离心压气机扩压器造型优化设计与分析

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  • (大连海事大学 船舶与海洋工程学院,辽宁 大连116026)

网络出版日期: 2024-02-18

基金资助

国家自然科学基金面上项目(51906027);辽宁省博士科研启动基金计划项目(2019-BS-027);辽宁省教育厅基本科研项目(No.JYTMS20230160)。

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

摘要

为了研究离心压气机静叶通道造型对通道内部流场影响问题,以某高压离心压气机的静叶为研究对象,借助中弧线造型法、参数化建模与依赖高精度代理模型加速造型优化设计,借助数据挖掘工具分析设计参数敏感性,归纳总结静叶通道的一般设计规律。结果表明,叶型造型参数与等熵效率相关性紧密,呈中度正相关,造型各变量之间相关性强。部分造型参数对静压效率有提升作用。最优造型结构显示减小静叶进口气流角能缓解气流在吸力面分离涡形成,减小静叶出口气流角能降低流动损失,加大叶栅中部至尾缘弯曲程度,可以缓解通道中部堵塞,对离心压气机静叶通道的整体性能具有提高改善作用。造型优化后在设计点仿真计算的级等熵效率提高了1.7%,压比在全工况下整体提高0.1。

本文引用格式

李相君, 朱政宇, 周倩, 郝佳埼 . 离心压气机扩压器造型优化设计与分析[J]. 大连海事大学学报, 2024 , 50(2) : 92 -100 . DOI: 10.16411/j.cnki.issn1006-7736.2024.02.010

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.

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