Publication detail

Adaptation of conical liquid sheet and spray morphologies to cross-flowing gas

CEJPEK, O. MALÝ, M. PRINZ, F. HÁJEK, O. JEDELSKÝ, J. JÍCHA, M.

Original Title

Adaptation of conical liquid sheet and spray morphologies to cross-flowing gas

Type

journal article in Web of Science

Language

English

Original Abstract

A variety of industrial devices use liquid injection into the traverse stream of air. Ambient flow changes the spray characteristics, which can alter a system's function. Two different spill-return pressure-swirl atomizers (SRA) were investigated under cross -flow. One of the tested atomizers generates a conical liquid sheet with shorter breakup lengths due to reduced internal air-core stability. Phase Doppler anemometer (PDA) was used for 2D velocity and droplet size measurements, along with high-speed visualization to record instantaneous spray behaviour. A wide range of operating parameters was tested, e.g., inlet pressure (pl) ranging from 0.25 MPa to 1 MPa, spill-to-feed ratio (SFR) from 0 to 0.9, and cross -flow velocity from 0 to 32 m/s. As the cross -flow velocity increases, the spray starts to tilt and the breakup length (lb) shortens as a result of increased aerodynamic forces. This reduces the differences between atomizers. Moreover, the droplet diameter depends on the lb, yet no semiempirical model was found to accurately predict the droplet sizes. A map of breakup modes was established, and a transition point from long- to short-wave mode was identified. The Linear Stability Analysis of the liquid sheet breakup was used and compared with a semi-empirical approach for the first time for the SRA and cross -flow conditions. The results imply that considering only quiescent ambient conditions during atomizer development might not lead to the optimal design.

Keywords

Pressure-swirl; Spill-return; Cross-flow; Spray cone angle; Liquid sheet; Breakup length; Linear stability analysis

Authors

CEJPEK, O.; MALÝ, M.; PRINZ, F.; HÁJEK, O.; JEDELSKÝ, J.; JÍCHA, M.

Released

25. 2. 2024

Publisher

PERGAMON-ELSEVIER SCIENCE LTD

Location

OXFORD

ISBN

0301-9322

Periodical

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW

Year of study

172

Number

february 2024

State

United Kingdom of Great Britain and Northern Ireland

Pages count

12

URL

https://www.sciencedirect.com/science/article/pii/S0301932223003348?via%3Dihub

BibTex

@article{BUT182173,
  author="Ondřej {Cejpek} and Milan {Malý} and František {Prinz} and Ondřej {Hájek} and Jan {Jedelský} and Miroslav {Jícha}",
  title="Adaptation of conical liquid sheet and spray morphologies to cross-flowing gas",
  journal="INTERNATIONAL JOURNAL OF MULTIPHASE FLOW",
  year="2024",
  volume="172",
  number="february 2024",
  pages="12",
  doi="10.1016/j.ijmultiphaseflow.2023.104714",
  issn="0301-9322",
  url="https://www.sciencedirect.com/science/article/pii/S0301932223003348?via%3Dihub"
}