Liquid sheet disintegration at high pressure: An experimental approach |
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Authors: | V.G. Fernandez P. Berthoumie G. Lavergne |
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Affiliation: | aONERA (Office national d'études et de la recherche aérospatiales), Heterogeneous, Multiphase Flows Unit, Aerodynamic and Energetic Models Department, BP 4025, 2, avenue Edouard-Belin, 31055 Toulouse cedex 4, France |
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Abstract: | The primary atomization was studied in a 300 μm thickness water sheet, generated by a planar airblast atomizer. The research novelty consisted in increasing the airflow absolute pressure from atmospheric conditions to 6 bar. The experimental techniques employed included Oscillometry by Laser Intensity Reflexion (ORIL), Laser Doppler Velocimetry (LDV) and flow visualization by fast video camera. The atomization mechanisms, described in the literature at atmospheric environments, were observed at high pressure conditions, for a constant momentum flux ratio. Furthermore, a new atomization mechanism was observed at high values of this ratio. Finally, dimensionless relations have been proposed for the global oscillation frequency, minimum air oscillation velocity, break-up distance and transversal wavelength. To cite this article: V.G. Fernandez et al., C. R. Mecanique 337 (2009). |
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Keywords: | Fluid mechanics Primary break-up High pressure testing Airblast atomizerMots-clé s: Mé canique des fluides Atomization primaire Essais haute pression Atomiseur aé rodynamique |
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