Publication detail

Interaction of pressure swirl spray with cross-flow

CEJPEK, O. MALÝ, M. SLÁMA, J. AVULAPATI, M. JEDELSKÝ, J.

Original Title

Interaction of pressure swirl spray with cross-flow

Type

journal article in Web of Science

Language

English

Original 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-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 mu 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.

Keywords

Pressure swirl spray; Cross-flow; Pressure swirl spray trajectory; Droplet spatial distribution; Droplet collision; Conical liquid sheet; Bag breakup

Authors

CEJPEK, O.; MALÝ, M.; SLÁMA, J.; AVULAPATI, M.; JEDELSKÝ, J.

Released

1. 11. 2022

Publisher

SPRINGER

Location

NEW YORK

ISBN

0935-1175

Periodical

Continuum Mech Therm

Year of study

34

Number

6

State

United States of America

Pages from

1497

Pages to

1515

Pages count

19

URL

https://link.springer.com/article/10.1007/s00161-022-01142-3

BibTex

@article{BUT179247,
  author="Ondřej {Cejpek} and Milan {Malý} and Jaroslav {Sláma} and Madan {Avulapati} and Jan {Jedelský}",
  title="Interaction of pressure swirl spray with cross-flow",
  journal="Continuum Mech Therm",
  year="2022",
  volume="34",
  number="6",
  pages="19",
  doi="10.1007/s00161-022-01142-3",
  issn="0935-1175",
  url="https://link.springer.com/article/10.1007/s00161-022-01142-3"
}