风速对寒区船舶杆件结构霜冰结冰的影响分析

Analysis of the influence of wind speed on rime and ice formation of ship's pole structure in cold region

针对寒区船舶杆件结构的结冰问题,采用Fluent和Fensap-ice相结合的方法对杆件结构结冰开展数值模拟。选取风速作为敏感参数,分析了风速变化对结冰厚度和结冰量的影响,得出如下结论:随着风速从1 m/s增加到7 m/s,杆件表面冰厚最大值的位置逐渐向左移动,因为水滴速度随来流速度的增加而增加,在位移相同时水滴更快到达结构表面,水滴运动轨迹偏转更小,更多的水滴撞击到0°位置处,冰厚最大值也随之向0°方向移动;风速为7 m/s时杆件表面的冰厚并未远大于1 m/s时的冰厚,因为风速为1 m/s时圆柱表面所结霜冰的密度仅为7 m/s时的22.8%,当质量一定时,冰的密度越小体积就会越大,因此虽然1 m/s时结冰量仅为7 m/s的18.1%,但冰厚并未远小于7 m/s时的冰厚;在风速为1~7 m/s区间内,随着风速的增加,杆件表面的结冰量近似的呈线性方式增加。

Aiming at the ice problem of the ship's pole structure in the cold region,using Fluent and FENSAP-ICE combined method to carry out numerical simulation on icing of rod structure.The wind speed is selected as the sensitive parameter,and the influence of the change of the wind speed on the ice thickness and the ice quality is analyzed.The conclusion is as follows:with the increase of the wind speed from 1 m/s to 7 m/s,the position of the maximum ice thickness on the pole surface gradually moves to the left,because the water droplet velocity increases with the increase of the inflow velocity,at the same time of displacement,the water droplet reaches the structure surface faster,the deflection of the water droplet trajectory is smaller,more water droplets hit the 0°position,and the maximum ice thickness also moves to the 0°direction;when the wind speed is 7 m/s,the ice thickness on the rod surface is not much greater than that when the wind speed is 1 m/s,because when the wind speed is 1 m/s,the rime density on the cylinder surface is only 22.8%of that at 7 m/s,when the mass is fixed,the smaller the ice density is,the larger the ice volume is.Therefore,although the ice volume at 1 m/s is only 18.1%of that at 7 m/s,the ice thickness is not much less than that at 7 m/s;in the wind speed range of 1~7 m/s,with the increase of wind speed,the ice quality on the rod surface increases approximately in a linear way.