Based on the test parameters of a rigid oscillating single aerofoil,it introduces a developed fluid-structure interaction approach "Euler-Lagrange coupling method" into the hydrodynamic performance *** exper...
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Based on the test parameters of a rigid oscillating single aerofoil,it introduces a developed fluid-structure interaction approach "Euler-Lagrange coupling method" into the hydrodynamic performance *** experimental results display this numerical simulation method provides more accurate data than another theoretical ***,this method is used to investigate the characteristics of flexible oscillating dual-aerofoil(wing-in-ground effect) propulsion system,which combines not only the advantages of dual aerofoils over the single one but also the superiorities of flexible aerofoil over the *** under the rigid aerofoil condition,it clearly verifies that better propulsive performance is able to be obtained from dual-aerofoil thrusters than the single one with aerofoil motion frequency *** then,considering the change of dual-aerofoil flexibility,it has been obviously proved that both hydrodynamic data and structure dynamic responses are changed along with elastic ratio by contrast *** importantly,the wing-in-ground effect is obviously presented by vortex diffusion delaying and structure stress concentration,when dual aerofoils move towards and apart from each *** the smaller elastic ratio of aerofoil is,the larger aerofoil deformation becomes,due to wing-in-ground effect.
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