摘要耐高温涂层作为热防护层广泛应用于工业当中,经常使用的是氧化锆和氧化铝材料，而这些材料对热辐射来说是半透明的。在高温环境下对这种涂层的研究是很有必要的，因为它不仅增加了工业设备的使用性能，同时也提高了工艺制造水平。任务是建立基本的物理模型，基本结构的组成是金属基底与半透明涂层，涂层在金属基底的上侧，高温加热金属基底。通过使用分波段的研究方法和双热流法对半透明涂层内部的辐射、导热复合换热进行数值分析，得到涂层内部的温度分布，然后研究了半透明涂层表面的发射特性。本文的分析方法不仅将复杂的物理模型简化，同时也揭示辐射特性的一些普遍规律。64355

毕业论文关键词  辐射特性  半透明  高温   辐射传输

毕业设计说明书（论文）外文摘要

Title    The radiative properties of  coatings in the high temperatures environment                             

Abstract The high-temperature translucent thermal barrier coatings(TBCs)have been widely used in industry. The material of zirconia and alumina are used frequently in the high temperatures environment,and these coatings are translucent in thermal  radiation.It’s very necessary to make the research on these coatings,because it improves equipment  Performance and manufacturing level.The task is to Establish the basic physical model which contains Translucent coating and metallic substrate. Now let us consider the metallic substrate heated up at the external surface and attached on the other side to the semitransparent ceramic coating. The coupled  radiation and conduction heat transfer in the coating were numerically computed by the Two-Flux theory and the theory which the wavelength has been pided into M windows to obtain the temperature distributions inside the coating．The directional and spectral emittance of the coating surface were studied in assumption of the specular surface．The theoretical method makes the complex physical model easier and reveals some universal law of radiative properties.

Keywords  radiative properties   translucent   high-temperature  radiation transfer

1  引言（或绪论） 1

1．1  研究背景及意义 1

1．2  一些基本的定义 2

1．3  国内外研究现状 2

1.3.1  耐高温涂层导热辐射耦合传热研究 2

1.3.2  耐高温涂层表面发射率的研究 3

1．4  本文的工作任务 3

2  物理模型与控制方程 4

2．1  物理模型 4

2. 2 半透明涂层的辐射传输方程 4

2．3  换热边界条件和辐射换热特性 6

2．4  温度分布的推导简化及求解 8

2．5  半透明涂层表面发射率的推导 10

3  计算机VB编程模拟运算 11

3．1  模型初始条件 11

3．2  界面设计 12

3．3  数值模拟结果 13

4  温度分布的数值模拟与分析 15

4．1  涂层的热导率对温度分布的影响