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플래핑 운동 및 키놀이 운동을 하는 얇은 에어포일의 공력특성에 대한 수치 해석

Numerical Analysis on the Aerodynamic Characteristics of Thin Airfoil with Flapping and Pitching Motion

  • 투고 : 2013.02.21
  • 심사 : 2013.03.22
  • 발행 : 2013.03.31

초록

In this study, lumped-vortex element method and thin airfoil theory were used to analyze aerodynamic characteristics of airfoils with relative motion that had camber lines of NACA $44{\times}{\times}$ airfoil in 2-dimensional unsteady incompressible potential flow. Velocity disturbance due to airfoil was calculated by lumped-vortex element model and force distribution on airfoil by unsteady Bernoulli's equation. Variables in relative motion were considered the period p, the amplitude of flapping $A_f$ and pitching $A_p$, and the phase difference between flapping and pitching ${\phi}_p$ and the angle of attack ${\alpha}$. Due to movement of an airfoil, dag was induced in 2-dimensional unsteady incompressible potential flow. The numerical results show that the aerodynamic characteristics of the airfoil with flapping and pitching at the same time are illustrated. Especially the mean lift coefficient became smaller, but drag coefficient became larger.

키워드

참고문헌

  1. Jones, K. D. and Platzer, M. F., "Numerical Computation of Flapping-Wing Propulsion and Power Extraction", Aeronautical Engineer's Thesis, Naval Postgraduate School, Monterey, CA, 1990
  2. Garrick, I. E., "Propulsive of a Flapping and Oscillating Airfoil", NACA Report 567, 1936
  3. Jones, K. D., Dohring, C. M. and Platzer, M. F., "Wake Structure behind Plunging Airfoil : a Comparison of Numerical and Experimental Results", Aeronautical Engineer's Thesis, Naval Postgraduate School, Monterey, CA, 1989
  4. Jones, K. D. and Platzer, M. F., "Time-Domain Analysis of Low-Speed Airfoil Flutter", AIAA J., Vol. 34, No. 5, May 1996
  5. Schimidt, W., "Der Wellpropeller, ein neuer Antrieb fuer Wasser-. Land-, und Luftfarzuege", Zeitchrift fur Flugwiss, Vol. 13., Dec. 1965
  6. Tuncer, H. I. and Platzer, M. F., "Thrust generation due to Airfoil Flapping", AIAA J., Vol. 34, No. 2, Febuary, 1996
  7. 일본 기계 학회 편, 신병록, 장근식, 조강래 공역, "전산유체역학", 대영사, 1997
  8. Katz and Plotkin, "Low-speed Aerodynamics from Wing Theory to Panel Method", Mcgraw-hill Book Co., 1991
  9. Krishmanurty Karamcheti, "Principle of Ideal-Fluid Aerodynamics", John Wiley and Sons, Inc., 1996