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ICLASS 97
Proceedings of the Seventh International Conference on Liquid Atomization and Spray Systems

ISBN 打印: 89-950039-2-8

Liquid Core Characterisation of Coaxial Liquid Oxygen/Inert Gas Jets

Abstract

The objective of this study is to investigate the atmospheric atomization of a liquid oxygen jet by a coaxial inert gas jet (He, N2, Ar) in the near field region. Experimental flow velocities and injector geometry try to simulate the conditions present in a CRYOGENIC engine. By means of fiber optic as phase sensor for the dense phase of the spray, the main following results were obtained: i) In the near field of the jet, the Liquid Presence Probability (LPP) presented a top hat shape according to the liquid potential core while in the medium field, the radial distribution was self preserving. ii) LPP axial evolutions were found to be related with gas to liquid momentum ratio MR but also with gas density. iii) According to [1], we proposed a correlation for the liquid jet intact length (LPP = 050) related to the gas/liquid density ratio, Weber and Reynolds numbers.
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