ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
MEASUREMENTS OF THE TURBULENT ENERGY AND TEMPERATURE BALANCES IN AN AXISYMMETRIC BUOYANT PLUME IN A STABLY STRATIFIED ENVIRONMENT
Abstrakt
Measurements of temperature and velocity were taken in an axisymmetric turbulent hot air plume in a stably stratified environment using hot-wire anemometers. Profiles of the first four moments including Reynolds stress and turbulent heat fluxes are presented. The measurements are shown to satisfy the constraints imposed by the mean momentum and energy equations in differential and integral form. These measurements along with simultaneous measurements of the time derivatives were used to estimate the radial balances of the turbulent kinetic energy and enthalpy. The derivative measurements showed significant deviations from local isotropy, even after corrections for the fluctuating convection velocity effects; these could in part be attributed to the relatively small turbulent Reynolds number and lack of an extensive inertia! subrange in the spectra.