In this study, oscillations of an airfoil in a viscous, turbulent, and unsteady flow near a water surface have been numerically simulated to optimize the effect of geometric and oscillatory parameters on aerodynamic coefficients of airfoil. In this simulation, the Navier-Stokes equations are dissected using finite volume method with second-order accuracy and are solved by the Pimple-algorithm and the genetic algorithms in the surface response methodology (RSM) has are used for optimization. In the process of simulation, volume fractionation method has been used to predict the free surface of the flow. Comparing a part of the results of this simulation with numerical data for an oscillating airfoil near the ground confirms the accuracy of the investigation. This simulation is done in three reduced frequencies, three amplitudes and three flight altitudes. The results show that flight altitude is more effective on aerodynamic coefficients than two other parameters near the surface. Also, optimization done by surface response method and genetic algorithm, the results are shown airfoil in dimensionless flight altitude 0.539, reduced frequency 0.5 and dimensionless amplitude 0.025 create the optimal value of the ratio of the coefficient of lift to drag.
Wiesesberger, C. “Wing Resistance Near the Ground”, NASA, Report Number: NACA-TM-77, Vol. 1, No. 10, pp. 145–147, 1921.
Rozhdestvensky, K.V. “Matched Asymptotic in Aerodynamics of WIG Vehicles”; The Intersociety High Performance Marine Vehicles Conference and Exhibit, HMPV 92, St. Petersburg, Russia, 1992.
Rozhdestvensky, K.V. “Wing-in-ground Effect Vehicles”, Progress in Aerospace sciences, Vol. 42, No. 3, pp. 211–283, 2006.
Xin, Z. and Jonathan, Z. “Aerodynamics of a Double Element Wing in Ground Effect”, American Institute of Aeronautics and Astronautics Journal. Vol. 41, No. 6, pp. 1007-1016, 2003.
Cui, E.J. “Advance and Problems in WIG Vehicle Research and Application”; High Performance Marine Vehicles, Shanghai, China, Vol. 1, No. 15, pp. 1–6, 2003.
Ahmed, M.R., Sharma, S.D. “An Investigation on the Aerodynamics of a Symmetrical Airfoil in Ground Effect”, Experimental Thermal and Fluid Science. Vol. 29, No. 6, pp. 633-647, 2005.
Ogurek, D. and Ashworth, J. “Experimental Investigation of Various Winglet Designs for a Wing in Ground Effect”; The 22nd Applied Aerodynamics Conference and Exhibit., Rhode Island, Greece, pp. 4720, 2004.
Kliment, L. and Rokhsaz, K. “Experimental Investigation of Pairs of Vortex Filaments in Ground Effect”, J. Aircraft, Vol. 45, No. 2, pp. 622-629, 2008.
Park, K., Kim, B.S., Lee, J., and Kim, K.S. “Aerodynamics and Optimization of Airfoil Underground Effect”, Int. J. Mechanical Systems Sci. and Eng. Vol. 40, No. 9, pp. 332- 339, 2009.
Lee, J., Hong, C., Kim, B., Park, K., and Ahn, J. “Optimization of Wings in Ground Effect Using Multi-Objective Genetic Algorithm”; The 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Orlando, Florida, 2010.
Djavareshkian, M.H., Esmaeli, A., and Parsani, A. “A Comparison of Smart and Conventional Flaps Close to Ground on Aerodynamic Performance”, Aerospace Science and Technology, Vol. 7, No. 2, pp. 93-106, 2010.
Djavareshkian, M.H., Esmaeli, A., and Parsani, A. “Aerodynamics of Smart Flap under Ground Effect”, Aerospace Science and Technology. Vol.15, No. 8, pp. 642-652, 2011.
Pillai, N.S., Anil, T., Aravind, R., Vinod, R., Kumer, S.E., Zaid, Z.U., Antony, J.K., and Manojkumar, M. “Investigation on Airfoil Operating in Ground Effect Region”, Int. J. Eng. & Techn Vol. 3, No. 4, pp. 540–544, 2014.
Qu, Q., Lu, Z., Liu, P., and Agarwal, R.K. “Numerical Study of Aerodynamics of a Wing-in-Ground-Effect Craft”, J. Aircraft, Vol. 51, No. 3, pp. 913-924, 2014.
Qu, Q., Ju, B., Huang, L., and Liu, P. “Flow Physics of a Multi- element Airfoil in Ground Effect”; The 54th AIAA Aerospace Sciences Meeting. San Diego, California, USA, 2016.
Lee, J.H., Kim, B.S., and Park, K.W. “Aerodynamic Characteristics and Shape Optimization of Airfoils in WIG Craft Considered Ground Effect”, Transactions of the Korean Society of Mechanical Engineers, Vol 30, No. 11, pp. 1084-1092, 2006.
Park, K., Kim, B.S., Lee, J., and Kim, K.S. “Aerodynamics and Optimization of Airfoil under Ground Effect”, Int. J. Mech. Sci. and Eng. Vol. 1, No. 4, pp. 385-391, 2009.
Lee, S.H. and Lee, J. “Aerodynamic Analysis and Multi-objective Optimization of Wings in Ground Effect”, Ocean Engineering, Vol. 68, No. 1, pp. 1-13, 2013.
Esmaeili, A., Djavareshkian, M.H., and Parsania, A. “Optimization of Moving Wing in Ground Effect, Using Response Sureface Method”, J. Aerosp. Sci. Technol Soc., Vol. 10, No. 2, pp. 37-47, 2013.
Menter, F.R. “Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications”, American Institute of Aeronautics and Astronautics J., Vol. 32, No. 8, pp. 1598-1605, 1994.
Hirt, C.W.and Nichols, B.D. “Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries”, J. Computational Physics. Vol. 39, No. 1, pp. 201-225, 1981.
Rodriguez, D.L. “Response Surface Based Optimization with a Cartesia CFD Method”, The 23rd AIAA Applied Aerodynamics Conf., Toronto, Ontario, 2003.
McCall, J. “Genetic Algorithms for Modelling and Optimization”, J. Comp. and Appl. Math., Vol. 184, No. 1, pp. 205-222, 2005.
Sharma, S. and Clement, S. “CFD Simulation of the Flow Characteristics of NACA0012 and DHMTU Airfoils in Ground Effect”; In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers Digital Collection. Chicago, Illinois, USA, 2014.
Moryossef, Y. and Levy, Y. “Effect of Oscillations on Airfoils in Close Proximity to the Ground”, American Institute of Aeronautics and Astronautics J., Vol. 42, No. 9, pp.1755-1764, 2004.
Azargoon, Y., & Esmaeili far, E. (2019). Optimize motion characteristics of Oscillation Airfoil near the Water Surface using Genetic Algorithm and RSM. Fluid Mechanics & Aerodynamics, 8(1), 81-93.
MLA
Yeganeh Azargoon; Esmaeil Esmaeili far. "Optimize motion characteristics of Oscillation Airfoil near the Water Surface using Genetic Algorithm and RSM", Fluid Mechanics & Aerodynamics, 8, 1, 2019, 81-93.
HARVARD
Azargoon, Y., Esmaeili far, E. (2019). 'Optimize motion characteristics of Oscillation Airfoil near the Water Surface using Genetic Algorithm and RSM', Fluid Mechanics & Aerodynamics, 8(1), pp. 81-93.
VANCOUVER
Azargoon, Y., Esmaeili far, E. Optimize motion characteristics of Oscillation Airfoil near the Water Surface using Genetic Algorithm and RSM. Fluid Mechanics & Aerodynamics, 2019; 8(1): 81-93.
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