Influence of inlet airflow maldistribution on performance of double-sided centrifugal induced draft fans

LI Haoran; DONG Kangtian; SHI Qingxin

English

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Influence of inlet airflow maldistribution on performance of double-sided centrifugal induced draft fans

Thermal Power Generation Vol. 46, Issue 5, Pages: 86-90(2017)

更新时间：2025-09-28

- Influence of inlet airflow maldistribution on performance of double-sided centrifugal induced draft fans
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2017
- 稿件说明：
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LI Haoran, DONG Kangtian, SHI Qingxin. Influence of inlet airflow maldistribution on performance of double-sided centrifugal induced draft fans[J]. Thermal Power Generation, 2017, 46(5): 86-90.
DOI：

LI Haoran, DONG Kangtian, SHI Qingxin. Influence of inlet airflow maldistribution on performance of double-sided centrifugal induced draft fans[J]. Thermal Power Generation, 2017, 46(5): 86-90. DOI：

摘要

针对进口气流速度不均导致电站离心式引风机性能恶化问题

借助先进的三维流场分析软件

以在电厂中较为通用的某双吸式离心引风机为研究对象

研究了不同进口气流速度分布对其性能的影响。结果表明:电厂引风机在实际运行过程中

进口气流速度的分布方式对风机性能有重要影响;当进口截面气流速度为均流或接近均流分布时

叶轮进口气流分布均匀

流道涡流少

风机效率较高;当进口截面气流速度分布不均时

叶轮进口气流会产生不同方向的轴向旋转

流道涡流较多

导致风机性能较差。

Abstract

The performance of air fans is deteriorated for inlet airflow maldistribution. To solve this problem

by applying the advanced three dimensional flow field analysis software

the performance of a double-sided centrifugal air fan which is commonly used in power plants was numerically simulated

under conditions with different inlet airflows. The result indicates that

in practical operation

the inlet airflow distribution has great effect on the performance of the double-sided centrifugal air fans. When the inlet velocity is uniform or nearly uniform

the inlet airflow distribution is uniform

the vortex flow is small

and the fan efficiency is high. When the inlet velocity distribution is uneven

axial rotation of the air flow in different directions will occur at the impeller inlet

the vortex flow will increase

resulting in a poor fan performance.

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