steady two-phase flow in a reduced gravity environment portland state university microgravity team...
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![Page 1: Steady Two-Phase Flow in a Reduced Gravity Environment Portland State University Microgravity Team Albert Sitorus, Michael Bacich, Michael Severson, Jamie](https://reader036.vdocuments.net/reader036/viewer/2022062407/56649d6a5503460f94a47de3/html5/thumbnails/1.jpg)
Steady Two-Phase Flow in a Reduced Gravity Environment
Portland State University Microgravity TeamAlbert Sitorus, Michael Bacich, Michael Severson, Jamie Kelso, and Megan Sala
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NASA’s Reduced Gravity Student Flight Opportunities Program
Spring 2002: Notification of Program Summer 2002: Development of 1g test, BenchmarkingOct. 2002: Proposal to NASADec. 2002: Acceptance into the ProgramJan. 2003: TEDP DeadlineMarch 2003: Trip to Johnson Space CenterPresent: Analysis of Results
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ApplicationsApplications
• Thermal control systems
• Power cycles• Storage of fuels,
propellants and cryogens
• Life support systems• Waste water
treatment and recycling
• Fluids management
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Flow Regimes
Bubbly Slug Annular
http://microgravity.grc.nasa.gov/6712/2phase_flow/2phase.html
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Slug Flow
Points of Interest:
• Steady-State Velocities • Deposition Rates• Slug Volumes
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Behavior in Reduced Gravity
http://microgravity.grc.nasa.gov/school/gallery.htm
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Previous Two Phase Experiments
Rousset B. Two-phase visualization at cryogenic temperature, 2000
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Closed Circuit Loop
Terrestrial Design•Simple•Affordable•Small•Achieve Steady-State
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Benchmarking
Dimensionless Film Thickness vs. Capillary Number
0
0.5
1
1.5
2
2.5
3
0 0.5 1 1.5 2 2.5 3 3.5 4
Ca (x 10-3)
d /r
(x 1
0-2
)
Closed Circuit LoopChenBretherton
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Reduced Gravity Apparatus
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Test Equipment Data Package (TEDP)
• Strict Safety Requirements– Structural Analysis
• 9g Forward• 6g Downward • Impact
– Hazard Analysis– Electrical Analysis– Size and Weight
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Test FacilityTest Facility
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Flight Pattern
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Reduced Gravity Flights
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Reduced Gravity Experiment
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Reduced Gravity Conclusions
-Achieved Steady State
-Design passed Test Readiness Review
-Withstood loading conditions
-Operated successfully
-Experiment size
-Camera Resolution
-Motors and Controllers
Design Changes
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Special Recognition
• NASA’s Reduced Gravity Student Opportunity Program
• The Oregon Space Grant Program • Mark Weislogel • Portland State University’s College of
Engineering and Computer Science• FMC Allen Machinery • Chehalem Machine Works• Infinity Images