Detail publikace

Výzkum vlivu okolní turbulence na sprej naftového motoru ve vířivé komoře

JAKUBÍK, T. LAWES, M. WOOLLEY, R. JÍCHA, M.

Český název

Výzkum vlivu okolní turbulence na sprej naftového motoru ve vířivé komoře

Anglický název

STUDY OF AMBIENT TURBULENCE EFFECTS ON DIESEL SPRAYS IN A FAN-STIRRED VESSEL

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

This study investigates the influence of the ambient turbulence on a pressure atomized diesel-like spray in the well characterized and controlled turbulence flow field of a fan-stirred experimental vessel. Injections were performed into nitrogen at 15 bar and 400 K under four turbulent conditions with RMS velocities ranging from 0.5 up to 5.5 m/s. Mie-scatter laser sheet and Schlieren techniques were applied to visualize the liquid and the vapor phase of the spray. With increasing turbulence there was increasing formation of droplet clusters and ligaments which resulted in a reduced detection of droplet vapor along the whole penetration length of the spray. From considerations of the Stokes numbers for the droplet-turbulence interaction, it is concluded that the micro length scales of the ambient turbulence were the probable source of this droplet clustering.

Český abstrakt

This study investigates the influence of the ambient turbulence on a pressure atomized diesel-like spray in the well characterized and controlled turbulence flow field of a fan-stirred experimental vessel. Injections were performed into nitrogen at 15 bar and 400 K under four turbulent conditions with RMS velocities ranging from 0.5 up to 5.5 m/s. Mie-scatter laser sheet and Schlieren techniques were applied to visualize the liquid and the vapor phase of the spray. With increasing turbulence there was increasing formation of droplet clusters and ligaments which resulted in a reduced detection of droplet vapor along the whole penetration length of the spray. From considerations of the Stokes numbers for the droplet-turbulence interaction, it is concluded that the micro length scales of the ambient turbulence were the probable source of this droplet clustering.

Anglický abstrakt

This study investigates the influence of the ambient turbulence on a pressure atomized diesel-like spray in the well characterized and controlled turbulence flow field of a fan-stirred experimental vessel. Injections were performed into nitrogen at 15 bar and 400 K under four turbulent conditions with RMS velocities ranging from 0.5 up to 5.5 m/s. Mie-scatter laser sheet and Schlieren techniques were applied to visualize the liquid and the vapor phase of the spray. With increasing turbulence there was increasing formation of droplet clusters and ligaments which resulted in a reduced detection of droplet vapor along the whole penetration length of the spray. From considerations of the Stokes numbers for the droplet-turbulence interaction, it is concluded that the micro length scales of the ambient turbulence were the probable source of this droplet clustering.

Klíčová slova anglicky

diesel spray, turbulence, droplet clustering, cfd, droplet-turbulence interaction

Rok RIV

2006

Vydáno

01.11.2006

Nakladatel

Begell House

Místo

50 Cross highway, Redding, CT 06896

ISSN

1044-5110

Časopis

Atomization and sprays

Ročník

16

Číslo

6

Strany od–do

687–703

Počet stran

17

BIBTEX


@article{BUT43502,
  author="Tomáš {Jakubík} and Malcolm {Lawes} and Robert {woolley} and Miroslav {Jícha},
  title="STUDY OF AMBIENT TURBULENCE EFFECTS ON DIESEL SPRAYS IN A FAN-STIRRED VESSEL",
  journal="Atomization and sprays",
  year="2006",
  volume="16",
  number="6",
  month="November",
  pages="687--703",
  publisher="Begell House",
  address="50 Cross highway, Redding, CT 06896",
  issn="1044-5110"
}