Influence of blade tip clearance shapes on aerodynamic performance of an axial flow compressor stator
Influence of blade tip clearance shapes on aerodynamic performance of an axial flow compressor stator
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DOI：
10.1243/095765002320877883
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发表时间：
2002-01
期刊：
影响因子：
--
通讯作者：
Z. Wang;X. Jia;R. Cai
中科院分区：
文献类型：
--
作者：
Z. Wang;X. Jia;R. Cai
摘要采用数值方法研究了轮毂静止和旋转状态下不同叶顶间隙形状对轴流压气机静叶气动性能的影响。本文采用非正交曲线坐标系下的三维Navier-Stokes方程和相应的非正交速度分量，采用显式时间推进算法和Baldwin-Lomax湍流模型进行计算。本文所考虑的间隙形状包括均匀的大间隙和小间隙、从叶片前缘到后缘沿轴向沿着膨胀和收缩的间隙。对计算结果的分析表明，至少对于本文中的试验情况，发现静止轮毂情况下叶尖泄漏涡的产生早于旋转轮毂情况。在相同工况下，在一定间隙范围内，叶顶间隙高度越小，效率越高;在周向泄漏面积相同的情况下，叶顶间隙增大的叶排效率越高。
Abstract The influence of different tip clearance shapes on aerodynamic performance of an axial-flow compressor stator under the condition of both stationary and rotating hub was investigated by a numerical method. In this paper, the calculations are based on the three-dimensional Navier-Stokes equations expressed with non-orthogonal curvilinear coordinates and corresponding non-orthogonal velocity components, and the explicit time marching algorithm and Baldwin-Lomax turbulence model are adopted. The clearance shapes considered in this paper include large and small uniform tip clearance, expanding and shrinking tip clearance from the blade leading edge to the trailing edge along the axial direction. The analysis of computed results shows, at least for the test cases in this paper, that tip leakage vortex was found to be generated earlier for stationary hub cases than for rotating hub cases. On the same working conditions and within a certain range of clearance scale, the blade row with smaller tip clearance height can attain higher efficiency, and for the same circumferential leakage area, the blade row with expanding tip clearance was found to have higher efficiency.