Detail publikace

Energy conversion during effervescent atomization

JEDELSKÝ, J. JÍCHA, M.

Anglický název

Energy conversion during effervescent atomization

Typ

Článek WoS

Jazyk

en

Originální abstrakt

The paper qualitatively describes processes during the internal flow, discharge of two-phase mixture as well as spray formation with a particular focus on the energy transfer during effervescent atomization of light heating oil. The near nozzle spray visualization elucidates the liquid breakup process at different operation modes. Numerical results illustrate the forms of energy involved in the atomization process, their values and the influence of operational conditions on relations between the energy forms. The main part of the paper focuses on the atomization efficiency. A simple method for estimation of the atomization efficiency of pneumatic atomizers is proposed; surface tension energy of created droplets, obtained from phase-Doppler anemometry data, is compared with the energy required for atomization. The atomization efficiency of effervescent atomizers is found to be in fragments of per cents for atomizing pressures ranging between 0.1 and 0.5 MPa, and gas-to-liquid ratios (GLRs) between 0.02 and 0.1, and it is inferior, by about one order of magnitude to the efficiency of simple pressure and pressure-swirl atomizers for a comparable droplet size. The efficiency declines with both the pressure and GLR with approximately logarithmic tendency.

Klíčová slova anglicky

Twin-fluid atomization, Effervescent atomization, Atomization efficiency, Energy conversion, Two-phase flow, SUSPENSION PLASMA SPRAY; TWIN-FLUID ATOMIZATION; 2-PHASE FLOW; ATOMIZER; LIQUID; PERFORMANCE; UNSTEADINESS; REGIMES; BREAKUP; NOZZLE

Vydáno

2013-09-01

Nakladatel

Elsevier

Místo

The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England

ISSN

0016-2361

Časopis

Fuel

Ročník

111

Číslo

1

Strany od–do

836–844

Počet stran

9

BIBTEX


@article{BUT104267,
  author="Jan {Jedelský} and Miroslav {Jícha}",
  title="Energy conversion during effervescent atomization",
  journal="Fuel",
  year="2013",
  volume="111",
  number="1",
  pages="836--844",
  doi="10.1016/j.fuel.2013.03.053",
  issn="0016-2361",
  url="https://www.sciencedirect.com/science/article/pii/S001623611300241X"
}