Effect of inlet box on performance of axial flow fans |
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Authors: | Jingyin LI Hua TIAN Xiaofang YUAN |
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Affiliation: | (1) School of Energy & Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China |
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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.
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Translated from Journal of Engineering Thermophysics, 2007, 28 (Suppl.1): 161–164 译自: 工程热物理学报] |
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Keywords: | axial flow fan inlet box fan performance numerical simulation |
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