Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Numerical Simulation of Longitudinal Vortex in Turbulent Boundary Layers

3차원 난류경계층 내에 존재하는 종방향 와동의 유동특성에 관한 수치적 연구

  • 양장식 (부산대학교 기계공학부, 기계기술연구소) ;
  • 이기백 (부산대학교 기계공학부, 기계기술연구소)
  • Published : 2000.06.01
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Abstract

This paper represents numerical computations of the interaction between the longitudinal vortex and a flat plate 3-D turbulent boundary layer. In the present study, the main interest is in the behavior of longitudinal vortices introduced in turbulent boundary layers. The flow field behind vortex generator is modeled by the information that is available from studies on the delta winglet. Also, the Reynolds-averaged Navier-Stoke equations for three-dimensional turbulent flows, together with a two-layer turbulence model to resolve the near-wall flow, is solved by the method of pseudo compressibility. The present results show that the boundary layer is thinned in the regions where the secondary flow is directed toward the wall and thickened where it is directed away from the wall, and have a good agreement with the experimental data.

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References

  1. Pauley, W. R. and Eaton, J. K., 1988, 'The Fluid Dynamics and Heat Transfer Effects of Streamwise Vortices Embedded in a Turbulent Boundary Layer,' Report MD-51, Department of Mechanical Engineering, Stanford University
  2. Shabaka, I. M. M. A. and Mehta, R. S. , 1985, 'Longitudinal Vortices Imbedded in Turbulent Boundary Layers. Part 1. Single Vortex,' Journal of Fluid Mechanics, Vol. 155, pp. 37-57 https://doi.org/10.1017/S0022112085001707
  3. Liu, J., Piomelli, U., and Philippe, R. S., 1996, 'Interaction between a Spatially growing Turbulent Boundary Layer and Embedded Streamwise Vortices,' Journal of Fluid Mechanics, Vol. 326, pp. 151-179 https://doi.org/10.1017/S0022112096008270
  4. Kim, W. J. and Patel, V. C., 1994, 'Influence of Streamwise Curvature on Longitudinal Vortices Imbedded in Turbulent Boundary Layers,' Journal of Computers Fluid, Vol. 23, No.5, pp. 647-673 https://doi.org/10.1016/0045-7930(94)90008-6
  5. Kim, J. Q., Ryou, H. S., Jeong, J. Y., and Dedousis, V., 1996, 'Numerical Simulation of 3-D turbulent Flows with Imbedded Longitudinal Vortex,' Computation Fluid Dynamics, Vol. 4, No.4, pp. 473~488
  6. Kwak, D., Chang, J . L. C., Shanks. S. P., and Chakravarthy, S., 1986, 'A Three-Dimensional Incompressible Navier-Stokes Flow Solver Using Primitive Variables,' AIAA Journal, Vol. 24, No. 3, pp. 390 - 396
  7. Chen, H. C. and Patel, V. C., 1987, 'Practical near Wall Turbulence Model for Complex Flow Including Separation,' AIAA Paper 87-1300
  8. Lowson, M. V., 1989, 'Visualization Measurements of Vortex Flows,' AIAA paper-89-0191
  9. Leutcher, O. and Solignac, J.L., 1983, 'Experimental Investigation of the Turbulence Structure of Vortex Wakes,' Proceeding 4th Symposium on Turbulent Shear Flows, Germany
  10. Phillips, W .R.C. and Graham, J. A. H., 1984, 'Reynolds Stress Measurements in a Turbulent Trailing Vortex,' Journal of Fluid Mechanics, Vol. 147, pp. 353-371 https://doi.org/10.1017/S0022112084002123
  11. Johnston, J. P., 1960, 'On The Three- ？Dimensional Turbulent Boundary Layer Generated by Secondary Flow,' Journal of Basic Engineering, pp. 233 -248
  12. 박원규,1997, 전산유체역학 강의노트 I,II,부산대학교