Hello,
Not sure if this is exactly the right sub for this question, but I haven't been able to find any info on it online so I figured I have to ask.
A little background: For my senior design project I'm designing a physical demo for radiative heat transfer. It's pretty simple, just a 250W heat lamp pointed at some felt with a thermal couple to measure the temp. Different colored felt for different ε values to demonstrate how that effects total heat transfer.
The problem I'm running into is how to analyze the lightbulb, specifically how to calculate the blackbody emissive power. Usually it's done using E_b = σT^4, however that doesn't seem to quite work, because I either use T_glass at the edge of the lightbulb, which seems like it misses something, or T_filament, which gives me an absolutely disgusting view factor which I can't work with. AI tells me that I can use Power*efficiency/area to get an E_b value, and while this does get me to the correct units, I'd want to confirm with a real person before going ahead with that method. It's been a year since I took heat transfer so forgive me if there's an easy solution to this that I'm just missing.
Any help is greatly appreciated as the professor I'm doing this for won't respond to my emails! She's truly preparing me for the professional world of engineering :)