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A Numerical Analysis and Experiment for Micro-Fans
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 Title & Authors
A Numerical Analysis and Experiment for Micro-Fans
Cho, Jin-Soo; Pyun, Tae-Kyoon; Park, Wang-Sik; Chun, Chang-Kun;
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 Abstract
A three dimensional linear frequency-domain lifting surface panel method was used for the aerodynamic analysis of axial flow type micro-fans. As proven by the duct modeling, the tip clearance of the micro-fans tested is large enough to ignore the calculated effect of the duct system. As the numerical results and experimental data agreed well in the operating point region, the method was applicable in the parametric studies to determine the design parameters of axial flow fans. Experiments on micro-fans were carried out based on KS B 6311. The newly designed micro-fan showed improvements in both static pressure rise and volumetric flow rate compared to the existing fans at a given operating condition. No detection of surging and the smooth characteristic curve proved the improvement in performance. To reduce the fan noise in the fan design, it was necessary to make use of the frequency spectrum analysis data. Measurement of sound pressure level for micro-fans was conducted based on KS B 6361 and KS A 0705. The peak - which occurs at blade passage frequency and its higher harmonics due to the fan noise - was not detected. This justifies the design methodology of the blade.
 Keywords
Micro-Fan;Flow Coefficient;Static Pressure Coefficient;Sound Pressure Level;
 Language
Korean
 Cited by
 References
1.
Hammond, 1974, C. E., Runyan, H. L., and Mason, J. P., 'Application of Unsteady Lifting Surface Theory to Propellers in Forward Flight,' AIAA Paper No. 74-0419

2.
Williams, M. H., June 1985, 'An Unsteady Lifting Surface Theory For Single Rotation Propellers,' Purdue University Report

3.
Chang, L. K., December 1980, 'The Theoretical Performance of High Efficiency Propellers,' Ph.D.Thesis, Dept. of Aeronautics and Astronautics, Purdue University

4.
Williams, M. H., Cho, J., and Dalton, W. N., 1991, 'Unsteady Aerodynamics Analysis of Ducted Fans,' Journal of Propulsion, Vol. 7, No. 5, pp. 800-804

5.
Huang, W. L., August 1996, 'Unsteady Aerodynamics of Advanced Ducted Fan,' Ph.D. Thesis, Purdue University

6.
공업진흥청, 1982, '송풍기의 시험 및 검사방법,' KS B 6311

7.
공업진흥청, 1987, '송풍기.압축기의 소음 레벨 측정 방법,' KS B 6361

8.
공업진흥청, 1991, '무향실 또는 반무향실에서의 음향 파워 레벨 측정 방법,' KS A 0705

9.
Fukano, T., Takamatsu, Y., and Kodama, Y., 1977, 'Noise Generated by Low Pressure Axial Flow Fans II,' Journal of Sound and Vibration, Vol. 50, No. 1, pp. 75-88 crossref(new window)

10.
Fukano, T., Takamatsu, Y., and Kodama, Y., 1978, 'Noise Generated by Low Pressure Axial Flow Fans III,' Journal of Sound and Vibration, Vol. 56, No. 2, pp. 261-277 crossref(new window)

11.
Abbott, I.H., 1959, 'Theory of Wing Sections,' Dover Publications, Inc.

12.
Cho, J. and Williams, M. H., 1990, 'Counter-Rotating Propeller Analysis using a Frequency Domain Panel Method,' Journal of Propulsion and Power, Vol. 6, No. 4, pp. 426-434

13.
Kameier, F., and Neise, W., 1997, 'Experimental Study of Tip Clearance Losses and Noise in Axial Turbomachines and Their Reduction,' Journal of Turbomachinery, Vol. 119,No. 3, pp. 460-471

14.
Bleier, F. P., 1997, 'Fan Handbook - Selection Application, and Design,' Mc Graw-Hill

15.
Wallis, R. A., 1983, Axial Flow Fans and Ducts John Wiley & Sons