naca-tn-4141
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National Advisory Committee for Aeronautics, Technical Notes - The Useful Heat Capacity of Several Materials for Ballistic Nose-Cone Construction
An analysis has been made of the heat-absorption characteristics of
several materials which might be considered for construction of ballistic
missile heat sinks. The numerical analysis, which took into account the
variation of material properties with temperature, was made for conditions
corresponding to a typical ballistic-missile trajectory.
Four materials, each characteristic of a group of materials, were
considered - copper, Inconel-X, graphite, and beryllium.
It was found that significant weight saving could be achieved by the
use of graphite or beryllium in place of copper. Inconel-X was found to
be unsatisfactory because of its low thermal conductivity.
It is indicated that large errors in computed temperature distribu-
tions in materials can arise if the Fourier heat-conduction equation is
approximated in the conventional fashion.
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