Flow Characteristics with Variations of Cut-Off Angle of Multi-Blade Fan for Ventilation

Title
Flow Characteristics with Variations of Cut-Off Angle of Multi-Blade Fan for Ventilation
Authors
강경준박준건신유환김광호
Keywords
Multi-Blade Fan; Cut-Off Angle; PIV; Velocity Fluctuation; Flow Field; 다익팬; 컥오프 각도; 입자영상속도계; 속도 요동; 유동장
Issue Date
2009-10
Publisher
The 10th AICFM
Abstract
This study investigated on details of flow characteristics of a multi-blade fan for domestic ventilation. Experiments and analysis were carried out to describe on flow pattern with variations of cut-off angle near the scroll- housing throat, which were performed by PIV measurement for the flow field and by total pressure probes. The stagnation point at cut-off region of the fan moves to the exit of the scroll housing as cut-off angle increases. The movement of stagnation point and the variation of throat area of the scroll housing influence to the distribution of velocity magnitude at the exit of the fan. Furthermore, a large distortion of the velocity distribution at the scroll exit causes to increase mixing loss along the flow path. The improvement of the fan design on cut-off is expected through understanding the flow pattern.
URI
http://pubs.kist.re.kr/handle/201004/36448
Appears in Collections:
KIST Publication > Conference Paper
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