Analysis of liquid spray with and without homogeneous background turbulence

Douglas W. Carter, Filippo Coletti

Research output: Contribution to conferencePaper

Abstract

We employ a large chamber of homogeneous turbulence in a recently introduced facility to experimentally investigate the properties of a liquid water spray produced by a hollow-cone nozzle. We characterize the properties of the spray issued in quiescent and turbulent air, and in particular: the spray penetration, its mixing with the surrounding air, the droplet size distribution, and the related Eulerian and Lagrangian two-point correlations. This is the first study in which spray dynamics are investigated over the full range of relevant scales with and without a turbulent background. To this end we perform planar imaging at various spatial and temporal resolutions. Focusing on a window in the far field, we perform particle tracking velocimetry using a high-speed laser and camera system, and droplet sizing by shadowgraphy using a low-speed high-resolution camera mounted on a long-range microscope and synchronized with a pulsed LED. The resulting spray penetration and flow characteristics for cases with and without background turbulence are discussed.

Original languageEnglish (US)
StatePublished - Jan 1 2019
Event11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 - Southampton, United Kingdom
Duration: Jul 30 2019Aug 2 2019

Conference

Conference11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
CountryUnited Kingdom
CitySouthampton
Period7/30/198/2/19

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Carter, D. W., & Coletti, F. (2019). Analysis of liquid spray with and without homogeneous background turbulence. Paper presented at 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019, Southampton, United Kingdom.