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http://dx.doi.org/10.5293/KFMA.2006.9.6.009

Performance Characteristics of an Axial Flow Fan According to the Shape of a Hub Cap  

Jang, Choon-Man (한국건설과학기술원 화재설비연구부)
Choi, Seung-Man ((주) 케피코 시스템응용팀)
Kim, Kwang-Yong (인하대학교 기계공학부)
Publication Information
The KSFM Journal of Fluid Machinery / v.9, no.6, 2006 , pp. 9-16 More about this Journal
Abstract
Performance characteristics of an axial flow fan having distorted inlet flow have been investigated using numerical analysis as well as experiment. Two kinds of hub-cap, rounded and right-angled front shape, are tested to investigate the effect of inlet flow distortion on the fan performance. Numerical solutions are validated in comparison with experimental data measured by a five-hole probe downstream of the fan rotor. It is found from the numerical results that non-uniform axial inlet velocity profile near the hub results in the change of inlet flow angle. Large recirculation flow upstream the fan rotor for the right-angled hub-cap induces a negative incidence, thus invokes separated flow on the blade surfaces and deteriorates the performance of fan rotor.
Keywords
Axial Flow Fan; Distorted Inlet Flow; Flow Separation; Hub-Cap; Numerical Simulation;
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