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Atomization and Sprays

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ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays


18 pages

EXPERIMENTS ON ANNULAR LIQUID JET BREAKUP

Jihua Shen
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, Canada

ABSTRACT

Department of Mechanical and Material Engineering, University of Western Ontario, London, Ontario, Canada Experimental investigations have been carried out for the breakup process of an annular water jet exposed to an inner air stream by videographic and photographic techniques. Three flow regimes for the jet breakup process have been identified—i.e., bubble formation, annular jet formation, and atomization. Within the bubble formation regime, the jet breakup characteristics measured from the photographs taken under various liquid and gas velocities indicate that nearly uniform bubbles were observed for various air-to-water velocity ratios; both the jet breakup length and the wavelength for bubble formation decreased as the air-to-water velocity ratio was increased. The measurements were compared with the predictions by linear instability analysis, and fair agreement was obtained