The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
권호 표지
DOI QR코드

DOI QR Code

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

허브 캡 형상에 따른 축류송풍기 성능특성

  • 장춘만 (한국건설과학기술원 화재설비연구부) ;
  • 최승만 ((주) 케피코 시스템응용팀) ;
  • 김광용 (인하대학교 기계공학부)
  • Published : 2006.12.01
Download PDF
⟨ Previous Next ⟩

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

References

  1. Roberts, D. A. and Kacker, S. C., 2002, 'Numerical Investigation of Tandem-impeller Designs for a Gas Turbine Compressor,' ASME J. Turbo-machine., Vol. 124, pp. 36-44 https://doi.org/10.1115/1.1413472
  2. Downie, R. J., Thompson, M. C. and Wallis, R. A., 1993, 'An Engineering Approach to Blade Design for Low to Medium Pressure Rise Rotor-Only Axial Fans,' Experimental Thermal and Fluid Science, Vol. 6, pp. 376-410 https://doi.org/10.1016/0894-1777(93)90016-C
  3. Jang, C.-M., Kim, K. Y. and Fukano, T., 2004, 'Frequency Characteristics of Fluctuating Velocity According to Flow Rates in a Tip Leakage Vortex and a Wake Flow in an Axial Flow Fan,' Trans. of the KSME(B), Vol. 28, No. 2, pp. 181-188
  4. Charalambous, N., Ghisu, T., Lurisci, G., Pachidis, V. and Pilidis, P., 2004, 'Axial Compressor Response to Inlet Flow Distortions by a CFD Analysis,' ASME Turbo Expo, GT2004-53846
  5. Lee, S. B., Kim, K. Y., Kim, J. Y. and Yang, G. C., 1998, 'A Study on the Effects of Non-Uniform Inlet Flows upon Performance and Tonal Radiation from a Propeller Fan,' ASME Fluid Engineering Division Summer Meeting, FEDSM98-3445
  6. Hah, C., Rabe, D., Sullivan, T. and Wadia, A., 1998, 'Effects of Inlet Distortion on the Flow Fields in a Transonic Compressor Rotor,' ASME J. Turbo-machine., Vol. 120, No. 4, pp. 233-246 https://doi.org/10.1115/1.2841398
  7. CFX-5.7 User Manual

Cited by

  1. Effects of the Distance between Jet Fans on the Ventilation Performance in a Road Tunnel vol.14, pp.4, 2011, https://doi.org/10.5293/KFMA.2011.14.4.025