Evidence of local axisymmetry in the small scales of a turbulent planar jet

Abstract

The small-scale characteristics of turbulent flow resulting from a jet exhausting into a quiescent environment is investigated. The Reynolds number based on exit conditions is approximately 20 000. Second-order derivative moments are obtained using flying hot-wire techniques. The measured derivative moments are used to evaluate both deviations from the requirements of local isotropy and the conditions for turbulence that is locally invariant about a preferred direction. Results of the rate of dissipation of kinetic energy are presented.