Improvements of Inlet Structure and Sweep-Angle of Guide Vane Inside a Centrifugal Compressor at Large Pre-Swirl

doi:10.7652/xjtuxb201711001

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Improvements of Inlet Structure and Sweep-Angle of Guide Vane Inside a Centrifugal Compressor at Large Pre-Swirl

更新时间：2025-07-09

- Improvements of Inlet Structure and Sweep-Angle of Guide Vane Inside a Centrifugal Compressor at Large Pre-Swirl
- Vol. 51, Issue 11, Pages: 1-6+50(2017)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201711001
  CLC： TK123
- Online First：10 November 2017，
  
  Published：2017
- 稿件说明：
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Improvements of Inlet Structure and Sweep-Angle of Guide Vane Inside a Centrifugal Compressor at Large Pre-Swirl[J]. 2017, 51(11): 1-6+50.
DOI：

Improvements of Inlet Structure and Sweep-Angle of Guide Vane Inside a Centrifugal Compressor at Large Pre-Swirl[J]. 2017, 51(11): 1-6+50. DOI： 10.7652/xjtuxb201711001.

摘要

为了解决大预旋下进口导叶诱发流动损失而降低进口预旋调节经济性的问题

将原进口导叶截面中前缘掠角改为相对顶端型线呈前掠

同时将传统衔接进口导叶处进气管道的顶端形状改为锥面。改进结构下进口导叶内部的二次流克服了大预旋下离心力引发的进口轮盘侧的大规模分离状况

改善了叶轮进口段的熵增情况。预旋角分别为+60°、-60°时

改进结构在宽流量范围内可以有效提升离心压缩机多变效率和总压比性能

提升幅值随流量的增大而升高; 在工况范围左边界基本保持不变的情况下

改进结构对大预旋下压缩机工况范围右边界的扩展效果明显。该结果表明

改进结构可以有效提升大预旋下压缩机的性能

具有良好的应用前景及推广潜力。

Abstract

At large pre-swirl

the flow loss induced by the inlet guide vane(IGV)usually degrades the economy of the regulation scheme. Aiming at reducing flow loss at large pre-swirl

the sweep angle at the leading edge of the IGV is changed in forward direction relative to the shroud line. The traditional shape of the shroud of the inlet pipe connecting with the IGV is modified to the cone. The secondary flow initiated within the improved design overcomes the considerable hub flow separation caused by the centrifugal force at the high pre-swirl. The situation of the entropy increase is heightened at the impeller inlet. The new structure efficiently improves the polytropic efficiency and the total pressure ratio of the centrifugal compressor within a wide operation range for the pre-swirl of +60 and -60 degrees. The improvements are enhanced with the increasing flow rate. While the left margin in the operation range remains constant

the right margin obviously widens.

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Keywords

references

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