大流量系数离心压缩机叶轮及扩压器气动设计与分析

Aerodynamic Design and Analysis of Impeller and Diffuser in a High Flow Coefficient Centrifugal Compressor

本文以流量系数等于0.2的离心压缩机为研究对象,发展了大流量系数离心压缩机的设计与分析方法,完成了该压缩机叶轮+扩压器的一维方案设计、二维子午流道设计和三维叶片设计,并利用CFD软件对所设计的叶轮+扩压器进行了数值验证。结果表明:所发展的设计方法能够用于大流量系数离心压缩机研发,气动性能指标满足设计要求,对进一步优化设计和结构强度分析具有应用价值。

A centrifugal compressor with a high flow coefficient of 0.2 is investigated. A methodology to design and analyze the compressor is developed, i.e., a one-dimensional design of the impeller and diffuser, a two-dimensional meridional flow path design and a three-dimensional design of the impeller, and finally a verification of the impeller and diffuser design by a CFD software. The results confirm that this design methodology can be used for centrifugal compressors with high flow coefficient, such that the aerodynamic performance indicators meet the design requirements. Furthermore, the methodology can be applied to a subsequent design optimization and structural strength analysis.