Detail publikace

Empirical correlation for spray half cone angle in plain-jet airblast atomizers

ÚRBÁN, Á KATONA, B MALÝ, M. JEDELSKÝ, J. JÓZSA, V.

Originální název

Empirical correlation for spray half cone angle in plain-jet airblast atomizers

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Plain-jet airblast atomizers are widely used in industrial applications. The literature contains numerous papers on Sauter mean diameter, however, there is no estimation method available for spray cone angle, SCA, which derivation is the primary goal of this study. Four distinct, practical model liquids were analyzed: distilled water, diesel oil, light heating oil, and crude rapeseed oil. The atomizing pressure and liquid preheating temperature were varied in the range of 0.3–2.4 bar and 25–85 °C, respectively. This latter parameter enabled a wide and continuous liquid kinematic viscosity investigation range of 0.33–44.2 mm2/s. The resulting sprays were imaged at various shutter speeds for proper edge detection. An adaptive thresholding algorithm was developed in Matlab software environment to calculate SCA. The methodology is discussed in detail to facilitate the re-implementation of this technique since there is no generally accepted method for SCA measurement. SCA inversely varied with liquid density and followed a power law with the air-to-liquid mass flow ratio; however, the derived expression also performed well by replacing air-to-liquid mass flow ratio by either Mach number or momentum flux ratio. A simple empirical equation was derived, which allows the estimation of SCA of airblast atomization in a wide parameter range within a 3.5% deviation. The measured results were evaluated in the light of high-speed camera images in the vicinity of the nozzle; it was found that increased liquid jet breakup length decreases SCA while intense ligament formation increases it.

Klíčová slova

Airblast; Rapeseed oil; Spray cone angle; Image processing; Threshold; Atomization

Autoři

ÚRBÁN, Á; KATONA, B; MALÝ, M.; JEDELSKÝ, J.; JÓZSA, V.

Vydáno

1. 10. 2020

Nakladatel

Elsevier

ISSN

0016-2361

Periodikum

FUEL

Ročník

277

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

11

Strany počet

11

URL

https://www.sciencedirect.com/science/article/pii/S0016236120311935

Plný text v Digitální knihovně

http://hdl.handle.net/11012/193502

BibTex

@article{BUT164203,
  author="András {Urbán} and Bálint {Katona} and Milan {Malý} and Jan {Jedelský} and Viktor {Józsa}",
  title="Empirical correlation for spray half cone angle in plain-jet airblast atomizers",
  journal="FUEL",
  year="2020",
  volume="277",
  number="1",
  pages="1--11",
  doi="10.1016/j.fuel.2020.118197",
  issn="0016-2361",
  url="https://www.sciencedirect.com/science/article/pii/S0016236120311935"
}