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Continuum Mechanics and Thermodynamics
Erschienen in: Continuum Mechanics and Thermodynamics 6/2022

29.08.2022 | Original Article

Interaction of pressure swirl spray with cross-flow

verfasst von: Ondrej Cejpek, Milan Maly, Jaroslav Slama, Madan Mohan Avulapati, Jan Jedelsky

Erschienen in: Continuum Mechanics and Thermodynamics | Ausgabe 6/2022

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Abstract

Sprays are exposed to ambient flow in most of their applications, which alters the spray behaviour. The understanding of spray performance in realistic conditions allows for nozzle improvements, process intensification, or emission reductions. The present paper investigates the pressure-swirl atomizer operating at three Reynolds numbers in the inlet ports (Re\(_{\mathrm{p}})\) 960, 1330 and 1880, subjected to low-turbulence cross-flow with aerodynamic Weber number (We) from 0 to 7.1. High-speed visualization and phase Doppler anemometry (PDA) captured the characteristic shape and trajectory of the spray, droplet dynamics, droplet collisions, and spatial droplet distributions. An empirical correlation for a mean spray trajectory prediction was developed for a wide range of flow parameters. An analytical model of the droplet trajectory was assembled and validated using PDA data. The model accurately predicts trajectories for droplets larger than 40 \(\upmu \)m. A mutual interaction of droplets was investigated. Elevated cross-flow velocity (v) increased the impact Weber number and the total droplet collision rate and enhanced the droplet mixing. A bag breakup regime was observed for the liquid to the air momentum ratio (q) lower than 300. The bag breakup modified the initial droplet velocity. The experiments imply the formation of a complicated vortex structure around the pressure swirl spray in cross-flow.
Vorheriger Artikel The evolution of Hooke’s law under finite plastic deformations for fiber-reinforced materials
Nächster Artikel How regularization concepts interfere with (quasi-)brittle damage: a comparison based on a unified variational framework

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Metadaten
Titel
Interaction of pressure swirl spray with cross-flow
verfasst von
Ondrej Cejpek
Milan Maly
Jaroslav Slama
Madan Mohan Avulapati
Jan Jedelsky
Publikationsdatum
29.08.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
Continuum Mechanics and Thermodynamics / Ausgabe 6/2022
Print ISSN: 0935-1175
Elektronische ISSN: 1432-0959
DOI
https://doi.org/10.1007/s00161-022-01142-3

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