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Self-similar pressure-atomized sprays

Published online by Cambridge University Press:  21 February 2020

H. Hinterbichler Open the ORCID record for H. Hinterbichler [Opens in a new window] ,
H. Steiner  and
G. Brenn Open the ORCID record for G. Brenn [Opens in a new window]
H. Hinterbichler*
Affiliation:
Institute of Fluid Mechanics and Heat Transfer, Graz University of Technology, Inffeldgasse 25/F, 8010 Graz, Austria
H. Steiner
Affiliation:
Institute of Fluid Mechanics and Heat Transfer, Graz University of Technology, Inffeldgasse 25/F, 8010 Graz, Austria
G. Brenn
Affiliation:
Institute of Fluid Mechanics and Heat Transfer, Graz University of Technology, Inffeldgasse 25/F, 8010 Graz, Austria
*
†Email address for correspondence: [email protected]
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Abstract

Sprays produced by pressure atomization of various liquids are investigated experimentally, showing the self-similar flow fields of both the liquid and the gas phases. Phase-Doppler measurements are conducted in the sprays at varying radial and axial distances from the atomizer orifice. The theoretical description of the gas flow field based on boundary-layer theory reveals a self-similar velocity field driven by momentum transfer from the liquid phase ejected into the gaseous environment. The momentum loss of the liquid droplet phase is also found to be self-similar, which was to be expected, but not shown in the literature before. The analytical self-similar description of the two-phase flow field is in excellent agreement with the experimental data.

JFM classification

Drops and Bubbles: Aerosols/atomization Multiphase and Particle-laden Flows: Multiphase flow Drops and Bubbles: Drops
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 889 , 25 April 2020 , A17
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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