Vaporization of JP-8 Jet Fuel in a Simulated Aircraft Fuel Tank ...

For the 30,000’ altitude data, the chamber was therefore initially cooled so that the initial
fuel temperature was about 40°F while the maximum liquid temperature was kept below
approximately 60°F to reduce the fuel vapor pressure so that the ullage vapor
concentrations remained within the calibration range.
Temperature, Deg. F.
140
120
100
80
60
40
20
0
Thermocouple
Error
0 1000 2000 3000 4000
Time, seconds
FID Error
Liquid Temp
Measured THC
Calculated THC, 115 FP
Calculated THC, 120 FP
Figure 5.10. Fuel heating at 10,000’ altitude, 10.2 psia; input fuel temperature and comparison of
calculated and measured ullage vapor concentrations, M.L.=31.5kg/m 3 .
Temperature, Deg. F.
120
100
80
60
40
20
0
Thermocouple
Error
FID Error
Liquid Temp
Measured THC
Calculated THC, 115 FP
Calculated THC, 120 FP
0 1000 2000 3000 4000
Time, seconds
Figure 5.11. Fuel heating at 20,000’ altitude, 6.9 psia; input fuel temperature and comparison of
calculated and measured ullage vapor concentrations, M.L.=31.5kg/m 3 .
4
3.5
3
2.5
2
1.5
1
0.5
0
5
4
3
2
1
0
% Propane Equivalent
% Propane Equivalent
41