Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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NUMERICAL ANALYSIS OF SUPER-CAVITATING FLOW AROUND TWO-DIMENSIONAL AND AXISYMMETRIC BODIES

2차원 및 축대칭 운동체 주위의 초공동 현상에 대한 수치해석

  • 박선호 (서울대학교 대학원 조선해양공학과) ;
  • 이신형 (서울대학교 조선해양공학과 해양시스템공학연구소)
  • Received : 2010.11.23
  • Accepted : 2011.01.21
  • Published : 2011.03.31
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Abstract

Super-cavitating flows around under-water bodies are being studied for drag reduction and dramatic speed increase. In this paper, high speed super-cavitating flow around a two-dimensional symmetric wedge-shaped body were studied using an unsteady Reynolds-averaged Navier-Stokes equations solver based on a cell-centered finite volume method. To verify the computational method, flow over a hemispherical head-form body was simulated and validated against existing experimental data. Various computational conditions, such as different wedge angles and caviation numbers, were considered for the super-cavitating flow around the wedge-shaped body. Super-cavity begins to form in the low pressure region and propagates along the wedge body. The computed cavity lengths and velocities on the cavity boundary with varying cavitation number were validated by comparing with analytic solution.

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References

  1. 1991, Kim, Y.G., Lee, C.S. and Lee, J.T., "A Potential-Based Panel Method for the Analysis of a Two-dimensional Super-Cavitating Hydrofoil," Journal of the Society of Naval Architects of Korea, Vol.8, No.2, pp.159-173.
  2. 1993, Kim, Y.G., Lee, C.S., Lee, J.T. and Suh, J.C., "Prediction of Steady Performance of a Propeller by Using a Potential-Based Panel Method," Journal of the Society of Naval Architects of Korea, Vol.30, No.1, pp.73-86.
  3. 2005, Varghese, A.N., Uhlman, J.S. and Kirschner, I.N, "Numerical Analysis of High-Speed Bodies in Partially Cavitating Axisymmetric Flow," Journal of Fluids Engineering, Vol.127, pp.41-54. https://doi.org/10.1115/1.1852473
  4. 2007, Ahn, B.K., Lee, C.S., Yu, Y.W. and Moon, I.S., "Prediction of the Propeller Face Cavity Inception and Experimental Verification," Journal of the Society of Naval Architects of Korea, Vol.44, No.5, pp.467-473. https://doi.org/10.3744/SNAK.2007.44.5.467
  5. 2010, Ahn, B.K., Lee, C.S. and Kim, H.T., "Experimental and Numerical Studies on Super-cavitating Flow of Axisymmetric Cavitators," International Journal of Naval Architecture and Ocean Engineering, Vol.2. pp.39-44.
  6. 2001, Serebryakov, V.V., "Some Models of Prediction of Supercavitating Flows Based on Slender Body Approximation," 4th International Symposium on Cavitation, Califonia, USA.
  7. 2001, Savchenko, Y.N, "Supercavitation-Problems and Perspectives," 4th International Symposium on Cavitation, Califonia, USA.
  8. 1969, Walllis, G., "One Dimensional Two-Phase Flow," Mcgraw-Hill, TX, ISBN-10: 0070679428.
  9. 1998, Merkle, C.L., Feng, J. and Buelow, P.E.O., "Computational Modeling of the Dynamics of Sheet Cavitation," 3rd International Symposium on Cavitation, Grenoble, France.
  10. 1999, Kunz, R.F., Stinebring, D.R., Chyczewski, T.S., Boger, D.A., and Gibeling, H.J., "Multi-Phase CFD Analysis of Natural and Ventilated Cavitation about Submerged Bodies," Proceeding of 3rd ASME/JSME Joints Fluid Engineering Conference-ASME Paper FEDSM 99-7364.
  11. 2001, Schnerr, G.H. and Sauer, J., "Physical and Numerical Modeling of Unsteady Cavitation Dynamics," 4th International Conference on Multiphase Flow, New Orleans, USA.
  12. 2010, Park, S.H. and Rhee, S.H., "Investigation for the Characteristics of Cavitation Modeling for Computational Fluid Dynamics," Journal of the Society of Naval Archtect of Korea, Vol.47, No.5, pp.657-669. https://doi.org/10.3744/SNAK.2010.47.5.657
  13. 1948, Rouse, H. and McNown, J.S., "Cavitation and Pressure Distribution in Engineering," Bulletin 32 (State University of Iowa).
  14. 1977, Newman, J.N., "Marine Hydrodynamics," The MIT Press, Cambridge, ISBN-10: 026214026.