The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Numerical Analysis of Aerodynamic Characteristics and Performance Analysis on H-rotor with Various Solidities

솔리디티에 따른 H-로터의 공기역학적 특성 및 성능해석

  • Joo, Sungjun (Electric engineering, Hoseo university) ;
  • Lee, Juhee (Department of ICT automotive engineering, Hoseo university)
  • 주성준 (호서대학교, 전자공학전공) ;
  • 이주희 (호서대학교, 자동차ICT공학과)
  • Received : 2013.07.08
  • Accepted : 2016.07.11
  • Published : 2016.12.01
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Abstract

Three-dimensional unsteady numerical analysis has been performed to observe aerodynamic characteristics of a H-rotor. Generally, the structure of the H-rotor is simple but the aerodynamic characteristics are exceptionably complicated since the angle of attacks and incident velocities to a blade are considerably varied according to the azimuth angles and solidities. The blade in the upwind revolution between 0 to 180 degree obtains aerodynamic energy from the free stream but the blade in the downwind revolution between 180 to 360 degree does not. When the rotating speed increases, the blade in the downwind revolution accelerates the air around the blade like a fan and it consumes the energy and shows negative torque in the area. On the other hand, the direction of the free stream is bent because of the interaction between blade the free stream. Therefore, the operation point (highest power coefficient) appears at a lower tip-speed-ratio what it is expected.

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References

  1. Savonius, S. J., 1931, "The S-Rotor and Its Applications," Mech. Eng., Vol. 53, No. 5 pp. 333-338.
  2. Darrieus, G. J. M., 1931, "Turbine Having Its Rotating Shaft Transverse to the Flow of the Current," US Patent No.1835081.
  3. Blackwell, B. F., 1974, "The Vertical Axis Wind Turbine How It Works," SANDIA, SLA-74-0160.
  4. Blackwell, B. F., Sheldahl R. E., and Feltz, L. V., 1976, "Wind Tunnel Performance Data for the Darrieus Wind Turbine with NACA0012 Blades," SANDIA, SAND76-0130.
  5. Carne, T. G., 1980, "Guy Cable Design and Damping for Vertical Axis Wind Turbines," SANDIA, SAND80-2669.
  6. Oler, J. W., Strickland, J. H., Im, B. J., and Graham, G. H., 1983, "Dynamic Stall Regulation of the Darrieus Turbine," SANDIA, SAND83-7029.
  7. Sheldahl, R. E., Klimas, P. C., and Feltz, L. V., 1980, "Aerodynamic Performance of a 5-meterr Diameter Darrieus Turbine with Extruded Aluminum NACA-0015 blades," SANDIA, SAND80-0179.
  8. Reuter, R. C. Jr, 1977, "Vertical Axis Wind Turbine Tie-down Design with an Example," SANDIA, SAND77-1919.
  9. Klimas, P. C. and Sheldahl, R. E., 1978, "Four Aerodynamic Prediction Schemes for Vertical-Axis wind Turbines: a Compendium," SANDIA, SAND78-0014.
  10. Ashwill, T. D. and Loenard, T. M., 1986, "Developments in Blade Shaped Design for a Darrieus Vertical Axis Wind Turbine," SANDIA, DAND86-1085
  11. Klimas, P. C., 1984, "Tailored Airfoils for Vertical Axis Wind Turbines," SANDIA, SAND84-1062
  12. Scheldahl, R. E. and Klimas, P. C., 1980, "Aerodynamic Characteristics of Seven Symmetrical Airfoil Sections Through 180-Degree Angle of Attack for use in Aerodynamic Analysis of Vertical Axis Wind Turbine," SANDIA, SAND80-2114.
  13. Popelka, D., 1982, "Aeroelastic Stability Analysis of a Darrieus Wind Turbine," SANDIA, SAND82-0672.
  14. Reuter, R. C., Jr. and Worstell, M. H., 1978, "Torque Ripple in a Veritcla Axis Wind Turbine," SANDIA, SAND78-0577.
  15. Carne, T. G., Lobitz, D. W., Nord, A. R., and Watson, R. A., 1982, "Finite Element Analysis and Modal Testing of a Rotating Wing Turbine," SANDIA, SAND82-0345.
  16. Islam, M., Ting, D. S. K., and Fartaj, A., 2008, "Aerodynamic Models for Darrieus-Type Straight-Blade Vertical Axis Wind Turbines," Renewable and Sustainable Energy Reviews, Vol. 12, No. 4, pp. 1087-1109. https://doi.org/10.1016/j.rser.2006.10.023
  17. Lee, J. H. and Yoo, Y. S., 2011, "Aerodynamic Characteristics of Giromill with High Solidity," Transactions of the Korean Society of Mechanical Engineers B, Vol. 35, No. 12. pp. 1273-1283. https://doi.org/10.3795/KSME-B.2011.35.12.1273
  18. Yoo, N. S., 1992, "A Study of the Performance Prediction of the Darrieus Wind Turbine," Transaction of JSAS, Vol. 20, No. 1, pp. 80-94.
  19. Mohamed, M. H., 2012, "Performance Investigation of H-rotor Darrieus Turbine with New Airfoil Shapes," Energy, Vol. 47, No. 1, pp. 522-530. https://doi.org/10.1016/j.energy.2012.08.044
  20. Castelli, M. R., Englaro, A., Ernesto, B., 2011, "The Darrieus Wind Turbine: Proposal for a New Performance Prediction Model Based on CFD," Energy, Vol. 36, No. 8, pp. 4919-4934. https://doi.org/10.1016/j.energy.2011.05.036
  21. Jeong, H. G., Lee, S. H., and Kwon, S. D., 2014, "Effect of Blockage Ratio on Wind Tunnel Testing of Small Vertical-axis Wind Turbines," Journal of the Korean Solar Energy Society, Vol. 34, No. 3. pp. 98-106. https://doi.org/10.7836/kses.2014.34.3.098
  22. Kang, D. H., Shin, W. S., and Lee, J. H., 2014, "Experimental Study on the Performance of Urban Small Vertical Wind Turbine with Different Types," The KSFM Journal of Fluid Machinery, Vol. 17, No. 6, pp. 64-68. https://doi.org/10.5293/kfma.2014.17.6.064
  23. Jeong, J. H., Kang, K. W., Kim, B. S., and Lee, J. H., 2011, "Effect of Geometric Variation on Starting Characteristic Analysis of H-Darrieus Blades," The KSFM Journal of Fluid Machinery, Vol. 14, No. 3, pp. 45-49.
  24. STAR-CCM+, 2006, Methodology, CD-adapco.
  25. Howell, R., Qin, N., Edwards, J., and Durrani, N., 2010, "Wind Tunnel and Numerical Study of a Small Vertical Axis Wind Turbine," Renewable Energy, Vol. 35, No. 2, pp. 412-422. https://doi.org/10.1016/j.renene.2009.07.025
  26. Joo, S., Choi, H., and Lee, J., 2015, "Aerodynaic Characteristics of Two-bladed H-Darrieus at Various Solidities and Rotating Speeds," Energy, Vol. 90, pp. 439-451. https://doi.org/10.1016/j.energy.2015.07.051