Detail publikace

Konverze energie při atomizaci typu effervescent

JEDELSKÝ, J. JÍCHA, M.

Originální název

Energy conversion during effervescent atomization

Český název

Konverze energie při atomizaci typu effervescent

Anglický název

Energy conversion during effervescent atomization

Typ

článek v časopise

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.

Český abstrakt

Příspěvek popisuje konverzi energie při atomizaci typu effervescent. Atomizace kapalin je z pohledu energie process transformace vstupní energie médií do povrchové energie vytvořených kapek. Kvalitativně popisujeme děje doprovázející vnitřní proudění, výtok dvoufázové směsi a tvorbu spreje se zaměřením na konverzi energie u effervescent atomizace. Dále je provedeno kvantitativní hodnocení jednotlivých energetických toků pro různé provozní režimy effervescent atomizeru. Více v anglické verzi.

Anglický 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

Atomizace kapalin, transformace energie, vnitřní proudění, konverze energie, effervescent atomizace

Rok RIV

2013

Vydáno

01.09.2013

Nakladatel

Elsevier

Místo

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

Strany od

836

Strany do

844

Strany počet

9

URL

Plný text v Digitální knihovně

BibTex


@article{BUT104267,
  author="Jan {Jedelský} and Miroslav {Jícha}",
  title="Energy conversion during effervescent atomization",
  annote="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.",
  address="Elsevier",
  chapter="104267",
  doi="10.1016/j.fuel.2013.03.053",
  institution="Elsevier",
  number="1",
  volume="111",
  year="2013",
  month="september",
  pages="836--844",
  publisher="Elsevier",
  type="journal article"
}