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摘要针对不同军用伪装材料，保留其主要的外形和材料属性，建立不同的三文模型，得出其对伪装表面的流场和温度场的影响。选择能达到相同影响效果的多孔介质模型，实现伪装材料到多孔介质模型的简化。分别模拟自然条件和外加伪装简化模型条件下，室外平房和周围环境的温度，对比分析白天和夜间的伪装效果。结果表明，不同的伪装模型适合不同的外部环境条件。三种伪装材料通过改变其表面温度和周围流场起到伪装效果，在裸沙地条件下，1号模型强化对流，适合夜间伪装，2号模型弱化散热，适合雨林伪装，3号模型同时有以上两种影响，适合白天伪装。30221
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关键词 红外辐射 多孔介质 伪装遮障 伪装效果
毕业论文设计说明书外文摘要
Title The Effect Analysis of different models of camouflage screens
Abstract
Regarding to different models of military camouflage material, we retains its main shape and material properties, and establish different three-dimensional models, then we conclude that its effect on the camouflage surface flow field and temperature field. We simplify the porous media model which can achieve the same effect of military camouflage material. We simulate the temperature of outdoor bungalows and the ambient under natural conditions and the situation added camouflage simplified model respectively, and then analyzed camouflage effect in day and night. The results show that different models are suitable for different camouflage external environmental conditions. Three kinds of camouflage materials can rise to camouflage effect by changing the surface temperature and the flow field around. Under the condition of the bare sandy, the first model that is strengthen the convection is suitable for camouflage at night, and the second model that is weaken the cooling is suitable for forest camouflage, finally，the third model that have two kinds of effects of the above is designed and it is suitable for camouflage during the day.
Keywords infrared radiation porous media camouflage screen
camouflage effect
目 次
1. 引言 1
1.1 应用背景 1
1.2 红外伪装的研究现状 2
1.2.1 目标表面辐射温度的分析与计算 2
1.2.2 关于伪装模型建立的研究 2
1.2.1 伪装效果的模拟和分析的研究 2
1.3 本文的主要工作内容 3
2. 伪装模型的简化 5
2.1伪装材料局部特性分析模型 5
2.1.1 几何模型的建立 5
2.1.2 计算模型的建立 7
2.1.3 计算结果分析 10
2.2多孔介质简化模型的确立 12
2.2.1 几何模型的建立 12
2.2.1 计算模型的建立 13
2.2.2 计算结果分析 14
3. 实际伪装效果分析模型 16
3.1 几何模型的建立 16
3.2 计算模型的建立 16
3.3 伪装效果分析 18
3.3.1 对照模型模拟结果 18