极地海洋工程装备平板构件的对流换热影响分析

Analysis on the influence of convective heat transfer of polar ocean engineering equipment plate components

电伴热是极地海洋工程装备防寒主要措施,热平衡是对流换热的关键问题。本文以平板构件为研究对象,采用数值模拟和模型试验相结合的方法,开展极地复杂环境因素对海洋工程装备电加热平板构件热平衡影响分析。首先选取风速、温度为主要环境参数,风速为0~40m·s^(–1)、温度为–40~0℃,基于Fluent仿真和试验测试获得电加热平板构件在不同风速、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使平板的对流换热系数增大,在风速一定的情况下,温度对平板的换热影响较小;在温度一定的情况下,平板的对流换热系数随着风速的增加而显著增大。最后,基于试验数据建立了电加热平板构件的对流换热系数数学预测模型,并采用数值模拟验证了该模型的正确性。

The electric-heat method is the main cold-proof measure for polar ocean engineering equipment,with thermal balance being key to convective heat transfer.Taking an electric heading plate component as a research object,numerical simulations and model tests were carried out to analyze the influence of complex polar environmental factors on the thermal balance of electric heating of marine engineering equipment.Wind speed and temperature were considered as the main environmental parameters in this analysis;wind speed was varied over the range 0-40 m·s^(-1) and temperature over the range−40-0℃.Based on FLUENT software simulations and model tests,the convective heat transfer coefficients of the electrical heating plate component under different wind speeds and temperatures were obtained.The results showed that increasing wind speed and decreasing temperature could increase the convective heat transfer coefficient of the plate component.Temperature had little effect on the heat transfer of the plate when the wind speed was stable.In contrast,the convective heat transfer coefficient of the plate increased significantly with increasing wind speed at a given temperature.A mathematical prediction model for the convective heat transfer coefficient of the electrical heating plate component was established based on these experimental data,and the validity of the model was verified by numerical simulation.