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Low gravity reorientation in a scale-model Centaur liquid-hydrogen tankAn experiment was conducted to investigate the process of liquid reorientation from one end of a scale-model Centaur liquid-hydrogen tank to the other end by means of low-level accelerations. Prior to reorientation, the liquid was stabilized at the top of the tank at a Bond number of 15. Tanks both with and without ring baffles and with tank radii of 5.5 and 7.0 centimeters were used in the study. Reorientation acceleration values were varied to obtain Bond numbers of 200 and 450. Liquid fill levels of 20 and 70 percent were used. From the data in this study, relations were developed to estimate reorientation event times in unbaffled tanks through the point of final liquid clearing from the top of the tank. The insertion of ring baffles drastically changed the reorientation flow profiles but resulted in only minor differences in the times of tank-top uncovering and liquid collection.
Document ID
19730007525
Document Type
Other - NASA Technical Note (TN)
Authors
Salzman, J. A. (NASA Lewis Research Center Cleveland, OH, United States)
Masica, W. J. (NASA Lewis Research Center Cleveland, OH, United States)
Lacovic, R. F. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
February 1, 1973
Subject Category
FLUID MECHANICS
Report/Patent Number
E-7098
NASA-TN-D-7168
Funding Number(s)
PROJECT: RTOP 909-72
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19730007525.pdf STI