离心式压缩机吸气室设计改进  

Improved Design of Centrifugal Compressor Inlet Volute

作　　者：王丽丹[1] 谭佳健[1] 高阳[1] 李艳伟[1] 

机构地区：[1]沈阳鼓风机集团股份有限公司,辽宁沈阳110869

出　　处：《风机技术》2016年第3期50-54,共5页Chinese Journal of Turbomachinery

基　　金：国家973计划(课题名称:多干扰复杂工况下压缩机系统的非稳定边界条件及性能变化规律课题编号:2012CB026001)

摘　　要：吸气室是离心式压缩机的重要静止元件之一,其结构对压缩机整机性能有较大影响。本文基于数值计算的方法,对一台离心式压缩机吸气室内的流场进行分析,认为其进气通道与螺旋通道交界处的结构是引起压缩机级效率下降的主要原因之一,并对该处结构进行改进。将吸气室风筒由直筒形式改为渐扩形式,并对比分析了不同渐扩结构模型的流场。结果表明,改进后吸气室内的流场明显改善,吸气室出口截面流场均匀性提高,总压损失系数降低,吸气室后级多变效率提高5.6%。Inlet volute as one of the static components, plays an important role in centrifugal compressor,because its structure affects the compressor＇s performance. Using CFD numerical analysis, the flow field in an inlet volute was analyzed. The flow field showed the junction structure between the inlet channel and the spiral channel was an important facts which caused the compre- ssor＇s stage efficiency decrease. Based on the flow field, the junction design was improved. The air duct of inlet volute is changed into diverging structure from cylindrical; comparison and analysis of the flow fields to two different diverging structures. The results show improvements in the section flow field as uniformity of volute outlet is improved, and the total pressure loss coefficient decreases. Compared with the original model, the flow field is improved,and the polytropicefficiency of volute increases by 5.6%.

关 键 词：离心压缩机 吸气室 设计改进 数值模拟 

分 类 号：TH452[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]