基于体积力模型的潜艇应急上浮运动数值模拟分析

目的]为了探索潜艇应急上浮运动的规律,基于体积力的螺旋桨简化模型,开展不同航速下潜艇的应急上浮运动数值模拟。方法]对艇体水下定深直航、上浮以及上浮出水进行数值模拟,对比分析不同航速下潜艇上浮过程中艇的螺旋桨转速与航速的匹配,以及上浮运动时间和艇体姿态的变化。结果]结果显示,随着螺旋桨转速的增大,潜艇获得稳定航速的时间越短,在水下定深直航运动的时间也越短;无论是纵倾角还是横倾角,其第1次发生变化的时刻、产生峰值的时刻等随转速的增大呈减小趋势,同时随着转速的增大,纵倾角的来回震荡波动时间会越来越长,而横倾角的来回震荡波动时间则越来越短。结论]相关计算方法和研究结果对潜艇应急上浮运动研究具有一定的实际参考价值。

Numerical simulation of emergency surfacing motion of submarine based on volumetric force model

Objectives]In order to explore the laws of the emergency surfacing motion of submarines,a simplified model of propeller volume force was used to carry out the numerical simulation of submarine emergency surfacing motion at different speeds.Methods]Numerical simulations of the underwater fixed depth,ascent and surfacing of the hull were carried out,and submarine buoyancy under different speeds was compared and analyzed by matching the screw rotation speed with the speed of the submarine,as well as its ascent time and attitude.Results]As the results show,the faster the rotation speed,the shorter the time for the submarine to gain steady speed and maintain fixed depth underwater.Regardless of the trim angle or heeling angle,the time when the angle changes for the first time and that when the peak occurs show a trend of reduction although the rotational speed increases.At the same time,with the increase in rotation speed,the fluctuation time of trim angle increases,while the fluctuation time of heeling angle decreases.Conclusions]The relevant calculation methods and results of this study can provide practical references for research on submarine emergency surfacing motion.