Exploratory Studies on the Sublimation of Slender Camphor and Naphthalene Models in a Supersonic Wind-Tunnel

by Andrew F. Charwat

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A summary of a systematic study of the sintering of powdered camphor and naphthalene after deaeration under vacuum. It is shown that models machined out of stock prepared in this way have a shear strength twice that of cast models, are completely homogeneous, and are well suited to wind-tunnel experiments on the aerodynamics of sublimating bodies. Exploratory tests on cones with flat and hemispherical noses and on several complex conical shapes featuring downstream and upstream facing steps, rectangular grooves, and shoulders are described. Emphasis is on the general evolution of their profiles, the sublimation history of the tips, and the occurrence of grooves, striations, and surface markings.

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