In order to establish the design methodology of a small axial fan, the axial fan with impeller diameter of 36 mm was designed, manufactured and tested. Especially, in order to investigate the influence of difference in blade cord length and blade thickness on performance characteristics, the performance characteristics obtained by the designed axial fans with difference blade shapes were examined. Also, by using CFD, the same flow field as the experiment was visualized. It was found that the lift of the blade was increased and the performance was improved in high flow rate region by thinning of the blade thickness and by extending the blade chord length.
References
[1]
Ito, T., Minorikawa, G., Nagamatsu, A. and Suzuki, S. (2006) Experimental Research for Performance and Noise of Small Axial Flow Fan (Influence of Parameter of Blade). Transaction of Japan Society Mechanical Engineering B, 72, 670-677.
https://doi.org/10.1299/kikaib.72.670
[2]
Iwase, T., Hioki, T., Kato, Y., Tanno, T., Sekiguchi, O. and Furukawa, M. (2011) Influence of Interaction with Tangential Lean Blade and Box Type Casing on Blade Passing Frequency Noise Level in Small Axial-Flow Fans. Transaction of Japan Society Mechanical Engineering B, 77, 1620-1629.
[3]
Iwase, T., Sugimura K. and Tanno,T. (2009) Study on Improvement of Fan Efficiency in Small Axial-Flow Fans: 1st Report, Designing a High Efficiency Fan by Using Numerical Optimization. Transaction of Japan Society Mechanical Engineering B, 75, 1750-1756.
[4]
Iwase, T., Sugimura, K. and Tanno, T. (2009) Study on Improvement of Fan Efficiency in Small Axial-Flow Fans: 2nd Report, Influence of Tip Leakage Vortex on Static Pressure and Fan Efficiency. Transaction of Japan Society Mechanical Engineering B, 75, 1757-1762.
[5]
Sasajima, T. and Kawaguchi, K. (2011) Numerical Analysis of Flow around Blades in Axial Flow Small Fan. Transaction of Japan Society Mechanical Engineering B, 77, 255-263. https://doi.org/10.1299/kikaib.77.255
