摘要
某船艇机舱温度过高,影响到乘员的健康与动力装置的动力性能。因此,对舱内空气流场研究十分必要。建立了机舱几何模型以及舱内空气流动的数学模型,采用k-ε方程湍流模型对舱内的湍流流动进行描述,对机舱内空气的速度场和温度场进行了三维数值模拟与分析,并对温度场的模拟结果进行了实验验证。验证结果表明,模拟值与测试值最大相对误差为9·2%,其精度能够满足工程需要,该数值模拟方法可用于机舱内空气流动的分析研究。
The excess temperature in a ship cabin has serious influence on the health of shipman and the working performance of engine device. Airflow field study of the ship cabin is necessary. Geometrical model of the ship cabin and mathematical model for the air flow in the ship cabin were established. Turbulent flow was described by using the κ - ε two-equation turbulence model in the cabin. The temperature and velocity fields of 3D air flow were numerically simulated and analyzed. The simulated results of the temperature field were tested by an experiment. The simulation results show that the maximum relative error between simulated value and test value is 9. 2% and the accuracy satisfies the engineering requirements. This numerical simulation can be used for studying airflow in ship cabin.
出处
《舰船科学技术》
北大核心
2008年第1期149-152,共4页
Ship Science and Technology
关键词
柴油机
机舱
空气流场
数值模拟
diesel engine
ship cabin
airflow field
numerical simulation
