한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
권호 표지

이동 벽면에 의한 원형 실린더의 비대칭적 공력 발달에 관한 전산연구

A COMPUTATIONAL STUDY ABOUT THE ASYMMETRIC AERODYNAMIC EVOLUTION AROUND A CIRCULAR CYLINDER CAUSED BY A MOVING WALL

  • 정재윤 (한국항공대학교 항공우주 및 기계공학과) ;
  • 장조원 (한국항공대학교 항공우주공학과)
  • 발행 : 2006.09.01
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초록

A Computational study was carried out in order to investigate the moving wall effect of a circular cylinder at a Reynolds number of $2.0{\times}10^4$. The viscous-incompressible Navier-Stokes equations and Spalart-Almaras turbulent model of the commercial CFD code were adopted for this numerical analysis. The moving wall was set parallel with the freestream, and moving speed was equal to the freestream velocity. The gap ratio is defined as the distance ratio between the circular cylinder diameter and the height from the moving wall. The results show that there is vortex shedding over the critical gap ratio and aerodynamic loads including amplitude and the Strouhal number change according to the gap ratio.

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참고문헌

  1. Ahmed, M.R., Sirogane, H. and Kohama, Y., 1999, "Boundary Layer Control with a Moving Belt System for Studies of Wing-in-Ground Effect," JSME International Journal, Vol.42, No.4, p.619-625 https://doi.org/10.1299/jsmeb.42.619
  2. Bhattacharyya S. and Maiti D.K., 2005, "Vortex Shedding from a Square Cylinder in Presence of a Moving Wall," International Journal for Numerical Methods in Fluids, Vol.48, p.985-1000 https://doi.org/10.1002/fld.970
  3. 임예훈, 2000, "Navier-Stokes 방정식을 이용한 지면효과 날개의 해석," 박사학위논문, 한국과학기술원
  4. 김태윤, 이보성, 이동호, T. Kohama, 2005, "지면 운동에 따른 정사각주 후류의 와류 운동장 수치해석(I) 고정 지면과 이동 지면 비교," 한국 항공우주학회지, 제33권 제6호, p. 1-8 https://doi.org/10.5139/JKSAS.2005.33.6.001
  5. Choi J.H., and Lee S.J., 2000, "Ground Effect of Flow Around an Elliptic Cylinder in a Turbulent Boundary Layer," Journal of Fluid and Structures, Vol.14, p.697-709 https://doi.org/10.1006/jfls.2000.0290
  6. Williamson, C.H.K., 1996, "Vortex Dynamics in the Cylinder Wake," Annual Review of Fluid Mechanics, Vol.28, p.477-539 https://doi.org/10.1146/annurev.fl.28.010196.002401
  7. Paul K. Chang, 1979, "Separation of Flow," Pergamon Press Inc., p.16, 355
  8. 정재윤, 장조원, 정윤식, 2006, "지면효과를 받는 2차원 원통 후류 연구," 한국항공운항학회 춘계학술대회 논문집, p.104-107
  9. Noberg, C., 2003, "Fluctuating Lift on a Circular Cylinder : Review and New Measurements," Journal of Fluids and Structures, Vol.17, p.57-96 https://doi.org/10.1016/S0889-9746(02)00099-3
  10. Persillon, H. & Braza, M., 1998, "Physical Analysis of the Transition to Turbulence in the Wake of a Circular Cylinder by Three-Dimensional Navier-Stokes Simulation," Journal of Fluid Mechanics, Vol.365, p.23-88 https://doi.org/10.1017/S0022112098001116