A Study on the Flow Characteristics of Rectangular Prism with Center Gap Through-flow at Different Aspect Ratio

중앙틈새를 관통하는 흐름을 갖는 사각형상 물체의 변장비에 따른 유동특성에 관한 연구

  • 김진구 (충북도립대학 기계자동차과) ;
  • 조대환 (목포해양대학교 기관시스템공학부) ;
  • 한상국 (목포해양대학교 기관시스템공학부)
  • Received : 2011.08.16
  • Accepted : 2011.09.14
  • Published : 2011.09.30

Abstract

Flow control of flow field is essential to design efficient elements relating to fluid machineries. In this study, flow characteristics of rectangular prism with center gap through-flow at different aspect ratio was investigated to flow control. It was used a FLUENT 6.3 version to study flow field. It was found that the through-flow disturbs the development of vertical velocity component and decreased the vortex size and critical value of a rapid change in pressure coefficient distribution.

Keywords

References

  1. S. Mahmud, A.K.M. Sadrul, M.A.H. Mamun, "Separation characteristics of fluid flow inside two parallel plates with wavy surface", J. Engineering Science, Vol.40, pp.1495-1509, 2002 https://doi.org/10.1016/S0020-7225(02)00029-0
  2. Okajima, A., "Strouhal number of rectangular cylinder", J. Fluid Mechanics, Vol.123, pp. 379-398, 1982 https://doi.org/10.1017/S0022112082003115
  3. Okajima, A., "Numerical simulation of flow around rectangular cylinders", J. Wind Engineering and Industrial Aerodynamics, Vol. 33, pp. 171-180, 1990 https://doi.org/10.1016/0167-6105(90)90033-9
  4. Norberg, C., "Flow around rectangular cylinders : Pressure forces and wake frequencies", J. Wind Engineering and Industrial Aerodynamics, Vol. 49, pp. 187-196, 1993 https://doi.org/10.1016/0167-6105(93)90014-F
  5. 김경천, 지호성, 성승학, "직사각형 프리즘 상면에서 발생되는 원추형 와의 유동구조", 대한기계학회 논문집B, 제25권 제5호, pp.713-721, 2001
  6. 지호성, 김경천, 추재민, 이석호, 성승학, 두꺼운 난류경계층 내부에 놓인 직사각형 프리즘 주위의 유동구조, 대한기계학회 논문집B, 제26권 제4호, pp. 578-586, 2002.
  7. Uhlmann, M., "An immersed boundary method with direct forcing for the simulation of particulate flows", J. Computational Physics, Vol. 209, pp. 448-476, 2005 https://doi.org/10.1016/j.jcp.2005.03.017
  8. Choi, H. C. and Moin, P., "Effect of the computational time step on numerical solutions of turbulent flow", J. Computational Physics, Vol. 113, pp.1-4, 1994 https://doi.org/10.1006/jcph.1994.1112
  9. Roma, A. M., Peskin, C. S., and Berger, M. J., "An adaptive version of the immersed boundary method, J. Computational Physics, Vol. 153, pp. 509-534, 1999 https://doi.org/10.1006/jcph.1999.6293
  10. 노기덕, 김광석, "모서리에 펜스를 가진 정방형주의 유체력 저감 특성", 한국마린엔지니어링학회지, Vol.30 No.3, pp.389-395, 2006
  11. Cheng, M., Whyte, D. S., and Lou, J., 2007, Numerical simulation of flow around a square cylinder in uniform-shear flow, Journal of Fluid and Structures, Vol. 23, pp. 207-226, 1999
  12. S. Murakami, A. Mochida and Y. Hayashi, "Examining the k-e model by means of wind tunnel test and large-eddy simulation of the turbulence structure around a cube", J. Wind Eng. Ind. Aerodyn. Vol.35, pp.87-100, 1990 https://doi.org/10.1016/0167-6105(90)90211-T
  13. D.F.G. Durao, M.V. Heitor and J.C.F. Pereira, "Measurements of turbulent and periodic flows around a square cross-section cylinder", Exp. Fluids, 298-304, 1988
  14. 이철재, 조대환, "모서리형상에 따른 수직벽 후류특성에 관한 연구", 한국기계기술학회 논문집, 제13권 제2호, pp.101-106, 2011