离心压缩机抽吸扩稳的数值分析  

Numerical Analysis of the Stability Enhancement by Casing Treatment for Centrifugal Compressors

作　　者：肖军[1] 赵远扬[1] 舒悦[1] 

机构地区：[1]合肥通用机械研究院,压缩机技术国家重点实验室,安徽合肥230031

出　　处：《风机技术》2016年第5期49-53,87,共6页Chinese Journal of Turbomachinery

基　　金：国家973计划课题“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”(2012CB026001)

摘　　要：以数值计算的方式研究了某离心压缩机两种抽吸式机匣处理对其扩稳性能和流场分布的影响。结果表明,抽吸槽能抽走其附近机匣区域的低速流体,改善流动状况,从而显著提高压缩机的喘振裕度。在近失速工况下,单纯抽吸的方案比抽吸-喷射方案获得了更高的效率和压比,且扩稳效果略好。两种扩稳方案下,抽吸位置靠前的结构在不影响扩稳能力的情况下均获得了更高的效率。对于单纯抽吸的方案,较大的抽吸量实现了更高的压比,但同时也使效率更低。The influence of two types of casing treatment on the stability enhancement and velocity distribution are investigated by numerical simulations. The results indicate that a bleeding slot improves the through-flow conditions by removing the low-momentum fluid nearby the endwall region and hence obviously increases the surge margin of the compressor. For operating conditions near stall, the application of pure bleeding yielded higher efficiency and pressure ratio than the application of bleeding-injection, shining the bleeding location upstream, a higher efficiency of the compressor is obtained for both types of casing treatment without an obvious reduction of the stability enhancement. For the application of pure bleeding, a higher mass flow rate of the bleeding can pressure ratio, but it can al lead to higher so reduce the efficiency.

关 键 词：数值计算 离心压缩机 抽吸 扩稳 喘振裕度 

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]