入口气流对风机墙性能影响的实验与数值研究  

Experimental and Numerical Study on the Effect of Entry Flow on the Performance of Fan Wall System

作　　者：迟劭卿 窦华书[1] 魏义坤[1] 杨徽[1] 陈永宁 叶信学 曹文斌 应存烈 CHI Shao-Qing;DOU Hua-Shu;WEI Yi-Kun;YANG Hui;YE Xin-Xue;CHEN Yong-Ning;CAO Wen-Bin;YING Cun-Lie(Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China;Zhejiang Yilida Ventilator Co. Ltd, Taizhou 318056, China)

机构地区：[1]浙江理工大学机械与自动控制学院,杭州310018 [2]浙江亿利达风机有限公司,台州318056

出　　处：《工程热物理学报》2019年第10期2305-2312,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51536008,No.51579224);浙江省自然科学基金(No.LY14E060003)

摘　　要：风机墙是一种新型的大型集成空调系统,由数个无蜗壳离心风机按照一定的排列组合而成。本文对入口流动条件对风机墙内部流动及其性能产生的影响进行了实验研究和数值模拟。研究发现,入口流动条件对风机墙整体性能影响较大。多台无蜗壳离心风机联合运转时会出现"抢气"现象,会造成入口流量分配不均,使得风机的总功耗增加,静压效率下降。隔离四台风机单元的入口流动条件使得风机墙系统内部流动呈现出了一种良好的稳定状态,并且在非设计流量工况性能得到改善。Fan wall is a new type of ventilation system consisting of regular parallel arrangement of fans units without volute casing.In this paper,the effects of entry flow conditions on the internal flow and performance of the fan wall are studied and simulated.The experimental and numerical results show that as multiple voluteless centrifugal fans share same one entry flow condition,the phenomenon of ’Grab gas5 will occur and the performance of the fan will decrease.This phenomenon makes the total power consumption of the fan increase and the static pressure efficiency decreases.The entry flow conditions of the isolation of the four fan units make the internal flow of the fan wall presents a good state of stability,and the performance of fan wall at off-design conditions is improved.

关 键 词：风机墙 无壳离心风机 入口气流 数值模拟 

分 类 号：TH432[机械工程—机械制造及自动化]