Experimental and numerical study of the sweep effect on three-dimensional flow downstream of axial flow fans

被引:63
作者
Hurault, J. [2 ]
Kouidri, S. [1 ]
Bakir, F. [2 ]
Rey, R. [2 ]
机构
[1] LIMSI CNRS UPMC, F-91403 Orsay, France
[2] Arts & Metiers Paristech, LEMFI, F-75013 Paris, France
关键词
Axial flow fan; Sweep; Hot-wire anemometry; Reynolds stress model; NOISE;
D O I
10.1016/j.flowmeasinst.2010.02.003
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The purpose of this work is to study the influence of the axial flow fan sweep on the downstream turbulent flow. The fans studied are three low-pressure and low-Mach-number axial flow fans, with respectively a radial, a forward and a backward sweep. Experimental and computational fluid dynamics (CFD) investigations are carried out on three fans, and the results are compared. The CFD method is a three-dimensional (3D) Reynolds average Navier-Stokes (RANS) numerical simulation with the Reynolds stress model (RSM) as the turbulence model. It allows us to compute the Reynolds stress tensor components. Unsteady velocity measurements are carried out downstream of the fans with hot-wire anemometry. The values of the three velocity components of the flow and the six components of the Reynolds stress tensor obtained from experiments and simulations are compared. Overall performances are also measured to validate the design and fan simulation. It appears that a forward sweep decreases the radial component of the velocity whereas a backward sweep increases this component. Moreover, the sweep has a significant influence on the turbulent kinetic energy downstream of the fan. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:155 / 165
页数:11
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