小流量系数离心压缩机级的泄漏及轮阻损失的数值研究  

Numerical Study on Stage Leakage and Disc Friction Loss of Small Flow Coefficient Centrifugal Compressor

作　　者：于学智 闻苏平[1] 胡小文 王志恒[1] 杜俊杰 王懿 Xue-zhi Yu;Su-ping Wen;Xiao-wen Hu;Zhi-heng Wang;Jun-jie Du;Yi Wang(School of Energy and Power Engineering,Xi’an Jiaotong University;Shenyang Blower Works Group Corporation;Corporate Research Center,Midea Group)

机构地区：[1]西安交通大学能源与动力工程学院 [2]沈阳鼓风机集团股份有限公司 [3]美的集团中央研究院

出　　处：《风机技术》2022年第5期21-30,共10页Chinese Journal of Turbomachinery

基　　金：国家自然科学基金项目(52176044)。

摘　　要：本文对小流量系数离心式压缩机叶轮轮盘和轮盖外侧间隙及迷宫密封结构进行数值研究,研究结果表明:由于两侧间隙内泄漏气体的流动规律不同,泄漏气体的流量在轮盖侧间隙内大于在轮盘侧间隙内。研究建立了计算泄漏量的经验公式,经验公式所采用的空腔F2因子取值范围为0.74~0.76,与Stepanoff等的研究结果非常接近。在考虑叶轮出口气体预旋对旋转圆盘扭矩系数的影响,建立了计算旋转叶轮外侧面的扭矩系数的经验公式,并在不同机器马赫数下验证了其可靠性与准确性。This paper simulates the impeller disc,outer clearance of small flow coefficient centrifugal compressor and labyrinth sealing structure,and shows the flow rate of the leakage gas in the gap of the shroud side is bigger than that in the gap of the disc side due to the different flow law.The study has established an empirical formula for calculating leakage with the F 2 factor of the cavity,ranging from 0.74 to 0.76,which is very close to Stepanoff's results.Considering the impeller outlet gas Prewhirl,an empirical formula is built to calculate the torque coefficient of the outer surface of the rotating impeller.At the same time,its reliability and accuracy are verified under different Mach numbers.

关 键 词：离心压缩机 离心叶轮 间隙 预旋 轮阻损失 泄漏损失 

分 类 号：TH452[机械工程—机械制造及自动化]