Optimization design and analysis of centrifugal compressor stator vane shape

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  • (Naval Architecture and Ocean Engineering College,Dalian Maritime University, Dalian  116026,China)

Online published: 2024-02-18

Abstract

In order to investigate the influence of the stator vane passage shape on the internal flow field of a centrifugal compressor, this study focuses on the stator vane of a high-pressure centrifugal compressor. The study employs a method of middle arc line shaping, parametric modeling, and utilizes high-precision surrogate models to expedite the design optimization process. Data mining tools are used to analyze the sensitivity of design parameters and summarize the general design principles for stator vanes. The results show a close correlation between vane shape parameters and isentropic efficiency, with a moderate positive correlation, and strong interrelationships among various shaping variables. Some shaping parameters have a positive effect on static pressure efficiency. The optimal shaping structure indicates that reducing the inlet flow angle of the stator vane can alleviate the formation of separation vortices on the suction side and decreasing the outlet flow angle of the stator vane can reduce flow losses. Increasing the curvature from the middle to the trailing edge of the vane grid can mitigate blockage in the middle of the passage, leading to overall improvements in the performance of the centrifugal compressor's stator vane passage. After shape optimization, the isentropic efficiency at the design point increased by 1.7%, and the pressure ratio increased by 0.1 across the entire operating range.

Cite this article

LI Xiangjun, ZHU Zhengyu , ZHOU qian, HAO Jiaqi . Optimization design and analysis of centrifugal compressor stator vane shape[J]. Journal of Dalian Maritime University, 2024 , 50(2) : 92 -100 . DOI: 10.16411/j.cnki.issn1006-7736.2024.02.010

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