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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Experimental Study of Primary Break-up of Liquid Jets in Cross Airflows

Madjid Birouk
Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6 Canada

Thomas Stabler
School of Mechanical, Materials, Manufacturing Engineering and Management University of Nottingham, Nottingham NG7 2RD, UK.

Barry J. Azzopardi
Department of Chemical, Environmental and Mining Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, England

DOI: 10.1615/IHTC12.4470
6 pages

Abstract

An experimental study of the primary break-up of liquid jets in a cross-flow of gas has been carried out on a specially designed wind tunnel facility. The measurement station was made of clear acrylic resin to allow optical access and visualization. The working liquid used in the present experiment was the aero-engine lubrication oil, which was injected into the airflow, via a nozzle from the top wall of the test-section. The effects of oil viscosity, and the jet and gas cross-flow velocities on the primary break-up mechanisms of the jet were studied. Two different break-up regimes were identified; column break-up and bag break-up separated by a transition zone. The correlation proposed by Wu et al. to predict the jet transverse penetration before the break-up, as a function of the liquid/airflow momentum-flux ratio, was found to be applicable only for liquids with low viscosity.

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