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Tank Pressure Control Experiment: Thermal Phenomena in Microgravity. Video 4 of 4The report presents the results of the flight experiment Tank Pressure Control Experiment/Thermal Phenomena (TPCE/TP) performed in the microgravity environment of the space shuttle. TPCE/TP, flown on the Space Transportation System STS-52, was a second flight of the Tank Pressure Control Experiment (TPCE). The experiment used Freon 113 at near saturation conditions. The test tank was filled with liquid to about 83 percent by volume. The experiment consisted of 21 tests. Each test generally started with a heating phase to increase the tank pressure and to develop temperature stratification in the fluid, followed by a fluid mixing phase for the tank pressure reduction and fluid temperature equilibration. The heating phase provided pool boiling data from large (relative to bubble sizes) heating surfaces (0.1046 m by 0.0742 m) at low heat fluxes (0.23 to 1.16 kW/m(exp 2)). The system pressure and the bulk liquid subcooling varied from 39 to 78 kPa and 1 to 3 deg C, respectively. The boiling process during the entire heating period, as well a jet-induced mixing process for the first 2 min. of the mixing period, was also recorded on video. Analyses of data from the two flight experiments (TPCE and TPCE/TP) and their comparison with the results obtained in drop tower experiments suggest that as Bond number approaches zero the flow pattern produced by an axial jet and the mixing time can be predicted by the Weber number. This is video 4 of 4.
Document ID
19970005013
Acquisition Source
Johnson Space Center
Document Type
Video
External Source(s)
Date Acquired
August 17, 2013
Publication Date
February 20, 1996
Subject Category
Materials Processing
Report/Patent Number
NAS 1.60:3564/Videotape 4 of 4
W/O-472411-Tape-4 of 4
NASA-TP-3564/Videotape 4 of 4
NONP-NASA-VT-97-1997005940
Accession Number
97N13000
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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