Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Analysis of Axisymmetric Supercavitating Underwater Vehicle with the Variation of Shape Parameters

축대칭 수중 운동체의 형상 변화를 고려한 초월공동 수치해석

  • Park, Hyun-Ji (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Kim, Ji-Hye (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Ahn, Byoung-Kwon (Department of Naval Architecture & Ocean Engineering, Chungnam National University)
  • 박현지 (충남대학교 선박해양공학과) ;
  • 김지혜 (충남대학교 선박해양공학과) ;
  • 안병권 (충남대학교 선박해양공학과)
  • Received : 2018.03.29
  • Accepted : 2018.08.31
  • Published : 2018.12.20
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Abstract

Most of the numerical and experimental studies on supercavitating flows are focused on the cavitator only. However, the partial cavity growing into the supercavity is affected by the shape of the body placed behind the cavitator. In this paper, we develope a numerical method which is based on the boundary element method to predict supercavitating flow around three-dimensional axisymmetric bodies. We estimate the influence of the body shape on the supercavity growth. Here, we consider various parameters of the body such as cavitator shape, shoulder length and body diameter, and compare the results with the case of the cavitator only. In summary, it is found that the body may impede the cavity growth, the shoulder mainly affects the cavity length, and the supercavity occurring in the cone type cavitator is strongly influenced rather than that of the disk type cavitator.

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References

  1. Ahn, B.K., Lee, C.S. & Kim, H.T., 2010. Experimental and numerical studies on super-cavitating flow of axisymmetric cavitators. International Journal of the Society of Naval Architects and Ocean Engineering, 2(1), pp.39-44. https://doi.org/10.2478/IJNAOE-2013-0018
  2. Garabedian, P. R., 1956. Calculation of axially symmetric cavities and jets. Pacific Journal of Mathematics, 6(4), pp.611-684. https://doi.org/10.2140/pjm.1956.6.611
  3. Jeong, S.W. & Ahn, B.K., 2016. Numerical analysis of cavitating flow around two-dimensional wedge-shaped submerged bodies under the wall effect. Journal of the Society of Naval Architects of Korea, 54(4), pp.321-328. https://doi.org/10.3744/SNAK.2017.54.4.321
  4. Kim, J.H. & Ahn, B.K., 2018. Numerical analysis of supercavitating flow around axisymmetric underwater objects using a viscous-potential method. Journal of Marine Science and Technology, 23(2), pp.364-377. https://doi.org/10.1007/s00773-017-0479-1
  5. Kim, J.H., Jang, H.G., Ahn, B.K. & Lee, C.S., 2013. A numerical analysis of the supercavitating flow around three-dimensional axisymmetric cavitators. Journal of the Society of Naval Architects of Korea, 50(3), pp.160-166. https://doi.org/10.3744/SNAK.2013.50.3.160
  6. Kim, J.H., Jeong, S.W., Ahn, B.K & Jeon, Y.H., 2016. A study on natural supercavitation and drag characteristics of axisymmetric cavitators. Journal of the Society of Naval Architects of Korea, 53(6), pp.465-472. https://doi.org/10.3744/SNAK.2016.53.6.465
  7. Park, H.J., Kim, J.H. & Ahn, B.K., 2018. Numerical analysis of supercavitation according to shape change of the two-dimensional submerged body, Journal of the Society of Naval Architects of Korea, 55(1), pp.1-8. https://doi.org/10.3744/SNAK.2018.55.1.1
  8. Rouse, H. & McNown, J.S., 1948. Cavitation and pressure distribution: head forms at zero angle of yaw. Studies in Engineering, Bulletin 32, State University of Iowa, No. 420.
  9. Tulin, M., 1953. Steady two-dimensional cavity flows about slender bodies. David Taylor Model Basin Report No 834.
  10. Varghese, A.N., Uhlman, J.S. & Kirschner, I.N., 2005. Numerical analysis of high-speed bodies in partially cavitating axisymmetric flow. Journal of Fluids Engineering, 127(1), pp.41-54. https://doi.org/10.1115/1.1852473
  11. Waid, R.L. & Lindberg, Z., 1957. Experimental and theoretical investigations of a supercavitating hydrofoil. California Institute of Technology Report No 47-8.
  12. Wu, T., 1956. A free streamline theory for two-dimensional fully cavitated hydrofoils. Journal of Mathematics and Physics, 35, pp.403-442.