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针对两栖车辆水上行驶时,车体包络线对黏性阻力的影响问题,基于RANS方程结合k-ε湍流模型,利用“刚盖”假定,不计兴波阻力及来流湍流度的影响,进行了某两栖车车体模型静水航行的数值模拟。分析了车体在特定速度下,车体包络线的局部改变对黏压阻力系数和摩擦阻力系数的影响。通过分析对比模拟结果,提出了对车体局部细节的优化意见。
In view of the influence of body envelope on viscous resistance when amphibious vehicle is driving on water, based on the RANS equation combined with k-ε turbulence model and using the assumption of “rigid cover”, irrespective of the influence of wave resistance and turbulence , Carried out a amphibious car body model hydrostatic navigation numerical simulation. The influence of local changes of body envelope on viscous drag coefficient and friction drag coefficient at a specific speed was analyzed. By analyzing and comparing the simulation results, the optimization opinions on the details of the car body are proposed.