高级传热：热辐射
掌握热辐射、电磁波和辐射特性：实际应用的综合指南
教程演示🔗
What you’ll learn 学习内容
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Classify electromagnetic radiation, and identify thermal radiation
对电磁辐射进行分类，并识别热辐射 -
Understand the idealized blackbody, and calculate the total and spectral blackbody emissive power
了解理想化黑体，并计算总黑体和光谱黑体发射功率 -
Calculate the fraction of radiation emitted in a specified wavelength band using the blackbody radiation functions
使用黑体辐射函数计算在指定波段发射的辐射比例 -
Understand the concept of radiation intensity, and define spectral directional quantities using intensity
了解辐射强度的概念，并使用强度定义光谱方向量 -
Develop a clear understanding of the properties emissivity, absorptivity, relflectivity, and transmissivity on spectral, directional, and total basis
在光谱、方向和总基础上清楚地了解发射率、吸收率、相对反射率和透射率等特性 -
Apply Kirchhoff’s law to determine the absorptivity of a surface when its emissivity is known
应用基尔霍夫定律来确定表面在发射率已知时的吸收率 -
Define view factor, and understand its importance in radiation heat transfer calculations
定义视系数，并了解其在辐射传热计算中的重要性 -
Develop view factor relations, and calculate the unknown view factors in an enclosure by using these relations
开发视因子关系，并使用这些关系计算机柜中的未知视因子 -
Calculate radiation heat transfer between black surfaces
计算黑色表面之间的辐射传热 -
Determine radiation heat transfer between diffuse and gray surfaces in an enclosure using the concept of radiosity
使用光能传递的概念确定外壳中漫反射表面和灰色表面之间的辐射传热 -
Quantify the effect of radiation shields on the reduction of radiation heat transfer between two surfaces
量化辐射屏蔽对减少两个表面之间辐射传热的影响
Requirements 要求
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Fundamentals of Heat Transfer Course
传热基础课程 -
Engineering Thermodynamics Course
工程热力学课程
Description 描述
Delve into Electromagnetic Waves, Thermal Radiation, and Radiative Properties: Comprehensive Insights and Real-World Applications
深入研究电磁波、热辐射和辐射特性：全面的见解和实际应用
In this course, we begin by examining electromagnetic waves and the electromagnetic spectrum, focusing on thermal radiation. We introduce the concept of the idealized blackbody, blackbody radiation, and blackbody radiation function, along with key principles such as the Stefan-Boltzmann law, Planck’s law, and Wien’s displacement law.
在本课程中，我们首先检查电磁波和电磁频谱，重点是热辐射。我们介绍了理想化黑体、黑体辐射和黑体辐射函数的概念，以及斯蒂芬-玻尔兹曼定律、普朗克定律和维恩位移定律等关键原理。
We explore the radiation emitted by every point on a plane surface in all directions into the hemisphere above the surface, and study the radiation intensity that describes the magnitude of radiation emitted or incident in specific directions. Key radiation fluxes like emissive power, irradiation, and radiosity are discussed in terms of intensity. The course also covers radiative properties of materials, including emissivity, absorptivity, reflectivity, and transmissivity, and their dependencies on wavelength, direction, and temperature. The greenhouse effect serves as an example of the consequences of wavelength-dependent radiation properties.
我们探索平面上每个点在各个方向上发射到表面上方半球的辐射，并研究描述在特定方向上发射或入射的辐射大小的辐射强度。从强度的角度讨论了发射功率、辐照度和辐射度等关键辐射通量。该课程还涵盖了材料的辐射特性，包括发射率、吸收率、反射率和透射率，以及它们对波长、方向和温度的依赖性。温室效应是波长依赖性辐射特性后果的一个例子。
The course further delves into view factors and their associated rules, providing view factor expressions and charts for common configurations and introducing the crossed-strings method. We discuss radiation heat transfer between black surfaces and nonblack surfaces using the radiation network approach. Finally, we examine radiation shields and their effects on radiation.
本课程进一步深入研究了视图因子及其相关规则，提供了常见配置的视图因子表达式和图表，并介绍了交叉字符串方法。我们使用辐射网络方法讨论了黑色表面和非黑色表面之间的辐射传热。最后，我们研究了辐射屏蔽及其对辐射的影响。
Throughout the course, you will gain a comprehensive understanding of electromagnetic waves, thermal radiation, and radiative properties, preparing you to apply these concepts in real-world scenarios. Enroll now to enhance your knowledge of radiation and its implications in various applications
在整个课程中，您将全面了解电磁波、热辐射和辐射特性，为您在实际场景中应用这些概念做好准备。立即注册，以增强您对辐射及其在各种应用中的影响的了解
Who this course is for:
本课程适用于谁：
- Engineering Students 工科学生
