Numerical and Experimental Modeling of Natural Convection for a Cryogenic Prototype of a Titan Montgolfiere
Abstract
Natural convection in a spherical geometry is considered for prediction of the buoyancy characteristics of one meter diameter single- and double-walled balloons in a cryogenic environment. The steady-state flow characteristics obtained by solving the Reynolds-Averaged Navier Stokes equations (RANS) with a standard k-ε model are used to determine the balloon performance in terms of net buoyancy as a function of heat input. Thermal radiation effects on the overall balloon performance are also investigated. The results obtained compared favorably with the corresponding cryogenic experiments conducted at the same scale in a cryogenic facility. In addition, both numerical and experimental results were compared with engineering heat transfer correlations used in system-level models of the Titan Montgolfiere. Finally, we examine scaling issues for the full-scale Titan Montgolfieres.
Additional Information
© 2011 by the American Institute of Aeronautics and Astronautics, Inc. Published Online: 4 Jun 2012. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. The help and support of the engineering and technical staff of Wyle Labs in El Segundo and their cryogenic chamber facility during the experiment is greatly acknowledged.Attached Files
Submitted - FeldmanSamantaColoniusEtAl2011.pdf
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Additional details
- Eprint ID
- 97201
- Resolver ID
- CaltechAUTHORS:20190717-102319028
- JPL/Caltech/NASA
- Created
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2019-07-18Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2011-6869