Effect of inlet box on performance of axial flow fans

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  • School of Energy & Power Engineering, Xi'an Jiaotong University

Published date: 05 Dec 2008

Abstract

Numerical investigations on 3D flow fields in an axial flow fan with and without an inlet box have been extensively conducted, focusing on the variation of fan performance caused by the internal flow fields and the velocity evenness at the exit of the inlet box. It is interesting to find that although the inlet box is well designed in accordance with basic design principles, there is a flow separation region in it. Furthermore, this flow separation and the resulting uneven velocity distribution at the exit lead to some decrease in the efficiency and an increase in the total pressure rise of the fan. This research shows that the inlet box needs further improvement and such a check on the flow fields is of value for the design of inlet boxes.

Cite this article

LI Jingyin, TIAN Hua, YUAN Xiaofang . Effect of inlet box on performance of axial flow fans[J]. Frontiers in Energy, 2008 , 2(4) : 390 -394 . DOI: 10.1007/s11708-008-0087-1

References

1. Hu Shengli, Wu Keqi, Cheng Shangmo . The flow field measurement of the inlet box with complexgeometry of fluid machinery using a PAD. Journal of Engineering Thermophysics, 1995, 16(1): 60–64
2. Lu yong, Wang Lijun, Ma Caifen . The experimental study of modification to the inlet boxof a large-scale axial draught fan. FluidMachinery, 1998, 27(7): 8–11
3. Luo yong, Chang bin, Ma Caifen . The influence of the change of axis radius of the inletbox of complex geometry of axial draught fan in fan's performance. Fluid Machinery, 1998, 27(11): 14–18
4. Fu Song, Yu Shumei, Yang Yongzhao . Numerical simulation of flow field in inlet box of centrifugalfan. Journal of North China Electric PowerUniversity, 2003, 30(2): 68–70
5. Wu Keqi, Hu Shengli . Experimental investigationof the internal flow field of rotating impeller passage with inletbox. Journal of Engineering Thermophysics, 1995, 16(3): 295–299
6. Wu Keqi, Lai Huanxin . Numerical analysis of theinternal turbulent flow of a diagonal fan including an inlet box ofcomplex geometry and a rotating impeller. Journal of Engineering Thermophysics, 1998, 19(3): 320–324
7. Neise W, Hoppe G . Effect of inflow conditionon centrifugal fan noise. In: Proceedingsof the First European Symposium on Air Conditioning and Refrigeration.Brussels, 1986, 165–172
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