International Journal of Naval Architecture and Ocean Engineering

  • 제2권1호
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  • Pages.1-13
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  • 2010
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  • 2092-6782(pISSN)
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  • 2092-6790(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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Comparative study on the performance of Pod type waterjet by experiment and computation

  • Kim, Moon-Chan (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Park, Warn-Gyu (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Chun, Ho-Hwan (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Jung, Un-Hwa (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 발행 : 2010.03.30
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초록

A comparative study between a computation and an experiment has been conducted to predict the performance of a Pod type waterjet for cm amphibious wheeled vehicle. The Pod type waterjet has been chosen on the basis of the required specific speed of more than 2500. As the Pod type waterjet is an extreme type of axial flow type waterjet, theoretical as well as experimental works about Pod type waterjets are very rare. The main purpose of the present study is to validate and compare to the experimental results of the Pod type waterjet with the developed CFD in-house code based on the RANS equations. The developed code has been validated by comparing with the experimental results of the well-known turbine problem. The validation also extended to the flush type waterjet where the pressures along the duct surface and also velocities at nozzle area have been compared with experimental results. The Pod type waterjet has been designed and the performance of the designed waterjet system including duct, impeller and stator was analyzed by the previously mentioned m-house CFD Code. The pressure distributions and limiting streamlines on the blade surfaces were computed to confirm the performance of the designed waterjets. In addition, the torque and momentum were computed to find the entire efficiency and these were compared with the model test results. Measurements were taken of the flow rate at the nozzle exit, static pressure at the various sections along the duct and also the nozzle, revolution of the impeller, torque, thrust and towing forces at various advance speed's for the prediction of performance as well as for comparison with the computations. Based on these measurements, the performance was analyzed according to the ITTC96 standard analysis method. The full-scale effective and the delivered power of the wheeled vehicle were estimated for the prediction of the service speed. This paper emphasizes the confirmation of the ITTC96 analysis method and the developed analysis code for the design and analysis of the Pod type waterjet system.

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참고문헌

  1. Allison, J.L., 1993. Marine waterjet propulsion. Trans. SNAME., 101, pp. 275-335.
  2. Allison, J.L. and Jiang, C.B., 1998. Modern tools for waterjet pump design and recent advances in the field. International Conference on Waterjet Propulsion II , RINA, Amsterdam, pp. 1-19.
  3. Chien, K.Y., 1982. Prediction of channel and boundary-layer flows with a low-Reynolds number turbulence model. AIAA Journal, 20, pp. 33-38. https://doi.org/10.2514/3.51043
  4. Chun, H.H. Park, W.K. and Jun, J.G., 2002. Experimental and CFD analysis for rotor-stator interaction of waterjet pump. Proc. of 24th Symposium on Naval Hydrodynamics, Japan, 8-13 July 2002.
  5. Chun, H.H. Kim, M.C. Ahn, B.H. and Cha, S.M., 2003. Selfpropulsion test and analysis of an amphibious tracked vehicle with waterjet. Proceedings of World Maritime Technology Conference and SNAME Annual Meeting, Paper No. D6 (D-133), USA.
  6. Dring, R.P. Joslyn, H.D. Hardin, L.W. and Wagner, J.H., 1982. Turbine rotor-stator interaction. Journal of Engineering for Power, 104, pp. 729-742. https://doi.org/10.1115/1.3227339
  7. Kim, M.C. and Chun, H.H., 2007. Experimental investigation into the performance of the axial-flow-type waterjet according to the variation of impeller tip clearance. Journal of Ocean Engineering, 34, pp. 275-283. https://doi.org/10.1016/j.oceaneng.2005.12.011
  8. Leonard, B.P., 1976. A stable and accurate convective modeling procedure based on quadratic upstream interpolation. Computer Method in Applied Mechanics and Engineering, 19, pp. 729-742.
  9. Ockfen, A.E. and Matveev, K.I., 2009. Aerodynamic characteristics of NACA 4412 airfoil section with flap. International Journal of Naval Architecture and Ocean Engineering, 1(1), pp. 1-12. https://doi.org/10.3744/JNAOE.2009.1.1.001
  10. Park, W.G. and Sankar, L.N., 1993a. An iterative time marching procedure for unsteady viscous flows. ASME-FED, 20.JUlOK
  11. Park, W.G., Sankar, L.N., 1993b. Numerical simulation of viscous flow around a propeller. AIAA Paper No. 93-3056.
  12. Park, W.G. Kim, H.W. Jung, Y.R. and Park, E.D., 1996. Unsteady incompressible turbulent flow simulation of the rotor-stator configuration. Proceedings of the International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, 2, pp. 257-267.
  13. Park, W.G. Jang, J.H. Chun, H.H. and Kim, M.C., 2006. Numerical flow and performance analysis of waterjet propulsion system. Journal of Ocean Engineering, 32, pp. 1740-1760.
  14. Taylor, T.E. and Kerwin, J.E., 1998. Waterjet pump design and analysis using a coupled lifting surface and RANS procedure. Proceedings of International Conference on Waterjet PropulsionⅡ, RINA, No. 5, Amsterdam, pp. 1-9.
  15. Taylor, T.E. and Kimball, R.W., 1999. Experimental validation of a coupled lifting-surface/RANS procedure for waterjet pump and design analysis. Proceedings of FAST ’99, Seattle, pp. 893-900.
  16. Van Manen, J.D., 1962. Effect of radial load distribution on the performance of shrouded propellers. Spring Meeting SNAME.
  17. Viecelli, J.A., 1969. A method for including arbitrary external boundaries in the MAC incompressible fluid computing technique. Journal of Computational Physics, 4(4), pp. 543-551. https://doi.org/10.1016/0021-9991(69)90019-9