Previous work relating to two-phase flow in manifolds has dealt primarily with 1-g phase distribution at each junction. Understanding the redistribution of gas and liquid at each junction in microgravity allows the investigator to calculate specific thermal-hydraulic phenomena in each branch or run. A model was developed at Texas A&M to determine the phasic distribution in an arbitrary manifold. Previously developed phase distribution equations are used to describe the redistribution at a dividing T-junction (Young et al., 1999). Mass flow rate, void fraction, and pressure drop are calculated iteratively for the entire manifold. Output from the model was compared to data taken from tests aboard NASA’s KC-135. The test manifold consisted of a run with three branches. The system allowed the output to be directed to a phase separator or to collection bags. The distribution of liquid and gas in each collection bag could be used to determine the mass fraction in each branch and run. Results show good agreement between predicted mass fraction and flight data.
Modeling and testing of two-phase flow in manifolds under microgravity conditions
Space Technology and Applications International Forum - 2001 ; 2001 ; Albuquerque, New Mexico
AIP Conference Proceedings ; 552 , 1 ; 241-246
2001-02-02
6 pages
Conference paper
Electronic Resource
English
Modeling and Testing of Two-Phase Flow in Manifolds Under Microgravity Conditions
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