Mass Transfer From a Rotating Cone in Axisymmetric Flow

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Abstract
The mass-transfer by sublimation from the surface of a stationary or rotating naphthalene cone oriented axisymmetrically in an airstream is experimentally investigated. The cone employed has a 30-deg total included angle and is five in. long. Air velocities ranged up to about 50 ft/sec whereas the ratio of the tangential velocity of the conical surface (at its base) to the mainstream speed ranged up to about 7.2; for the stationary cone air speeds up to about 100 ft/sec were employed. Local mass-transfer rates are determined by measuring the depth of the sublimed naphthalene. Results are correlated in dimensionless form using either the distance along the surface and the local velocity or the spiral length and resultant velocity. The flow pattern about the stationary and rotating cone is photographed using the smoke-filament technique.

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