Thermal radiation characteristics of nonisothermal cylindrical enclosures using a numerical ray tracing technique
Thermal radiation characteristics of nonisothermal cylindrical enclosures using a numerical ray tracing technique
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使用数值射线追踪技术研究非等温圆柱形外壳的热辐射特性
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
Joseph F. Baumeister
中科院分区：
文献类型：
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作者：
Joseph F. Baumeister
由于腔内光能传递和辐射不均匀，对简单或复杂腔设计发射的能量进行分析可能会导致复杂的解决方案。应用数值射线追踪技术来模拟各种腔体设计内和来自各种腔体设计的辐射传播。为了获得等温和非等温腔表面与空间之间的能量平衡关系，利用计算机代码 NEVADA 将其统计技术应用于数值射线追踪。通过将结果与已知的理论和极限解以及电阻网络方法进行比较，验证了分析方法。一般来说，对于非等温腔体，其性能（表观发射率）是圆柱体长径比、表面发射率和圆柱体表面温度的函数。圆柱形腔体中非等温条件的程度显着影响腔体的整体性能。结果显示了广泛的参数变量，可用作可能的设计参考。
Analysis of energy emitted from simple or complex cavity designs can lead to intricate solutions due to nonuniform radiosity and irradiation within a cavity. A numerical ray tracing technique was applied to simulate radiation propagating within and from various cavity designs. To obtain the energy balance relationships between isothermal and nonisothermal cavity surfaces and space, the computer code NEVADA was utilized for its statistical technique applied to numerical ray tracing. The analysis method was validated by comparing results with known theoretical and limiting solutions, and the electrical resistance network method. In general, for nonisothermal cavities the performance (apparent emissivity) is a function of cylinder length-to-diameter ratio, surface emissivity, and cylinder surface temperatures. The extent of nonisothermal conditions in a cylindrical cavity significantly affects the overall cavity performance. Results are presented over a wide range of parametric variables for use as a possible design reference.