WelshEngineer87
Automotive
- Dec 20, 2017
- 11
Hi all,
I want to calculate the total hemispherical emissivity of a surface when the emissivity curve changes with wavelength (assume spectral emissivity does not change with temperature)
I have seen examples in text books that show how to calculate emittance by integration on simple square wave profiles but how is this calculated if you have a wavy profile as the below image? The equation attached is used to calculate total hemispherical emissivity at different temperatures, i'm not sure how?
How can you calculate the change in total hemispherical emissivity with temperature changes? This would be related to changes in emissivity at different wavelengths due to temperature.
I want to calculate the total hemispherical emissivity of a surface when the emissivity curve changes with wavelength (assume spectral emissivity does not change with temperature)
I have seen examples in text books that show how to calculate emittance by integration on simple square wave profiles but how is this calculated if you have a wavy profile as the below image? The equation attached is used to calculate total hemispherical emissivity at different temperatures, i'm not sure how?
How can you calculate the change in total hemispherical emissivity with temperature changes? This would be related to changes in emissivity at different wavelengths due to temperature.

