离心压缩机不同结构排汽蜗壳性能分析  

Analysis of Different Exhaust Volute Structures of Centrifugal Compressor

作　　者：王娟丽 王鑫[1] 陶功新[1] 赵海峰[1] 钱禹龙 WANG Juanli;WANG Xin;TAO Gongxin;ZHAO Haifeng;QIAN Yulong(Dongfang Turbine Co.,Ltd.,618000,Deyang,Sichuan,China)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方电气评论》2023年第1期31-34,共4页Dongfang Electric Review

摘　　要：排汽室的性能对离心压缩机经济性影响很大,目前离心压缩机普遍使用切向排汽蜗壳,其排汽蜗壳流场稳定,气动性能较好。排汽蜗壳设计时不仅需要考虑气动性能如总压损失系数、静压恢复系数的高低,同时需要考虑结构紧凑性。本文针对某单级离心压缩机,给出了切向排汽蜗壳设计原理,使用大型3D数值分析软件CFX,对比分析了4种不同结构的排汽蜗壳,得出蜗壳外径一定的条件下,并不是无叶扩压器越长性能越好;无叶扩压器与排汽蜗壳完全相切时性能最佳。The performance of the exhaust volute has great influence on the economy of the centrifugal compressor.At present,the tangential exhaust volute is widely used in the centrifugal compressor.The design of exhaust volute not only needs to consider the aerodynamic performance such as the total pressure loss coefficient and the static pressure recovery coefficient,but also needs to consider the compact structure.In this paper,the design principle of tangential exhaust volute is given,and four kinds of volute with different structures are compared and analyzed by using the 3D numerical analysis software CFX.When the outer diameter of the volute is certain,the best performance is not obtained when the vaneless diffuser is the longest,but when the vaneless diffuser is completely tangent to the exhaust volute.

关 键 词：切向排汽蜗壳 3D数值分析 总压损失系数 静压恢复系数 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]