摘要
对四风机机组进行CFD仿真分析,结果表明,垂直气流横断面上的速度分布与风机的气流分布有一定的关联,若风机对称分布,气流相应也会对称分布;距离风机越远的横断面,其速度分布越均匀;表冷器盘管具有导流作用,且其空气侧压降越大,出风面速度越均匀。在过气流方向的截面上,风机内的速度最大;风机出口处,由于气流截面突变,气流速度变化率最大,会产生剧烈的紊流。
A four-fan air handling unit is analyzed with the CFD simulation.The results show that the velocity distributed on the outlet surface is connected with the fans＇ layout.If the fans are configured symmetrically,the velocity distribution is regular as well.The farther the section is from the fans,the more even the velocity distribution is.The cooling coil acts as a diffuser also,and the greater the air resistance is,the more even the velocity distribution on the down-stream coil surface is.On the section through the fans＇ axial,the velocity reaches maximum at the fans＇ inside of inlet cone.At the outlet of the fan,velocity rate is maximized since the cross section is expanded suddenly,and air flow is sharp and turbulent.
出处
《制冷与空调》
2012年第3期64-67,共4页
Refrigeration and Air-Conditioning
关键词
多风机
速度分布
CFD仿真
分析
multi-fan
velocity distribution
CFD simulation
analysis
