International Journal of Aeronautical and Space Sciences

  • 제10권1호
  • /
  • Pages.20-29
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  • 2009
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  • 2093-274X(pISSN)
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  • 2093-2480(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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Investigation of the Downwash Induced by Rotary Wings in Ground Effect

  • 발행 : 2009.05.30
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초록

There are concerns about the influence of the gust wind caused by helicopters affecting the moving vehicles while hovering over the road during rescue activities. For the understanding of such complicated flow. numerical simulation of a rotor hovering above the ground has been carried out, changing the rotor/ground clearances. The rotor thrust is kept constant. and the rotor control is determined by trim adjustments incorporated into the CFD algorithm. Collective pitch angle and the required power decreases with the rotor/ground clearance which agrees with experience. Changes of the flowfield near the rotor with regard to the rotor height are investigated based on the calculated results.

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참고문헌

  1. Tanabe, Y., Saito, S., Ooyama, N. and Hiraoka, K., Study of a Downwash Caused by a Hovering Rot or in Ground Effect, 34th European Rotorcraft Forum, Liverpool, UK, September 16-18, 2008.
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피인용 문헌

  1. Ground/Wall Effects on a Tilting Ducted Fan vol.3, pp.3, 2011, https://doi.org/10.1260/1756-8293.3.3.119
  2. Numerical Simulations and Measurements of the Helicopter Wake in Ground Effect vol.54, pp.1, 2017, https://doi.org/10.2514/1.C033665