RESEARCH PAPERS: Heat Transfer in Manufacturing

Yield Limits of Plates at Extremely High Heat Flux

[+] Author and Article Information
J. H. Lienhard, D. S. Napolitano

W. M. Rohsenow Heat and Mass Transfer Laboratory, Department of Mechanical Engineering, Room 3-162, Massachusetts Institute of Technology, Cambridge, MA 02139-4307

J. Heat Transfer 120(1), 253-258 (Feb 01, 1998) (6 pages) doi:10.1115/1.2830050 History: Received April 11, 1997; Revised September 30, 1997; Online January 07, 2008


For heat fluxes ranging above 10 MW/m2 or so, solid surfaces usually experience large thermal stresses and degradation of mechanical properties. The resulting mechanical failure of such surfaces is a primary limitation to the design of thermal systems at extremely high heat flux. This investigation considers the elastic stresses in circular plates subjected to extremely high heat fluxes. A gaussian distributed heat load is applied to one surface of the plate and the heat flux at which yielding occurs is identified. Several candidate materials are examined, accounting for the temperature dependence of yield strength and other properties. The mechanical boundary conditions on the plate are varied. Figures of merit are given for the high flux performance of a number of materials.

Copyright © 1998 by The American Society of Mechanical Engineers
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