离心压气机几何参数影响规律及性能优化设计  

Influence Law of Geometric Parameters and Performance Optimization of Centrifugal Compressor

作　　者：张琪 王旭 王琦 汪作心 ZHANG Qi;WANG Xu;WANG Qi;WANG Zuoxin(No.703 Research Institute of CSSC,Harbin,China,Post Code:150078)

机构地区：[1]中国船舶集团有限公司第七○三研究所,黑龙江哈尔滨150078

出　　处：《热能动力工程》2024年第11期12-19,共8页Journal of Engineering for Thermal Energy and Power

基　　金：科技创新特区研究基金项目(22-TQ22-16-TS-01-017)。

摘　　要：本文以带有楔形扩压器的离心压气机为研究对象,利用CFD数值模拟方法,通过改变叶轮的典型几何参数研究离心压气机性能的影响规律并进行参数敏感性分析,综合考虑典型几何参数取值,对压气机气动性能进行优化设计。研究表明:适当降低进出口半径比、相对出口宽度和分流叶片相对长度,合理选择叶片进口角和出口后弯角对提高气动性能有利;几何参数对压比和效率的影响程度排序分别为分流叶片相对长度、出口后弯角、进出口半径比、叶片进口角、相对出口宽度和相对出口宽度、分流叶片相对长度、叶片进口角、出口后弯角、进出口半径比,除相对出口宽度外其余几何参数的改变对压比的影响均大于对效率的影响;优化后的离心压气机稳定工作范围拓宽,压比和效率均有明显提高,设计流量下的压比由5.074提高到5.198,效率由0.8226提高到0.8427。Taking a centrifugal compressor with a wedge-shaped diffuser as the research object,the CFD numerical simulation method was used to study the influence law of typical geometric parameters of the impeller on the performance of the centrifugal compressor and conduct parameter sensitivity analysis.Considering the values of typical geometric parameters,the aerodynamic performance of the compressor was optimized.Research has shown that appropriately reducing the inlet-outlet radius ratio,relative outlet width,and relative length of splitter blades,as well as selecting the appropriate blade inlet angle and outlet back bend angle,are beneficial for improving aerodynamic performance.The degree of influence of geometric parameters on pressure ratio is ranked as follows:relative length of splitter blades,outlet back bend angle,inlet-outlet radius ratio,blade inlet angle and relative outlet width;the degree of influence of geometric parameters on efficiency is ranked as follows:relative outlet width,relative length of splitter blades,blade inlet angle,outlet back bend angle and inlet-outlet radius ratio.The changes in geometric parameters,except for the relative outlet width,have a greater impact on pressure ratio than on efficiency.The optimized centrifugal compressor has expanded its stable operating range,with significant improvements in pressure ratio and efficiency.The pressure ratio at the design flow rate has been increased from 5.074 to 5.198,and the efficiency from 0.8226 to 0.8427.

关 键 词：离心压气机 气动设计 敏感性分析 参数优化 

分 类 号：TH452[机械工程—机械制造及自动化]