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NASA Lewis Steady-State Heat Pipe Code ArchitectureNASA Glenn Research Center (GRC) has developed the LERCHP code. The PC-based LERCHP code can be used to predict the steady-state performance of heat pipes, including the determination of operating temperature and operating limits which might be encountered under specified conditions. The code contains a vapor flow algorithm which incorporates vapor compressibility and axially varying heat input. For the liquid flow in the wick, Darcy s formula is employed. Thermal boundary conditions and geometric structures can be defined through an interactive input interface. A variety of fluid and material options as well as user defined options can be chosen for the working fluid, wick, and pipe materials. This report documents the current effort at GRC to update the LERCHP code for operating in a Microsoft Windows (Microsoft Corporation) environment. A detailed analysis of the model is presented. The programming architecture for the numerical calculations is explained and flowcharts of the key subroutines are given
Document ID
20130011407
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Mi, Ye (En'Urga, Inc. West Lafayette, IN, United States)
Tower, Leonard K. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 27, 2013
Publication Date
February 1, 2013
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
GRC-E-DAA-TN5572
NASA/TM-2013-216499
E-18634
Funding Number(s)
WBS: WBS 887359.04.05.03
CONTRACT_GRANT: NAS3-03064
Distribution Limits
Public
Copyright
Public Use Permitted.

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