상대운동이 있는 이차원 비정상 점성 유동 해석을 위한 비정렬 중첩격자기법 개발

DEVELOPMENT OF AN UNSTRUCTURED OVERSET MESH METHOD FOR 2-D UNSTEADY VISCOUS FLOW SIMULATION WITH RELATIVE MOTION

  • 정문승 (한국과학기술원 항공우주공학과 대학원) ;
  • 권오준 (한국과학기술원 항공우주공학과)
  • 발행 : 2006.06.01

초록

An unstructured overset mesh method has been developed for the simulation of unsteady viscous flow fields around multiple bodies in relative motion. For this purpose, a robust and fast search technique is proposed for both triangle and high-aspect ratio quadrilateral cell elements. The interpolation boundary is defined for data communication between grid systems and an interpolation method is suggested for viscous and inviscid cell elements. This method has been applied to calculate the flow fields around 2-D airfoils involving relative motion. Validations were made by comparing the predicted results with those of experiments or other numerical results. It was demonstrated that the present method is efficient and robust for the prediction of unsteady time-accurate flow fields involving multiple bodies in relative motion.

참고문헌

  1. 정문승, 권오준, 2005, "상대운동이 있는 물체주위의 비정상 유동해석을 위한 병렬화된 비정렬 중첩격자기법 개발," 한국항공우주학회지, Vol.33-2, p.1-10 https://doi.org/10.5139/JKSAS.2005.33.2.001
  2. Peroomian, O., Chakravarthy, S., and Goldberg, U.C., 1997, "A "Grid-Transparent" Methodology for CFD," AIAA 97-0724
  3. Nakahashi, K., Togashi, F., and Sharov, D., 2000, "Intergrid -Boundary Definition Method for Overset Unstructured Grid Approach," AIAA J., Vol.38-11, p.2077-2084
  4. Hughes, J.R. Thomas, 1987, "The Finite Element Method," Prentice-Hall International, Inc. New Jersey
  5. Landon, R.H., 1982, "NACA0012 Oscillatory and Transient Pitching, Compendium of Unsteady Aerodynamic Measurements," AGARD Rept.702
  6. Tuncer, I.H. and Platzer, M.F., 1996, "Thrust Generation due to Airfoil Flapping," AIAA J., Vol.34-2, p.324-331
  7. Van den Berg, B., 1979, "Boundary Layer Measurements on a Two-Dimensional Wing with Flap," NLR TR 79009U