Investigation study on the flow-induced noise by winglet and shroud shape of an axial flow fan at an outdoor unit of air conditioner

被引：2
|
作者：
Tae-Gyun Lim
Jae Hyuk Jung
Wan-Ho Jeon
Won-Gu Joo
Gaku Minorikawa
机构：
[1] Technical Research Lab.,Air Solution Lab.
[2] CEDIC Co.,School of Mechanical Engineering
[3] LG Electronics Co. Ltd.,Department of Mech. Eng., Faculty of Science and Engineering
[4] Yonsei University,undefined
[5] Hosei University,undefined
来源：
Journal of Mechanical Science and Technology | 2020年 / 34卷
关键词：
Axial flow fan; CAA (computational aeroacoustics); CFD (computational fluid dynamics); Flow-induced noise;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Axial flow fans of outdoor units are equipped with specially shaped winglets and shroud for reduction of the flow-induced noise. In this study, the unsteady state flow field and the characteristics of the flow-induced noise according to the application of the sweptback tip winglets and 30 % covered shroud in an axial flow fan of an outdoor unit of air conditioner were experimentally and numerically analyzed. To analyze the unsteady flow field, large eddy simulation (LES) reflecting the geometry of complicated outdoor unit was performed; and the LES results were used by simplified Ffowcs Williams and Hawkings (FW-H) equation in order to calculate the noise numerically. As a result, asymmetric flow characteristics inside the outdoor unit by the mount and the shape of blade tip and shroud were found to cause inconsistent movement of the tip leakage vortex, which was revealed to change the characteristics of the flow-induced noise.
引用
收藏
页码：2845 / 2853
页数：8
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