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충격파 풍동에서의 자유 낙하 장치를 활용한 힘 측정

Free-fall Force Measurement in a Shock Tunnel

  • Park, Jinwoo (Korea Advanced Institute of Science and Technology) ;
  • Chang, Won Keun (Korea Advanced Institute of Science and Technology) ;
  • Park, Gisu (Korea Advanced Institute of Science and Technology)
  • 투고 : 2015.07.22
  • 심사 : 2016.04.30
  • 발행 : 2016.06.01

초록

본 연구에서는 충격파 풍동을 이용하여 초음속 환경에서 사람 모델이 받는 압력과 가속도를 측정하였다. 전자석과 철가루가 내포되어 있는 3차원 사람 모델을 이용하여 모델 지지대로 인한 유동 흐름의 방해가 없는 자유 낙하 기법을 사용하였다. 마하 4 유동조건에 서 자유 낙하 실험을 수행하였으며, 실험을 통해 획득한 유동 가시화 이미지로 시간에 따른 사람 모델의 위치 변화를 파악하고 이를 통해 모델에 가해진 힘을 측정하였다.

In this paper, acceleration and pressure exerted on a human model were measured under a supersonic condition in a shock tunnel. In order to measure these in an interference-free environment, free-fall technique with an electromagnet and a three-dimensional iron-powdered human model was used. Free-fall experiment was conducted at Mach 4 and the force acting on the model was obtained by calculating the displacement from the flow visualization images.

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참고문헌

  1. TU Delft. (2016). DSE-Advanced Wingsuit. [online] Available at: http://www.tudelft.nl/studeren/bacheloropleidingen/overzicht-opleidingen/luchtvaart-en-ruimtevaarttechniek/studieprogramma/derde-jaar/design-synthesis-exercise/design-synthesis-exercise-20132014/dse-advanced-wingsuit/, [Accessed 27 Jun, 2015].
  2. "Skydiver Fell Faster Than Thought, Top Speed Verified at 844 mph _ or Mach 1.25," Washington Post, Retrieved on 4 Feb, 2013.
  3. Tuttle, S. L., and Simmons, J. M., "Hypersonic Drag Measurement in Free Piston Shock Tunnels," 11th Australasian Fluid Mechanics Conference, 1992.
  4. Dayman, B., Jr., "Support Interference Effects on the Supersonic Wake," Jet Propulsion Lab., Pasadena, Calif. (May 1963)
  5. Neely, A. J., West, I., Hruschka, R. Mudford, N. R., Park, G., "Determining aerodynamic coefficients from high speed video of a free-flying model in a shock tunnel,"
  6. Hideyuki, T., Tomoyuki, K., Laurence, S., Hannemann, K., "Free-flight force measurement technique in shock tunnel," 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012.
  7. Park, G., Park, C., Jin, Y., Choi, H., Byun, J., and Hwang, K., "Ethylene Transverse Jets in Supersonic Crossfows," Journal of Propulsion and Power, Vol. 31, No. 3, 2015, pp. 773-788. https://doi.org/10.2514/1.B35323