
#1
Jan2113, 10:40 PM

P: 38

I wanted to figure out the temperature(t_{2}) of any object based on things such as its specific heat capacity, reentry speed, etc.
Work: W = Fy Force by Air: F_{D} = 1/2pv^{2}C_{D}A Energytemperature relationship: Q = mc(t_{2}  t_{1}) Setting things equal & solving for t_{2} gives: t_{2} = (1/2pv^{2}C_{D}Ay+mct_{1}) / mc (I'm sorry I could not get latex to format all of the formulas correctly so I formatted none of them...) So, how accurate is this equation in describing temperature gain through freefall back down to earth? 



#2
Jan2113, 11:59 PM

P: 102

I'm going to take a guess and say you get an estimate by finding the dynamic pressure (q = 0.5 * density * velocity^2) and solving for the adiabatic heating due to the pressure rise. This doesn't take any skin friction into account however.



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