## FLUENT雪天及自然结霜条件下物体表面温度场分析

Title    Temperature analysis of object surface in condition of Snowy day or frosty day
Abstract
In this paper, using the basic principle of heat transfer, physical and mathematical model is established, through the finite element heat transfer analysis of FLUENT software platform, analyzes the snow and natural frost surface temperature field under the change in the weather and their distribution rule. Beijing climate conditions and steel plate in January, for example, set up the real snow covered frost two-dimensional heat transfer model of steel plate, the comprehensive consideration of background radiation, air temperature, solar radiation, ground temperature, wind speed and other factors, the numerical simulation for the temperature variation curves on the surface of the steel plate and the model of temperature distribution in the cloud, for the further melting frost provides the necessary theoretical basis and the reference data.

Keywords:  The surface temperature field , Snowy day ,  Frosty day , Heat transfer analysis

1  绪  论    1
1.1  课题研究背景    1
1.2  国内外研究现状    1
1.2.1  雪晶研究历程及现状    1
1.2.2  霜研究历程及现状    2
1.2.3. 降雪结霜物体表面温度特性分析    2
1.3  课题研究意义及主要内容    3
2  雪天结霜天气特征及雪霜物理和热物性特征    4
2.1  雪天霜天天气特征    4
2.2  雪和霜的物理及热物性特征    5
2.3  本章小结    7
3  表面温度场计算模型    8
3.1  模型的建立    8
3.1.1  物理模型及网格划分    8
3.1.2  边界条件的设置    9
3.2  物性参数的选取    10
3.3  本章小结    11
4  雪天或结霜天气情况下钢板表面温度场的数值模拟结果    12
4.1  一天24小时的气温变化及土壤温度变化    12
4.2  对流换热系数    14
4.3  雪天钢板表面温度场的数值模拟结果    15
4.4  结霜天钢板表面温度场的数值模拟结果    17
4.5  表面覆雪与覆霜的对比    19
4.4  本章小结    20

1  绪  论
1.1  课题研究背景

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