地效翼船水橇的外形设计及水动力特性的数值模拟

摘要

In the development course of wing-in-ground effect vehicle ,there remains one major technical issue ,i .e .in the process of taking off the lift-drag ratio is too small to lift the aircraft body out from the water rapidly .To solve this difficult problem ,according to the hull theory ,wing design theory and the Theodore Von Karman wa-ter impact theory ,a new hydro-ski applied in wing-in-ground effect vehicle is designed ,and the software CATIA is used to draw 3D model of the hydro-ski ,and the FLUENT is used to figure out the vehicle’s hydrodynamic characteristics .Results show that lift coefficient and drag coefficient of the hydro-ski increases as the angle of attack increases .In addition ,the lift-drag ratio curve is shown as a parabola ,peaking at 5° .In the meantime , when the incoming flow velocity is 2 m/s ,the lift coefficient ,drag coefficient and CL/CD is larger than that of the others .%地效翼船的发展过程中，必须解决一大技术性难题：起飞过程中升阻比较小，使得船身无法快速抬离水面。基于以上问题，根据船身理论、机翼设计理论和冯·卡门入水冲击理论等，设计一种应用于地效翼船的水橇，利用CATIA对水橇进行三维建模，并使用FLUENT 软件对该水橇进行水动力特性的数值模拟。结果表明：水橇的升力系数和阻力系数随着攻角的增大而增大，其升阻比呈抛物线趋势，在攻角为5°左右到达最大值；相对其他来流速度，水橇在来流速度2m/s时的升力系数、阻力系数和升阻比更大。