Influence of Blade Tip Surface Roughness on the Performance of a Single-Stage Axial Flow Compressor

Author:

Kodancha Pradyumna1,Salunkhe Pramod B.1

Affiliation:

1. Department of Aeronautical and Automobile Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India

Abstract

Abstract Numerical investigations are carried out in a single-stage subsonic axial flow compressor to unravel the influence of blade tip surface roughness on the tip leakage flow characteristics and hence the compressor performance. The studies were carried out at different tip clearance of 0.38τ, 0.77τ, 1.15τ, and 1.54τ and blade tip surface roughness of 0.31ε and 0.62ε. The tip clearance of 0.38τ with blade tip surface roughness of 0.62ε resulted in the highest stall margin and pressure rise of 20.3% and 4.3%, respectively. The compressor blade loading was found to be improved by 5.9% after incorporating the blade tip surface roughness. The isosurfaces of vorticity contour plotted using the Q-criterion showed the reduction in strength of the tip leakage vortex. The tip leakage trajectory was found to be shifted toward the suction surface of the blade for the blade tip with surface roughness. This positive alteration in the tip leakage flow structure led to the improved performance for the blade tip with surface roughness.

Publisher

ASME International

Subject

Mechanical Engineering

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Role of wall roughness on interaction of leakage flow and main flow in a mixed flow pump with tip clearance;Physics of Fluids;2024-01-01

2. Performance deterioration of axial compressor rotor due to uniform and non-uniform surface roughness;Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering;2022-03-14

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