DOI QR코드

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Endplate effect on aerodynamic characteristics of three-dimensional wings in close free surface proximity

  • Jung, Jae Hwan (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Mi Jeong (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Yoon, Hyun Sik (Global Core Research Center for Ships and Offshore Plants, Pusan National University) ;
  • Hung, Pham Anh (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Chun, Ho Hwan (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Park, Dong Woo (Maritime Research Institute, Hyundai Heavy Industries Co. Ltd.)
  • 발행 : 2012.12.31

초록

We investigated the aerodynamic characteristics of a three-dimensional (3D) wing with an endplate in the vicinity of the free surface by solving incompressible Navier-Stokes equations with the turbulence closure model. The endplate causes a blockage effect on the flow, and an additional viscous effect especially near the endplate. These combined effects of the endplate significantly reduce the magnitudes of the velocities under the lower surface of the wing, thereby enhancing aerodynamic performance in terms of the force coefficients. The maximum lift-to-drag ratio of a wing with an endplate is increased 46% compared to that of wing without an endplate at the lowest clearance. The tip vortex of a wing-with-endplate (WWE) moved laterally to a greater extent than that of a wing-without-endplate (WOE). This causes a decrease in the induced drag, resulting in a reduction in the total drag.

키워드

참고문헌

  1. Ahmed, N.A. and Goonaratne, J., 2002. Lift augmentation of a low-aspect-ratio thick wing in ground effect. Journal of Aircraft, 39(2), pp.381-384. https://doi.org/10.2514/2.2940
  2. Ahmed, M.R. and Sharma, S.D., 2005. An investigation on the aerodynamics of a symmetrical airfoil in ground effect. Experimental Thermal and Fluid Science, 29(6), pp.633-647. https://doi.org/10.1016/j.expthermflusci.2004.09.001
  3. Chun, H.H., Chang, J.H., Paik, K.J. and Chang, S.I., 1997. Preliminary design of a 20 passenger PARWIG craft and construction of a 1/10 scale radio controlled model. Proceeding of International Conference on FAST Sea Transportation. Sydney, Australia, 513-520.
  4. Chun, H.H. and Chang, C.H., 2002. Longitudinal stability and dynamic motions of a small passenger WIG craft. Ocean Engineering, 29(10), pp.1145-1162. https://doi.org/10.1016/S0029-8018(01)00098-1
  5. Fink, P.M. and Lastinger, L.J., 1996. Aerodynamics characteristics of Low-Aspect-Ratio wings in close proximity to the ground. Report, TN D-926. USA, NASA.
  6. Fluent, 2009. Fluent user's guide version 12.0.3. Lebanon , ANSYS Inc.
  7. Hirt, C.W. and Nichols, B.D., 1981. Volume of fluid (VOF) method for the dynamics of free boundaries. Journal of Computational Physics, 39, pp.201-225. https://doi.org/10.1016/0021-9991(81)90145-5
  8. Hsiun, C.M. and Chen, C.K., 1995. Numerical investigation of the thickness and camber effects on aerodynamic characteristics for two-dimensional airfoils with ground effect in viscous flow. Transactions of the Japan Society for Aeronautical and Space Sciences, 38(119), pp.77-90.
  9. Hsiun, C.M. and Chen, C.K., 1996. Aerodynamic characteristics of a two-dimensional airfoil with ground effect. Journal of Aircraft, 33(2), pp.386- 392. https://doi.org/10.2514/3.46949
  10. Han, C., Cho, L. and Cho, J., 2005. Wake shapes behind wings in close formation flight near the ground. Journal of Mechanical Science and Technology, 19(2), pp.674-681. https://doi.org/10.1007/BF02916189
  11. Jung, J.H., Yoon, H.S., Chun, H.H., Hung, P.A. and Elsamni, O.A., 2012. Mean flow characteristics of two-dimensional wings in ground effect. International Journal of Architecture and Ocean Engineering, 4(2). pp.151-161. https://doi.org/10.3744/JNAOE.2012.4.2.151
  12. Kim, S.K., Suh, S.B., Lee, D.H. and Kim, K.E., 1997. Wind tunnel test study on the wings of WIG ship. Journal of the Society of Naval Architects of Korea, 34(1), pp.60-67.
  13. Kim, Y., Lee, J.E., Shin, M.S., Kang, K.J. and Kwon, J.H., 2006. Turbulent flow simulation on the ground effect about a 2-dimensional airfoil. Journal of computational fluids engineering, 11(4), pp.81-89.
  14. Mizutani, N. and Suzuki, K., 1993. Numerical analysis of 3-D WIG advancing over the still water surface. Journal of the Society of Naval Architects of Japan, 174, pp.35-46.
  15. Moon, Y.J., Oh, H.J. and Seo, J.H., 2005. Aerodynamic investigation of three-dimensional wings in ground effect for aerolevitation electric vehicle. Aerospace Science and Technology, 9(6), pp.485-494. https://doi.org/10.1016/j.ast.2005.01.005
  16. Nuhait, A.O. and Mook, D.T., 1989. Numerical simulation of wings in steady and unsteady ground effects. Journal of Aircraft, 26(12), pp.1081-1089. https://doi.org/10.2514/3.45884
  17. Raymond, A.E., 1921. Ground influence on aerofoil. Report, NACA Technical Note 67. USA, Massachusetts Institute of Technology.
  18. Reid, E.G., 1927. A full-scale investigation of ground effect. Report, NACA Technical Report 265. USA, Langley Memorial Aeronautical Laboratory.
  19. Recant, I.R., 1939. Wind-tunnel investigation of ground effect on wings with flap. Report, NACA Technical Note 705. USA, Langley Memorial Aeronautical Laboratory.
  20. Serebrisky, Y.M., Biachuev, S. A., 1946. Wind-tunnel investigation of the horizontal motion of a wing near the ground. Report, NACA Technical Note 1095. USA, Central Aero-Hydrodynamical Institute.
  21. Shin, M.S., Yang, S.I., Joo, Y.R., Kim, S.K., Bae, Y.S., Kim, J.H. and Chun, H.H., 1997. Wind tunnel test results for eight and twenty passenger class WIG effect ships. Proceeding of International Conference on FAST Sea Transportation. Sydney, Australia, 565-570.
  22. Zerihan, J. and Zhang, X., 2000. Aerodynamics of a single element wing in ground effect. Journal of Aircraft, 37(6), pp. 1058-1064. https://doi.org/10.2514/2.2711
  23. Zhang, X., Zerihan, J., Ruhrmann, A. and Deviese, M., 2002. Tip vortices generated by a wing in ground effect. Proceedings of the 11th International Symposium on Applications of Laser Techniques to Fluid Mechanics. Lisbon, Portugal.