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Open AccessArticle

Unsteady Characteristics of Forward Multi-Wing Centrifugal Fan at Low Flow Rate

1
National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Zhejiang Sci-Tech University, Hangzhou 310018, China
2
Zhejiang Yilida Ventilator Co., Ltd., Taizhou 318056, China
*
Author to whom correspondence should be addressed.
Processes 2019, 7(10), 691; https://doi.org/10.3390/pr7100691
Received: 8 August 2019 / Revised: 24 September 2019 / Accepted: 26 September 2019 / Published: 2 October 2019
(This article belongs to the Special Issue CFD Applications in Energy Engineering Research and Simulation)
The unsteady flow characteristics of a forward multi-wing centrifugal fan under a low flow rate are studied using the computational fluid dynamics (CFD) method. This paper emphasizes the eddy current distribution in terms of the Q criterion method, as well as pressure fluctuation, frequency spectrum, and kinetic energy spectrum analysis of internal monitoring points in a forward multi-wing centrifugal fan. The numerical results show that abnormal eddies mainly appear at the volute outlet and near the volute tongue, boundary layer separation occurs near the suction surface of the blade, and shedding eddies appear at the trailing edge of the blade with the time evolution. The unsteady flow characteristics of a forward multi-wing centrifugal fan at a small flow rate provide significant physical insight into understanding the internal flow law. View Full-Text
Keywords: centrifugal fan; large eddy simulation; unsteady flow; pressure fluctuation; frequency spectrum centrifugal fan; large eddy simulation; unsteady flow; pressure fluctuation; frequency spectrum
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MDPI and ACS Style

Lun, Y.; Ye, X.; Lin, L.; Ying, C.; Wei, Y. Unsteady Characteristics of Forward Multi-Wing Centrifugal Fan at Low Flow Rate. Processes 2019, 7, 691.

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