow structures in the leading edge region at the hub.Copyright © 2013 by ASME