提高两栖车辆水上行驶速度的车体设计方案研究

考虑到两栖车辆的车体小、质量大，提高其海上滑行时的升阻比系数是降低车头离水所需速度，减少水阻，实现高速航驶的关键之一。提出了根据边界层和湍流仿真理论确定数值计算时车体边界网格划分的时方法，采用VOF(Volume of Fluid)多相流模型对不同车体方案在不同速度下的水上性能进行了并行数值计算和对比，发现适当增加车体攻角以及在车体裙板加薄翼滑板的复合型车体是提高升阻比系数的有效方案。

Research on Amphibious Vehicle Body Design Concepts for Raising Its Navigation Speed

Since the amphibious vehicle has a small body and large mass,raising the liftdray ratio is a key to decrease the velocity at which the vehicle nose takes off water surface,to reduce the resistance and to realize high speed navigation.The method with which the body wall is meshed was proposed by the theories of boundary layer and turbulence simulation.The performance on water was calculated parallelly and numerically and contrasted by the volume of fluid multiphase flow model at different schemes of the vehicle body and velocities of the vehicle.The results illustrate that enlarging the attack angle and adding the side hydrofoil on the skirting plate are useful for improving lift-drag ratio coefficient.