To properly design condensers, crucial parts of two-phase heat transport systems envisaged for future large spacecraft, one uses experimental data obtained from ground testing, and reduced gravity aircraft and rocket flight testing, plus results of thermal modeling and scaling calculations. Since the flow patterns along the condensation traject differ in the two situations, it is better to theoretically and experimentally investigate the impact of gravity on condensation, for an identical flow pattern, namely annular-wavy-mist, reported to exist along almost the entire condensation length (for vapor qualities ranging from close to 1 down to the value 0.13), both in low-gravity environment and in vertical downflow in a gravity field.
Two-Phase Flow and Heat Transfer in Various Gravity Environments
1994
16 pages
Report
Keine Angabe
Englisch
Rocket Propellants , Rocket Engines & Motors , Manned Spacecraft , Spacecraft radiators , Two phase flow , Flow distribution , Heat transfer , Reduced gravity , Duct geometry , Condensers(Liquefiers) , Working fluids , Pressure drop , Temperature control , Ducts , Thermodynamics properties , Ammonia , Mathematical models , Earth gravitation , Foreign technology
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