Detail publikace

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

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

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

25. 2. 2024

Nakladatel

PERGAMON-ELSEVIER SCIENCE LTD

Místo

OXFORD

ISSN

0301-9322

Periodikum

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW

Ročník

172

Číslo

february 2024

Stát

Spojené království Velké Británie a Severního Irska

Strany počet

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"
}