Browse > Article
http://dx.doi.org/10.5293/KFMA.2002.5.2.036

An Analysis of the Unsteady Flow-Field and Aerodynamic Sound of a Turbo Fan used in a Vacuum Cleaner  

Jeon, Wan-Ho (LG전자 DA연구소)
Kim, Chang-Joon (LG전자 DA연구소)
Rew, Ho-Seon (LG전자 DA연구소)
Publication Information
The KSFM Journal of Fluid Machinery / v.5, no.2, 2002 , pp. 36-42 More about this Journal
Abstract
A new method to calculate the aeroacoustic pressure of a centrifugal fan that is used in a vacuum cleaner has been developed. The centrifugal fan consists of the impeller, the diffuser, and the circular casing. Due to the high rotating speed of the impeller and the small gap distance between the impeller and diffuser, the centrifugal fan makes very high noise levels at BPF and its harmonic frequencies. In order to calculate the sound pressure of a centrifugal fan, the unsteady flow field data is needed. This unsteady flow field is calculated by the vortex method. The sound pressure is then calculated by acoustic analogy. In this paper, only dipole term is considered in the equation. The noise generated by moving impeller and stationary diffuser is calculated separately. The predicted acoustic pressures agree very well with the measured data. The difference between the two is less than 4dB
Keywords
Centrifugal Fan; Fan Noise; Unsteady flow; Acoustic prediction; Vacuum Cleaner;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Cudina M., Prezeli J., 2001, "Noise generation by rotating stall and surge in a vacuum cleaner suction unit," The 8th International Congress on Sound and Vibration, pp. 471-478.
2 Jeon, W. H, Lee, D. J., 1999, "An Analysis of the flow and aerodynamic acoustic sources of a centrifugal impeller," Journal of Sound and Vibration, vol. 222, No. 3, pp. 505-511   DOI   ScienceOn
3 Lawson, M. V., 1965, "The Sound Field for Singularities in Motion," Proc. R. Soc. Landon, Sei. A. 286, pp. 559-572   DOI
4 Jeon, W. H., Lee, D. J., 2000, "An analysis of generation and radiation of sound for a centrifugal fan," SEVENTH INTERNATIONAL CONGRESS ON SOUND AND VIBRATION, Germany, pp. 1235-1242.
5 Lauchle, G., Brungart, T., 2000, "Modifications of a vacuum cleaner for noise control," The 29th international congress on noise control engineering
6 Sugimura, K., Watanabe, M., 2000, "A study on suppressing acoustic resonance of interaction tones from a centrifugal motor fan," The 7th International Congress on Sound and Vibration, pp. 1259-1266.
7 전완호, 이덕주, 2001, "웨지가 있는 원심 임펠러의 유동 및 방사 음향장 해석(I)," 대한기계학회논문집 (B), 제 25권 제 9호, pp. 1157-1164.   과학기술학회마을