Two-dimensional simulation of a two-phase, regenerative pumped radiator loop utilizing direct contact heat transfer with phase changeAn innovative pumped loop concept for 600 K space power system radiators utilizing direct contact heat transfer, which facilitates repeated startup/shutdown of the power system without complex and time-consuming coolant thawing during power startup, is under development. The heat transfer process with melting/freezing of Li in an NaK flow was studied through two-dimensional time-dependent numerical simulations to characterize and predict the Li/NaK radiator performance during startup (thawing) and shutdown (cold-trapping). Effects of system parameters and the criteria for the plugging domain are presented together with temperature distribution patterns in solid Li and subsequent melting surface profile variations in time.
Document ID
19910053503
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rhee, Hyop S. (Space Power, Inc. San Jose, CA, United States)
Begg, Lester L. (Space Power, Inc. San Jose, CA, United States)
Wetch, Joseph R. (Space Power, Inc. San Jose, CA, United States)
Jang, Jong H. (Space Power, Inc. San Jose, CA, United States)
Juhasz, Albert J. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Fluid Mechanics And Heat Transfer
Meeting Information
Meeting: Intersociety Energy Conversion Engineering Conference