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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v29.i2.10
11 pages

Cryogenic Fuel Tanks Pressure Reduction a Low-G Fluid Mixing Experiment

Jihad M. Albayyari
Associate Professor of Mechanical Engineering Technology Eastern Michigan University, 118 Sill Hall, Ypsilanti, MI 48197, USA

RESUMO

"Reduced-Fill Tank The Pressure Control Experiment (TPCE/RF)" is a space experiment developed to meet the need for a critical aspect of cryogenic fluid management technology: "control of storage tank pressures in the absence of gravity by forced-convection mixing". The experiment used Freon-113, at near saturation conditions and a constant 40 % fill level, to simulate the fluid dynamics and thermodynamics of cryogenic fluids in space applications. The objectives of TPCE/RF were: to characterize the fluid dynamics of an axial jet-induced mixing in low gravity, to evaluate the validity of empirical mixing models, and to provide data for use in developing and validating computational fluid dynamics model of mixing processes. TPCE/RF accomplished all of its objectives in the Space Shuttle flight in May 1996. The flow patterns observed generally agreed with a prior correlation derived from drop tower tests. Several existing mixing correlations were found to provide reasonable performance predictions. Low-energy mixing jets, dissipating on the order of 1 % of the kinetic energy of previous mixer designs, were found to be effective and reliable at reducing thermal non-uniformities. Those jets promote heat and mass active mixing, whether continuous or periodic. The mentioned factors offer increased reliability and predictability in space cryogenic systems and can be accomplished with no significant boiloff penalty caused by kinetic energy dissipation.


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