电伴热下极地装备踏步板构件的对流换热影响

Influence of Convection Heat Transfer of Tread Plate in Polar Environment

为解决恶劣极地环境引起的海洋装备防寒问题,工程上通常采用电伴热的方式.采用数值模拟和实验的方法,对电伴热踏步板构件在典型极地环境下热平衡的影响因素进行分析.环境要素为风速和温度,风速为0~40 m/s、温度为-40~0℃.基于数值仿真和实验测试获得电加热踏步板构件在不同风速及温度下的对流换热系数.结果表明,增大风速和降低温度都会增大踏步板的对流换热系数;风速是影响踏步板换热的主要因素,而温度的影响较小.基于实验数据,参考平板构件对流换热的经典理论,建立电加热踏步板构件的对流换热系数预测模型,并采用数值仿真验证该模型的正确性.

To solve the problem of cold protection for marine equipment against cold caused by the harsh polar environment,electrical tracing is commonly used in engineering.In this paper,numerical simulation and experimental methods are used to analyze the influencing factors of thermal balance of electric heat tracing tread plate components in typical polar environment with wind speed ranging from O to 40 m/s and temperature ranging from-40℃to 0℃.Based on numerical simulation and experimental test,the convective heat transfer coefficient of electric heating tread plate components at different wind speeds and temperatures is obtained.The results show that increasing wind speed and decreasing temperature will increase the convective heat transfer coefficient of the tread plate.Wind speed is the main factor affecting the heat transfer of the tread plate,while temperature has little effect.Finally,based on the experimental data and the classical theory of convective heat transfer of plate components,a prediction model of convective heat transfer coefficient of electric heating tread plate components is established,and the correctness of the model is verified by numerical simulation.