Influence of Chord Lengths of Splitter Blades on Performance of Small Axial Flow Fan
Guoqi Li1, Lifu Zhu1, Yongjun Hu1, Yingzi Jin*, 1, Toshiaki Setoguchi2, Heuy Dong Kim3
Identifiers and Pagination:Year: 2015
First Page: 361
Last Page: 370
Publisher Id: TOMEJ-9-361
Article History:Received Date: 8/1/2015
Revision Received Date: 15/1/2015
Acceptance Date: 16/1/2015
Electronic publication date: 25/6/2015
Collection year: 2015
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
On the basis of small axial fan with five blades, 6 types of small axial flow fans with different chord lengths splitter blades were designed. Numerical simulation of 6 fan models with splitter blades and prototype fan were done by using Fluent. Based on the obtained simulation results, internal flow characteristics and aerodynamic noise were analyzed and compared. It indicates that: splitter blades with suitable chord length have improved significantly on internal flow characteristics, which inhibits backflow from pressure surface to the suction surface at blade tip and leading edge and restrains flow separation. The 6 model fans are better than prototype fan on aerodynamic noise improvement, but too long or too short chord lengths are both disadvantage to improve aerodynamic noise. The results reveal that 2/6, 3/6 and 4/6 chord length model have relatively better acoustic characteristics and internal flow characteristics. The research program will offer a reference for structural improvements and noise reduction on small axial flow fan.