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Mathematical modeling and analysis of heat pipe start-up from the frozen stateThe start-up process of a frozen heat pipe is described and a complete mathematical model for the start-up of the frozen heat pipe is developed based on the existing experimental data, which is simplified and solved numerically. The two-dimensional transient model for the wall and wick is coupled with the one-dimensional transient model for the vapor flow when vaporization and condensation occur at the interface. A parametric study is performed to examine the effect of the boundary specification at the surface of the outer wall on the successful start-up from the frozen state. For successful start-up, the boundary specification at the outer wall surface must melt the working substance in the condenser before dry-out takes place in the evaporator.
Document ID
19900061349
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jang, J. H.
(NASA Lewis Research Center Cleveland, OH, United States)
Faghri, A.
(Wright State University Dayton, OH, United States)
Chang, W. S.
(NASA Lewis Research Center Cleveland, OH, United States)
Mahefkey, E. T.
(USAF, Wright Research and Development Center Wright-Patterson AFB, OH, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1990
Publication Information
Publication: ASME, Transactions, Journal of Heat Transfer
Volume: 112
ISSN: 0022-1481
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
90A48404
Funding Number(s)
CONTRACT_GRANT: F33615-88-C-2820
Distribution Limits
Public
Copyright
Other

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