Journal of Dalian Maritime University >
2017 , Vol. 43 >Issue 3: 63 - 70
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2017.03.011
Numerical study for the influence of stator tip clearance height on compressor performance
Received date: 2017-05-08
Revised date: 2017-05-31
Online published: 2017-05-31
Through the CFD numerical simulation method, transonic compressor stator tip clearance height of modification in the near stall condition was discussed, including the influence of the compressor stator aerodynamic performance which set different clearance with 50 percentage of chord and different height at the top, respectively. Results demonstrate that the leakage flow produced by the clearance of the blade tip clearance can blow away the low energy fluid in the suction and corner region under near stall condition, suppress the separation of the suction side, and reduce the blockage of convection. Hence, the ability of pressure expansion and flow capacity of the stator blade passage were improved. However, under design condition, flow loss was increased and efficiency of compressor was reduced because of leakage flow. Stator tip front clearance height on the compressor affects the performance of compressor seriously. With the enlargement of clearance, the leakage flow increases, the leakage vortex expands, and loss increases. If the gap is too small, the inhibition effect of the leakage current on corner separation is not obvious. Hence, there exists a best value for the gap.
Key words： tip clearance height; leakage vortex; corner separation; stall
XU Wen-feng , SUN Peng , ZHONG Jing-jun . Numerical study for the influence of stator tip clearance height on compressor performance[J]. Journal of Dalian Maritime University, 2017 , 43(3) : 63 -70 . DOI: 10.16411/j.cnki.issn1006-7736.2017.03.011
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