DOI QR코드

DOI QR Code

선박의 저항성능 추정을 위한 EARSM 난류 모형의 활용

Numerical Prediction of Ship Hydrodynamic Performances using Explicit Algebraic Reynolds Stress Turbulence Model

  • 김유철 (한국해양과학기술원, 선박해양플랜트연구소) ;
  • 김광수 (한국해양과학기술원, 선박해양플랜트연구소) ;
  • 김진 (한국해양과학기술원, 선박해양플랜트연구소)
  • Kim, Yoo-Chul (Korea Research Institute of Ships and Ocean Engineering (KRISO), Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Kim, Kwang-Soo (Korea Research Institute of Ships and Ocean Engineering (KRISO), Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Kim, Jin (Korea Research Institute of Ships and Ocean Engineering (KRISO), Korea Institute of Ocean Science & Technology (KIOST))
  • 투고 : 2013.11.07
  • 심사 : 2014.01.08
  • 발행 : 2014.02.20

초록

In this study, Explicit Algebraic Reynolds Stress Model (EARSM) which is based on the existing ${\kappa}-{\omega}$ model has been applied to the flow field analysis around ship hulls. Existing transport equations for the turbulent kinetic energy and the dissipation rate are used in almost the same form and anisotropy terms of Reynolds stresses are newly considered. The well-known KVLCC2 and KCS hull forms are selected as validation cases, which were also used in 2010 Workshop on CFD in Ship Hydrodynamics. In case of KVLCC2 double model, comparison of mean velocity distribution, turbulent kinetic energy, and Reynolds stresses near the propeller plane has been carried out and wave elevation and wave profiles have been additionally studied for KCS and KVLCC2 with free surface models. Some improved results for mean velocity distribution at the propeller plane have been obtained while there is little change in free surface wave profiles.

키워드

참고문헌

  1. Deng, G.B. and Visonneau, M., 1999. Comparison of explicit algebraic stress models and second-order turbulence closures for steady flows around ships. MARNET-CFD First Workshop, Barcelona, 18-19 November 1999.
  2. Gatski, T.B. & Speziale, C.G., 1993. On Explicit Algebraic Stress Models for Complex Turbulent Curved Flows. Journal of Fluid Mechanics, 254, pp.59-78. https://doi.org/10.1017/S0022112093002034
  3. Girimaji, S.S., 1996. Fully-Explicit and Self-Consistent Algebraic Reynolds Stress Model. Theoretical and Computational Fluid Dynamics, 8, pp.387-402. https://doi.org/10.1007/BF00455991
  4. Girimaji, S.S., 1997. A Galilean Invariant Explicit Algebraic Reynolds Stress Model for Turbulent Curved Flows. Physics of Fluids, 9, pp.1067-1077. https://doi.org/10.1063/1.869200
  5. Gothenburg, 2010. A workshop on numerical ship hydrodynamics, 2010. Proceedings, Volume II, Chalmers university of technology, Gothenburg, 8-10 December 2010.
  6. Johansson, A.V. & Wallin, S., 1996. A new explicit algebraic Reynolds stress model. Proceeding Sixth European Turbulence Conference, Lausanne, 2-5 July 1996, pp.31-34.
  7. Kim, J. Park, I.R. Kim, K.S. Van, S.H. & Kim, Y.C. 2011. Development of a Numerical Method for the Evaluation of Ship Resistance and Self-Propulsion Performances. Journal of the Society of Naval Architects of Korea, 48(2), pp.147-157. https://doi.org/10.3744/SNAK.2011.48.2.147
  8. Pope, S.B., 1975. A More General Effective-Viscosity Hypothesis. Journal of Fluid Mechanics, 72, pp.331-340. https://doi.org/10.1017/S0022112075003382
  9. Rotta, J.C. 1951. Statistische Theorie Nichthomogener Turbulenz. Zeitschrift fur Physik, 129, pp.547-572. https://doi.org/10.1007/BF01330059
  10. Sjogren, T. 1997. Development and validation of turbulence models through experiment and computation, Ph.D. Stockholm: Dept. of Mechanics, KTH.
  11. Taulbee, D.B., 1992. An Improved Algebraic Reynolds Stress Model and Corresponding Nonlinear Stress Model. Physics of Fluids A, 4, pp.2555-2561. https://doi.org/10.1063/1.858442
  12. Wallin, S., 1999. An Efficient Explicit Algebraic Reynolds Stress k-${\epsilon}$ Model (EARSM) for Aeronautical Applications, FFA TN 1999-71.
  13. Wallin, S. & Johansson, A.V., 2000. An Explicit Algebraic Reynolds Stress Model for Incompressible and Compressible Flows. Journal of Fluid Mechanics, 403, pp.89-132. https://doi.org/10.1017/S0022112099007004
  14. Yang, H., Kim, B.N., Yoo, J. & Kim, W.J. 2010. Wake Comparison between Models and Full Scale Ships using CFD. Journal of the Society of Naval Architects of Korea, 47(2), pp.150-162. https://doi.org/10.3744/SNAK.2010.47.2.150