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ICLASS 94<br>Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems

ISBN:
978-1-56700-019-1 (Print)
978-1-56700-445-5 (Online)

FORMATION AND DISINTEGRATION CHARACTERISTICS OF LIQUID SHEETS GENERATED IN ANNULAR ORIFICES

K. Ramamurthi
Thermodynamics and Combustion Laboratory, Indian Institute of Technology, Madras, Chennai 600036, India

T. John Tharakan
Liquid Propulsions Systems Centre, Indian Space Research Organization,Valiamala, Thiruvananthapuram 695547, India

Abstract

Experiments are conducted with annular orifices to determine the role of the geometrical parameters of the orifice on the formation and disintegration characteristics of annular liquid sheets and the discharge coefficient. Injection pressure drops upto 1.2MPa which are of interest in liquid propellant rocket injectors are considered. It is shown necessary to have annular gaps of the orifice about an order of magnitude greater than the thickness of the liquid film in the annulus so that a conical spray with uniform disintegration characteristics are achieved.