潜艇近海底与近水面绕流数值模拟研究  

Numerical simulation of flow around submarine operating close to the bottom or near surface

作　　者：张楠[1] 沈泓萃[1] 姚惠之[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2007年第4期498-507,共10页Journal of Ship Mechanics

摘　　要：采用求解RANS方程的方法,结合RNG k-ε湍流模型,对于某潜艇模型近海底和近水面绕流进行了数值模拟。计算了不同海底深度下潜艇模型的阻力、垂向力和俯仰力矩,也计算了同一海底深度下潜艇阻力随傅氏数的变化,研究表明当海底深度超过二分之一艇长时,海底对阻力的影响可忽略不计。自由液面捕捉采用VOF(Volume of Fluid)方法。计算了不同浸深下潜艇模型的阻力和自由液面波型,同时又研究了同一浸深下阻力和波型随傅氏数的变化趋势。研究表明,当浸深超过三分之一艇长时,自由液面波高迅速减小,自由液面对阻力的影响可忽略不计。计算结果与试验结果吻合较好。　The flow around submarine operating close to the bottom or near surface were numerically simulated by solving RANS equations with RNG k-ε 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.

关 键 词：计算船舶流体力学 潜艇 近水面 近海底 VOF 

分 类 号：U661.3[交通运输工程—船舶及航道工程]