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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F06%3APU62856" target="_blank" >RIV/00216305:26210/06:PU62856 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

Výzkum vlivu okolní turbulence na sprej naftového motoru ve vířivé komoře

Czech description

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.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BK - Liquid mechanics

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2006

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Atomization and sprays

ISSN

1044-5110

e-ISSN

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Volume of the periodical

16

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

687-703

UT code for WoS article

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EID of the result in the Scopus database

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