摘要
文章根据极地环境下,船舶海水系统内冰晶生长的特点,分析不同无量纲过冷度下冰晶生长对换热器性能的影响,对其进行相场模拟,找出换热器的最佳工作区间。模拟结果表明,无量纲过冷度由0.3上升到0.6时,凝固潜热的释放越来越容易,冰晶与换热器的换热越来越充分,换热器的效率不断提升。但是当无量纲过冷度达到0.5和0.6时,冰晶的生长速度过快,在海水管道系统内形成冰堵,导致船舶换热器无法正常运行。综合考虑,应将无量纲过冷度控制在0.4附近,才能保证船舶换热器正常高效的运行。
According to the characteristics of ice crystals in sea water piping system under the polar environment, the influence of ice crystal growth on the heat exchanger performance under different dimensionless super - cooling degree was analyzed, and Phase field simulation was done to find the best working range of the heat changer. The simulation results show that the latent heat of solidification becomes more and more easily when dimensionless super - cooling degree increases from 0.3 to 0.6, the heat transfer between the ice crystal and exheat exchanger is more and more complete, and the efficiency of the heat exchanger is increasing. But when the dimensionless super - cooling degree reaches 0.5 and 0.6, the growth rate of ice crystal is too fast, and the ice block is formed in the sea water piping system, so the ship heat exchanger can not work normally. In general, the dimensionless supercooling degree should be controlled in the vicinity of 0.4 to ensure the normal and efficient operation of the ship heat exchanger.
出处
《中国修船》
2017年第2期45-48,共4页
China Shiprepair
基金
国家自然科学基金项目"冰晶对极地运输船海水系统的传热影响机理研究"(51479152)
关键词
极地船
海水系统
相场模拟
过冷度
冰晶生长
换热器
polar ship
sea water piping system
phase field simulation
super- cooling degree
ice crystalgrowth
heat exchanger
