The performance improvement of axial flow fan with large tip clearance by using winglet

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Chan, Lee^1 ; Kil, Hyun Gwon^1 ; Kim, Hyo Sang^1 ; Yeo, Hwan Geol^2

Dept. of Mech. Eng., Univ. of Suwon, Hwaseong, Gyeonggi, Korea, Republic of^1

RandD Department, Korea Amass Corp., Gimpo, Gyeonggi, Korea, Republic of^2

关键词: Axial flow fan;    CFD technique;    Fan performance;    Performance improvements;    Performance measurements;    Secondary vortex;    Static pressure;    Tip clearance flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/5/012009/pdf
DOI  :  10.1088/1755-1315/186/5/012009

来源: IOP

【 摘 要 】

An axial flow fan is designed with large tip clearance by using the FANDAS code and then is manufactured by 3-D printer. The fan performance curve is measured by chamber-type test facility, and the measured fan flow capacity and static pressure are much lower than the design values. Through the application of CFD technique to the designed fan, it is shown that the fan performance deterioration results are due to the leakage and the secondary vortex flows through large tip clearance. In order to control the tip clearance flow, the present study employs fan blade equipped with winglet. The CFD analysis results of the fan with winglets show no leakage and secondary vortex flow through tip clearance and performance measurement results also show the performance improvements of flow capacity and static pressure by 300 CMH and 1.3 mmAq compared with the fan without winglets.