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DROPLET TRANSPORT IN HIGH REYNOLDS NUMBER WAKE FLOW

Ali Bagherpour
Department of Mechanical Engineering University of New Brunswick 15 Dineen Drive, Fredericton, NB, Canada

A. Gordon L. Holloway
Department of Mechanical Engineering University of New Brunswick 15 Dineen Drive, Fredericton, NB, Canada

Abstract

This paper describes a study of droplet transport in high Reynolds number turbulent shear flow. A dilute polydisperse droplet spray was introduced into an axisymmetric disk wake with Re ~ 6 × 105. The Reynolds number and droplet sizes used in this study cover a range of Stokes numbers 5 < St < 500 and a mass loading of 10−2. Data was gathered using a Phase Doppler Interferometer capable of measuring droplet size and 3 components of droplet velocity simultaneously. Results are sorted into 5 ranges of Stokes numbers and include wake profiles of droplet concentration, mean droplet velocity, and the dominant components of the droplet velocity fluctuation covariance.