MATHEMATICAL RELATIONS AND NUMERICAL TABLES FOR THE GEOMETRICAL ASPECTS OF DIFFUSION PROPAGATION IN ENCLOSED CHAMBERS

摘要

This report presents relations for determining the timevarying, average temperature which results from the diffusion of heat to the walls of a gas-filled enclosure. At infrasonic frequencies, the average temperature is the basic quantity that determines the relationship between dynamic volume and pressure changes. Sinusoidal and step changes are emphasized, and extensive, five-figure, tabulated data are given for the sphere, the infinite narrow box, and a wide range of finite cylinders. (Author)