Table 4 Chilldown efficiencies and mass flow rates for the six flight cases.

From: Cryogenic spray quenching of simulated propellant tank wall using coating and flow pulsing in microgravity

 

Reduced-G

Ground-G

Case

Teflon coated

Bare SS304

Mass flow rate, kg/s

Teflon coated

SS304

1 (micro-g) 80 psig, continuous flow

18.54%

13.38%

0.0253

23.19%

19.54%

2 (micro-g) 80 psig 40% DC, 1 s Period

28.50%

21.26%

0.0350

28.49%

21.74%

3 (micro-g) 80 psig 70% DC, 1 s Period

23.48%

13.65%

0.0239

21.17%

17.78%

4 (micro-g) 60 psig, continuous flow

28.40%

17.83%

0.0100

24.50%

18.58%

5 (micro-g) 90 psig, continuous flow

16.87%*

12.96%*

0.0264*

17.26%

14.32%

6 (micro-g) 90 psig 50% DC, 1 s Period

23.88%*

18.63%*

0.0255*

20.52%

16.76%

Back to article page