Analysis of turbulent transport properties in the near field of an isothermal free jet.

Abstract

Simultaneous two-component laser Doppler velocity measurements were made in the isothermal, turbulent flowfield, of an axisymmetric jet. Mean velocities, normal and shear stresses and triple products were measured and presented at axial positions x/D = 1 to 22. A balance of turbulent kinetic energy in the flow was performed. The production, convection and diffusion of turbulent kinetic energy were computed directly from the experimental data using central differences. In this study, three velocity bias correction schemes were used and the effects of each of them on the behavior of the mean velocities, normal and shear stresses, triple products, production terms, convection terms and diffusion of the turbulent kinetic energy will be presented.