摘要
在船舶机舱通风方案设计阶段,通过对某船舶机舱大空间内前后集中和左右集中两种通风口布置方式进行三维CFD模拟,得到机舱内部上下层的气流组织,比较了两种送排风方案对机舱内部流动的影响,表明前后集中送风方式ADPI值更高、回流区更小、无明显气流短路,总体气流组织优于左右集中送风。在此风口布置基础上,进一步引入射流通风系统,仿真结果表明射流通风结合传统送风有效的避免了短路和通风死角,降低了设备局部热点温度约4℃,具有较好的实船应用前景。
In the schematic stage of ship＇s engine-room ventilation design, three-dimensional CFD simulation is adopted to compare the flow distribution of ship＇s engine room equipped with vents arrangement of left-right and bow-stern. Flow evaluation index is considered better with higher ADPI value and lower averaged temperature around engine. Numerical results show that under bow-stern vents arrangement the flow i＇s more uniform with smaller recirculation zone and the temperature is lower. To further improve the flow distribution, the jet ventilation is added to the engine room. Simulation results show that the jet ventilation combined with traditional supply effectively avoid the short circuit, which reduces the local hot spot temperature by 4 ℃ around the engine. This indicates the jet combined with traditional ventilation has a good application prospect.
出处
《机电设备》
2017年第6期57-63,共7页
Mechanical and Electrical Equipment
关键词
机舱通风
CFD仿真
气流评价指标
射流
engine room ventilation
CFD simulation
flow evaluation index
jet
