Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
권호 표지
DOI QR코드

DOI QR Code

AN INVESTIGATION ON HVLS FAN PERFORMANCE WITH DIFFERENT BLADE CONFIGURATIONS

날개 형상에 따른 HVLS의 성능에 관한 연구

  • Moshfeghi, Mohammad (Multi-Phenomena CFD Engineering Research Center, Sogang University) ;
  • Hur, Nahmkeon (Multi-Phenomena CFD Engineering Research Center, Sogang University) ;
  • Kim, Young Joo (Green Transport & Logistic Institute, Korea Railroad Research Institute) ;
  • Kang, Hyun Wook (Technical Research Lab, Building and Tunnel Technologies Inc.)
  • ;
  • 허남건 (서강대학교 다중현상 CFD 연구센터) ;
  • 김영주 (한국철도기술연구원 녹색교통물류시스템공학연구소) ;
  • 강현욱 ((주)비엔텍아이엔씨 기술연구소 연구개발팀)
  • Received : 2014.12.02
  • Accepted : 2014.12.22
  • Published : 2014.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

High-volume low-speed (HVLS) fans are one category of ceiling fan installed in large enclosings such as warehouses, large barns and health clubs in order to generate comfortable air circulation. As a rotary blade, aerodynamic performance of a HVLS fan is predominantly related to its airfoil(s), and the pitch and twist angles. This paper first, investigates the effects of airfoil on the performances of three different HVLS fans with NACA 5414, 6413 and 7415 airfoils. The fans have six untwisted blades with the diameter of 6 m and rotate at 60 RPM. The blades pitch angels are $12^{\circ}$, $12^{\circ}$ and $13^{\circ}$, respectively. The results are presented in the form of the aerodynamic forces and moments, volumetric flow rate and streamlines. Regarding the volumetric flow of air, the results show that the model with NACA 7415 has the best performance. Hence, two other HVLS fans with the same airfoil but, with four and five blades are studied in order to investigate the effects of number of blades. From the point of view of air circulation still the six-bladed fan is the best one; however, the five-bladed fan is more efficient in power consumption.

Keywords

References

  1. http://en.wikipedia.org/wiki/high-volume_low-speed_fan.
  2. http://continuingeducation.construction.com/article.php?L=193&C=635&P=8.
  3. 2001, Dougan, D. and Damiano, L.A., "ASHRAE. Standard 62. Comprehensive summary," (http://www.automatedbuildings.com/news/jan03/articles/ebtron/ebt.htm).
  4. 2004, Momoi, Y., Sagara, K., Yamanaka, J. and Kotani, H., "Modeling of ceiling fan based on velocity measurement for CFD simulation of airflow in large room," In: Proceedings of the 9th International Conference on Air Distribution in Rooms, Coimbra, Portugal, pp.145-150.
  5. 2010, Forrest, J. and Owen, I., "MegaFan Warehouse Case Study:Final Report".
  6. 2003, Kammel, D.W., Raabe, M.E. and Kappelman, J.J., "Design of high volume low speed fan supplemental cooling system in dairy free stall barns," Proc., 5th Dairy Housing Conf. Publ 701P0203, pp.243-254.
  7. 2003, Aynsley, R. and Ali, M., "Optimizing Ceiling Fan Locations with CFD," Architectural Engineering 2003, pp.1-4.
  8. 2012, Moshfeghi, M., Song, Y.J. and Xie, Y.H., "Effects of near-wall grid spacing on $SST-k-{\omega}$ model using NREL Phase VI horizontal axis wind turbine," J. of Wind Eng. and Ind. Aerodyn, Vol.107, pp.94-105.
  9. 2011, Bassiouny, R. and Koran, N.S., "Studying the features of air flow induced by a room ceiling-fan," J. of Energy and Buildings, Vol.43(8), pp.1913-1918. https://doi.org/10.1016/j.enbuild.2011.03.034
  10. 1997, Bardina, J.E., Huang, P.G. and Coakley, T.J., "Turbulence Modeling Validation, Testing, and Development," NASA Technical Memorandum 110446.
  11. 1995, Shih, T.H., Liou, W.W., Shabbir, Z. and Zhu, J., A $New-k-{\omega}$ Eddy-Viscosity Model for High Reynolds Number Turbulent Flows-Model Development and Validation Computers Fluids, 24(3), pp.227-238. https://doi.org/10.1016/0045-7930(94)00032-T
  12. 2013, "STAR-CCM Ver. 8.04 help manual".
  13. 1985, Rohles, F., "The development of a protocol for measuring the air velocities from the industrial ceiling fan," Institute for Environmental Research Report No.85-1, Kansas State University.