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Physics Based Model for Cryogenic Chilldown and Loading. Part I: AlgorithmWe report the progress in the development of the physics based model for cryogenic chilldown and loading. The chilldown and loading is model as fully separated non-equilibrium two-phase flow of cryogenic fluid thermally coupled to the pipe walls. The solution follow closely nearly-implicit and semi-implicit algorithms developed for autonomous control of thermal-hydraulic systems developed by Idaho National Laboratory. A special attention is paid to the treatment of instabilities. The model is applied to the analysis of chilldown in rapid loading system developed at NASA-Kennedy Space Center. The nontrivial characteristic feature of the analyzed chilldown regime is its active control by dump valves. The numerical predictions are in reasonable agreement with the experimental time traces. The obtained results pave the way to the development of autonomous loading operation on the ground and space.

Document ID
20150000836
Acquisition Source
Ames Research Center
Document Type
Technical Publication (TP)
Authors
Luchinsky, Dmitry G. (Stinger Ghaffarian Technologies, Inc. (SGT, Inc.) Moffett Field, CA, United States)
Smelyanskiy, Vadim N. (NASA Ames Research Center Moffett Field, CA United States)
Brown, Barbara (NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
January 29, 2015
Publication Date
February 1, 2014
Subject Category
Fluid Mechanics And Thermodynamics
Numerical Analysis
Report/Patent Number
NASA/TP-2014-216659
ARC-E-DAA-TN13142
Report Number: NASA/TP-2014-216659
Report Number: ARC-E-DAA-TN13142
Funding Number(s)
CONTRACT_GRANT: NNA08CG83C
TASK: 5000105.10001.110.43.105
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
heat transfer
two-phase flow w
cryogenic cooling

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