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#1
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Heat transfer in near space enviroment?
I'm working on modeling the heat transfer of a small payload (approx
10" cube) covered in extruded polystyrene at high altitude (80k-100k ft). One thing I'm having trouble with is approximating the radiation flux reflected back from the earth (around mid-day) to the payload, which I'm approximating as fully incident on the bottom, and 50% on the sides. I'm also assuming the polystyrene has a emissivity of 0.9. With the exception of sunlight (fully incident on the top of the payload), can I model the rest of the "sky" at 0K? On a side note, I've looked at putting reflective materials inside the payload, but I'm trying to prevent possible signal degradation with a GPS reciever inside. Any insight is greatly appreciated! Dave |
#2
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Heat transfer in near space enviroment?
With the exception of sunlight (fully incident on the top of the
payload), can I model the rest of the "sky" at 0K? 2.7K surely! |
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