Analysis of Noise Characteristic of Uneven Pitch Regenerative Blower Lee, Kyoung-Yong; Jung, Uk-Hee; Kim, Jin-Hyuk; Kim, Cheol-Ho; Choi, Young-Seok; Ma, Jae-Hyun; Jeong, Kyung-Ho; Park, Woon-Jean;
The flow and noise characteristics of the regenerative blower are evaluated experimentally. To decrease the noise of regenerative blower at a high frequency, we arrange the impeller vanes unevenly by special formula. The uneven pitch formular consists of the combination of trigonometric function. The magnitude of degree between each vanes and the control parameters of trigonometric functions are main design parameters for the uneven pitch. The flow characteristics of even and uneven impellers are tested by the fan tester and compared each results. The efficiency of a blower is calculated by the axial power using a dynamo system. The noise property of designed impeller is measured in an anechoic room. In this study, we certify that the uneven pitch impeller is effective in the noise reduction at a high frequency.
Badami, M. and Mura, M., 2012, "Leakage effects on the performance characteristics of a regenerative blower for the hydrogen recirculation of a PEM fuel cell", Energy Conversion and Management, Vol. 55, pp. 20-25.
Lee, C., Kil, H. G., Kim, G. C., Kim, J. G., Ma, J. H., and Chung, K. H., 2013, "Aero-acoustic Performance Analysis Method of Regenerative Blower," The KSFM Journal of Fluid Machinery, Vol. 16, No. 2, pp. 15-20.
Kim, J. K., Lee, K. Y., Lee, C., Kil, H. G., Chung, K. H., and Hwang, S. M., 2014, "Development of a Low-noise Regenerative Blower for Fuel Cell Application", The KSFM Journal of Fluid Machinery, Vol. 17, No. 2, pp. 48-53.
Moon, Y. J., Cho, Y., and Nam, H. S., 2003, "Computation of unsteady viscous flow and aeroacoustic noise of cross flow fans", Computers & Fluids, Vol. 32, No. 7, pp. 995-1015.
Patent : Apparatus for fluid lnhalation and exhaust (10-2007-0102058).
Jung, U. H., Choi, Y. S., Kwon, O. M., and Lee, K. Y., 2007, "Numerical Analysis of the Performance Influence of Uneven Blade Spacing in Multiblade Turbomachinery", Proceedings of the KFMA Annual Meeting, pp. 109-114.