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RESEARCH PAPERS

Measurements of the Spray Angle of Atomizing Jets

[+] Author and Article Information
K.-J. Wu, C.-C. Su

Department of Mechancial and Aerospace Engineering, Princeton University, Princeton, N. J. 08544

R. L. Steinberger

Department of Mechanical Engineering, Bucknell University, Lewisburg, Pa.

D. A. Santavicca, F. V. Bracco

Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, N. J. 08544

J. Fluids Eng 105(4), 406-413 (Dec 01, 1983) (8 pages) doi:10.1115/1.3241019 History: Received December 03, 1981; Online October 26, 2009

Abstract

Liquid jets are considered issuing from single-hole, round nozzles into quiescent gases under conditions such that they break up into a well defined conical spray immediately at the nozzle exit plane. The initial angles of such sprays were measured at room temperature by a spark photography technique. Water, n-hexane, and n-tetradecane at pressures from 11.1 MPa to 107.6 MPa were injected into gaseous N2 at pressures from 0.1 MPa to 4.2 MPa through sixteen nozzles of different geometry. Under the test conditions, the spray angle is found to be a strong function of the nozzle geometry and the gas-liquid density ratio and a weak function of the injection velocity. The measured trends are then discussed in the light of possible mechanisms of the breakup process and shown to be compatible with the aerodynamic theory of surface breakup if modified to account for nozzle geometry effects.

Copyright © 1983 by ASME
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