摘要简要阐述了装甲车辆红外隐身的重要性，介绍了红外隐身机理，综合各种影响装甲车辆与背景红外辐射的因素，针对装甲车辆的外表面红外辐射，将其简化为平板，通过使用FLUENT软件模拟出平板在自然条件下的温度场变化。65969

简要介绍了FLUENT软件，说明了使用到的计算模型，简要过程及边界条件;模拟并分析了平板在一年不同季节红外辐射，并对平板上的两点在某一具体日期进行全天的模拟；分析及比较了不同颜色涂层对于平板红外辐射的影响，从而得出较为适合的装甲车辆涂层。还比较了相同涂层相同外界环境下与地面有倾斜角度和不同厚度平板的温度场变化。

毕业论文关键词  装甲车辆  红外隐身  平板  自然条件  FLUENT  涂层  温度场

毕业设计论文外文摘要

Title   Numerical Simulation of Temperature Field of Plate  with Various Coatings in Nature Conditions                                                  

Abstract

The importance and principle of infrared stealth of armored vehicles are briefly introduced. A armored vehicle can be simplified into a plate to analyze the infrared radiation of its outer surface with various factors that affects the panzer’s infrared radiation and the radiation from the environment taken into consideration. The plate’s temperature field transformation in natural conditions is simulated using FLUENT.

The FLUENT software is also briefly introduced. The calculation models, processes and boundary conditions involved are described. Infrared radiation of the whole plate in different seasons and of two different points on the plate in a certain day are mainly studied. A conclusion about the fittest coating of a panzer is drawn by analyzing and comparing the infrared radiation of plates with different coatings. The comparison of plates with various angles of tilt and different thickness in same environmental conditions and same coating is also made.

Keywords  armored vehicles  infrared stealth  plate  natural conditions

FLUENT  coating   temperature field 

目  次

1  绪论 1

1.1  课题研究的背景与意义 1

1.2  红外隐身机理 1

1.3  红外隐身技术的现状 2

1.4  装甲车辆的红外隐身技术 2

1.5  主要研究内容 4

2  平板温度场模拟的理论基础和研究方法 4

2.1  辐射换热 4

2.2  对流换热 6

2.3  导热 6

3  平板温度场仿真数值方法 8

3.1  控制方程 8

3.2  控制方程的离散化 10

4  FLUENT软件的使用 12

4.1  FLUENT软件简介 12

4.2  建立模型 14

4.3  设置计算模型 15

4.4  设置材料参数 16

4.5  设置边界条件 16

4.6  设置监控点