摘要
船舶在冰区航行时,存在冰晶颗粒混合海水流入船舶冷却系统现象。基于颗粒动力学理论,建立适用于海水-冰晶两相流的欧拉-欧拉双流体模型,耦合相间传热传质模型对海水-冰晶两相流在水平直管内流动及传热特性数值模拟。研究表明,冰晶颗粒流动过程中,在管道上部位置R为8 mm^10 mm处冰晶体积分数达到最大值,且随着速度增加而增大;当入口含冰率(IPF)为4%时,冰晶速度的最大值出现在管道中心轴线上方。当入口速度为1.0m/s^3.0m/s,含冰率4%~30%时,局部传热系数随入口速度及含冰率增大而增加。
When the ship is sailing in the ice area,there is phenomenon that the ice crystal mixed with seawater flows into the cooling system of the ship.Based on particle dynamics theory,an Eulerian-Eulerian two-fluid model suitable for seawater-ice crystal two-phase flow is established.The numerical simulation of flow and heat transfer characteristics of seawater-ice crystal two-phase flow in heat exchange tubes is carried out by coupled heat and mass transfer model.The results show that the flow of ice crystal particles,the number of ice crystals reaches the maximum at the upper position of the pipe at R=8 mm^10 mm,and increases with the increase of speed.When the inlet IPF is 4%,the maximum value of the ice crystal velocity appears at the central axis of the pipe.When the inlet speed is 1.0 m/s^3.0 m/s and the ice content is 4%~30%,the local heat transferring coefficient increases with the inlet speed and ice content.
作者
陈海文
李捷
陈迪林
徐立
黄长绪
CHEN Haiwen;LI Jieu;CHEN Dilin;XU Li;HUANG Changxu(Key Laboratory of High Performance Marine Technology,Ministry of Education,Wuhan University of Technology,Wuhan 430063,China;School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《船舶工程》
CSCD
北大核心
2020年第9期30-35,共6页
Ship Engineering
基金
国家自然科学基金(51479152)
船舶动力工程技术交通运输行业重点实验室开放基金(KLMPET2018-01)
中央高校基本科研业务费专项资金(2019Ⅲ046GX)。
关键词
海水-冰晶两相流
颗粒分布
速度分布
传热特性
seawater ice crystal two-phase flow
particle distribution
velocity distribution
heat transfer characteristics
