Numerical simulation of flow around submarine operating close to the bottom or near surface
Numerical simulation of flow around submarine operating close to the bottom or near surface
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发表时间：
2007
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通讯作者：
Yao Hui-zhi
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作者：
Yao Hui-zhi
采用RNG k-e湍流模型求解RANS方程，对潜艇近底或近水面航行时的绕流进行了数值模拟，计算了某潜艇模型在不同水深时的垂向力和纵摇力矩，并研究了阻力随弗劳德数的变化规律，结果表明，只要水深大于1/2，水深对阻力的影响可以忽略不计。2潜艇长度。自由表面用VOF捕获为此，本文计算了一个潜艇模型在不同沉没深度时的阻力和波型，并研究了阻力和波型随弗劳德数的变化规律。结果表明，当沉没深度大于1/2时，自由水面对阻力和波型的影响可以忽略不计。计算结果与模型试验结果比较，吻合较好。
The flow around submarine operating close to the bottom or near surface were numerically simulated by solving RANS equations with RNG k-e turbulence model.The resistance,vertical force and pitching moment of a submarine model at different depths of bottom were computed.And the change of resistance with Froude number was studied.It indicates that the bottom has a neglectable effect on resistance as long as the depth of bottom more than 1/2 submarine length.Free surface was captured with VOF(Volume of Fluid) method.So the resistance and wave pattern of a submarine model at different depths of submergence were computed.And the change of resistance and wave pattern with Froude number were investigated.It indicates that the free surface has a neglectable effect on resistance and wave pattern as long as the depth of submergence more than 1/3 submarine length.The comparison between the prediction and the model test measurement shows fairly good agreement.