International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Experimental and numerical studies on super-cavitating flow of axisymmetric cavitators

  • Ahn, Byoung-Kwon (Department of Naval Architecture and Ocean Engineering, College of Engineering, Chungnam National University) ;
  • Lee, Chang-Sup (Department of Naval Architecture and Ocean Engineering, College of Engineering, Chungnam National University) ;
  • Kim, Hyoung-Tae (Department of Naval Architecture and Ocean Engineering, College of Engineering, Chungnam National University)
  • Published : 2010.03.30
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Abstract

Recently underwater systems moving at high speed such as a super-cavitating torpedo have been studied for their practical advantage of the dramatic drag reduction. In this study we are focusing our attention on super-cavitating flows around axisymmetric cavitators. A numerical method based on inviscid flow is developed and the results for several shapes of the cavitator are presented. First using a potential based boundary element method, we find the shape of the cavtiator yielding a sufficiently large enough cavity to surround the body. Second, numerical predictions of supercavity are validated by comparing, with experimental observations carried out in a high speed cavitation tunnel at Chungnam National University (CNU CT).

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References

  1. Alyanak, E. Venkayya, V. Grandhi, R. and Penmetsa, R., 2004. Variable shape cavitator design for a supercavitating torpedo. Proc. of 10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Albany, NY, USA.
  2. Kirschner, I.N. Uhlman, J.S. Varhese, A.N. and Kuria, I.M., 1995. Supercavitating projectiles in axisymmetric subsonic liquid flows. American Society of Mechanical Engineers, Fluids Engineering Division, Vol. 210, pp. 75-93.
  3. Kreisel, G. 1946. Cavitation with Finite Cavitatin Number, Admitalty Res. Lab. Rept. No. R1H/36.
  4. Kunz, R.F. Boger, D.A. Chyczewski, T.S. Stinebring, D.R. Gibeling, H.J. and Govindan T.R., 1999. Multi-Phase CFD Analysis of natural and ventilated cavitation about submerged bodies. Proceedings of FEDSM 9, 3rd ASME/JSME Joint Fluids Engineering Conference,San Francisco, CA, USA.
  5. LEE, C.-S., 1989. A potential based panel method for the analysis of a 2-dimensinal cavitating hydrofoil, College of Egnineering, CNU, Daejon, Korea.
  6. Newman, J.N., 1977. Marine Hydrodynamics, The MIT Press, Cambridge, MA, USA.
  7. Uhlman, J.S., 1989, The surface singularity or boundary intergral method applied to supercavitating hydrofoils. J. of Ship Research, 33, pp. 16-20.
  8. Wu, T.Y., 1972. Cavity and wake flow. Annual Review of Fluid Mechanics. 4, pp. 243-284. https://doi.org/10.1146/annurev.fl.04.010172.001331
  9. Yang, C. and Jesup, S., 1988. Benchmark analysis of a series of propellers with a panel method. Proc. of SNAME propeller 1988 Symp., Virginia Beach, VA, USA, pp. 1-10.

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