离心压缩机无叶扩压器的三维失速模型

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (09): 1251-1251.

• 金属学与金属工艺 • 下一篇

离心压缩机无叶扩压器的三维失速模型

沈枫1，竺晓程1，杜朝辉1，陈化2

(1.上海交通大学机械与动力工程学院，上海 200240； 2.霍尼韦尔涡轮技术有限公司，上海 201203)

收稿日期:2010-05-26 出版日期:2011-09-30 发布日期:2011-09-30
基金资助:
上海市学科带头人项目资助

A Three-dimensional Stall Model for Vaneless Diffusers of Centrifugal Compression System

SHEN Feng-1, ZHU Xiao-Cheng-1, DU Chao-Hui-1, CHEN Hua-2

(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China;2. Honeywell Turbo Technologies Co.Ltd., Shanghai 201203, China)

Received:2010-05-26 Online:2011-09-30 Published:2011-09-30

摘要/Abstract

摘要： 提出了一种离心压缩机系统内无叶扩压器失速的三维理论模型.该模型采用线性化的三维欧拉方程分析扩压器内的流体不可压缩流动，采用有限差分法和奇异值分裂(SVD)法进行求解，以预测无叶扩压器失速的临界来流角和失速团相对转速.结果表明，在三维情况下，无叶扩压器失速的临界来流角和失速团相对转速除了受到扩压器几何尺寸的影响以外，还受到扩压器入口流体平均径向速度的轴向分布的影响.与二维模型相比，三维模型所得到的预测结果与实验结果更相符.

关键词: 离心压缩机, 无叶扩压器, 失速, 三维模型

Abstract: A three-dimensional model was presented to study the occurrence of rotating waves in vaneless diffusers of centrifugal compressors. By solving 3D incompressible linearized Euler equations via finite difference method and the singular value decomposition (SVD) technique, the critical inlet flow angle and propagation speed of rotating stall in vaneless diffusers were predicted. The results show that both the critical inlet flow angle and the propagation speed are affected not only by the diffuser geometry, but also by the departure from axial uniform distribution of the undisturbed radial velocity at the diffuser inlet. The predictions of 3D model show a better agreement with experimental results than those of 2D model.

Key words: centrifugal compression system, vaneless diffuser, stall, 3D modeling

中图分类号:

TH452

沈枫1, 竺晓程1, 杜朝辉1, 陈化2. 离心压缩机无叶扩压器的三维失速模型[J]. 上海交通大学学报（自然版）, 2011, 45(09): 1251-1251.

SHEN Feng-1, ZHU Xiao-Cheng-1, DU Chao-Hui-1, CHEN Hua-2. A Three-dimensional Stall Model for Vaneless Diffusers of Centrifugal Compression System[J]. Journal of Shanghai Jiaotong University, 2011, 45(09): 1251-1251.

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离心压缩机无叶扩压器的三维失速模型

A Three-dimensional Stall Model for Vaneless Diffusers of Centrifugal Compression System

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