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

ISBN Imprimir: 978-1-56700-019-1

ISBN On-line: 978-1-56700-445-5

TWO-PHASE FLOW MEASUREMENTS IN COXIAL JETS INCLUDING PARTICLE SIZING

Resumo

Two-phase flow measurements in coaxial jets (water and tenside aqueous solutions - air) with similar velocities and injector geometry to the VULCAIN engine were the main purposes of this study. Firstly, a fiber optic device determined the Liquid Presence Probability (LPP = 1 - void fraction) in the dense part of the jet. Secondly, the Phase Doppler Particle Analizer (PDPA) technique measured diameters and velocities of liquid particles. The following results were obtained . i) radial and axial Liquid Presence Probability distributions present a characteristic behaviour of the dense phase in the near field, more evident for initial liquid velocity ≥ 15 m.s-1, ii) the dilute spray region (LPP ≤ 0.1) exhibits phase slipping and contains little volume of the injected liquid.
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