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Summary: Fusion Engineering and Design 42 (1998) 555561
Scaling criteria for IFE liquid wall protection scheme simulation
Alice Ying *, Mohamed Abdou
Mechanical and Aerospace Engineering Department, Uni6ersity of California, Los Angeles, CA 90095-1597, USA
Abstract
Applicability of experimental results to a full-size system depends on the scaling criteria on which the test
article/fluid medium is used. This paper presents a careful review and assessment of a number of key parameters
which influence fluid stability phenomena relevant to the IFE wall protection schemes, and provides guidance for
future simulation experiments. The analysis shows that the non-dimensional jet surface ripple size can be reproduced
by simultaneously preserving prototypical jet Reynolds and Weber numbers. The results show the difficulties of using
water as a simulant for liquid protectants in experiments for evaluating IFE thin and thick liquid wall protection
schemes. The analysis also shows that a modified HTS salt seems a good simulant for Flibe and that liquid sodium
a good simulant for liquid lead. However, in the absence of information on liquids other than water, serious questions
remain concerning the issue of scaling. Nevertheless, to best utilizing the available R&D resources, further
experiments should be performed using fluids with significantly lower vapor pressures, such as liquid metals or
low-melting temperature salts or eutectics. © 1998 Elsevier Science S.A. All rights reserved.
1. Introduction
Concerns about the feasibility of IFE liquid
wall protection schemes have stimulated research
in the thermal hydraulics of liquid protection
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