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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v12.i123.110
pages 209-227

EFFECT OF INJECTION GAS DENSITY ON COAXIAL LIQUID JET ATOMIZATION

E. Porcheron
Laboratoire de Combustion et de Detonique, UPR 9028 au CNRS, ENSMA, Universite de Poitiers, Futuroscope Cedex, France
Jean-Louis Carreau
Institut PPRIME, Département Fluides, Thermique, Combustion, CNRS ENSMA Université de Poitiers UPR 3346, ENSMA BP 109, 86960 FUTUROSCOPE Cedex, France
D. Le Visage
Laboratoire de Combustion et de Detonique, UPR 9028 au CNRS, ENSMA, Universite de Poitiers, Futuroscope Cedex, France
Francis Roger
Institut PPRIME, Département Fluides, Thermique, Combustion, CNRS ENSMA Université de Poitiers UPR 3346, ENSMA BP 109, 86960 FUTUROSCOPE Cedex, France

ABSTRAKT

This work deals with the effect of injected gas density on the characteristics of the liquid core observed at the exit of the injection element used for cryogenic propulsion. The study was conducted at atmospheric pressure both in water/air and in liquid oxygen/inert gas. The techniques used are visualization, optical fiber probe, and a phase Doppler system. In keeping with our predictions, we show that for a constant momentum flux ratio J between the gas and the liquid, the higher the gas jet density is, the more the gas jet is capable of atomizing the liquid jet efficiently. A correlation of the liquid presence probability (LPP) on the jet axis, which implies notably J and the density ratio between the gas and the liquid, gathers the results obtained in simulation fluids and in a liquid oxygen jet, with good agreement.


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