Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN En Línea: 2152-5110

Volumen 47, 2020 Volumen 46, 2019 Volumen 45, 2018 Volumen 44, 2017 Volumen 43, 2016 Volumen 42, 2015 Volumen 41, 2014 Volumen 40, 2013 Volumen 39, 2012 Volumen 38, 2011 Volumen 37, 2010 Volumen 36, 2009 Volumen 35, 2008 Volumen 34, 2007 Volumen 33, 2006 Volumen 32, 2005 Volumen 31, 2004 Volumen 30, 2003 Volumen 29, 2002 Volumen 28, 2001 Volumen 27, 2000 Volumen 26, 1999 Volumen 25, 1998 Volumen 24, 1997 Volumen 23, 1996 Volumen 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v24.i4-6.10
pages 450-460

An Experimental Study on Droplet Interactions

G. Lavergne
Heterogeneous, Multiphase Flows Unit, Aerodynamic and Energetic Models Department, Office National d'Etudes et de la Recherche Aérospatiales (ONERA), 31055 Toulouse Cedex 4, France
O. Adam
ONERA/CERT/DERMES, Toulouse, France
J. F. Virepinte
ONERA/CERT/DERMES, Toulouse, France
Y. Biscos
ONERA/CERT/DERMES, Toulouse, France


This paper describes a basic experiment on rectilinear mono sited droplets stream allowing the improvement of the understanding of the physical processes (droplet-droplet interaction, droplet evaporation, ...) occurring in dense sprays. The droplet stream is investigated at different locations downstream by optical measurements to get the droplet diameter, temperature and velocity with or without combustion. To study the droplet stream in low interaction an electrostatic droplet deflector has been developed to increase the droplet spacing. Ethanol was the simulation fluid used during these experiments. The droplet stream was investigated in cold conditions to study the influence of droplet spacing on the drag coefficient. The distance parameter is defined by the ratio of droplet spacing to droplet size. The results are compared to the correlations of Mulholland and Zhu. These correlations overestimate the drag coefficient for distance parameters lower than 20. We propose a new correlation to improve the prediction of the drag coefficient for a large range of spacing parameter 2 < C < 40. The droplet stream was ignited as it passes through an electrically heated coil. The experimental results are compared to the classical D2 law, which overestimates the droplet evaporation in strong interaction. The preliminary results concern a burning droplet stream with an initial droplet diameter Dg0 = 124 μm and velocity Vg0 = 8.3 ms−1 and C0 = 2. For a distance parameter C = 12, the results do not match the D2 law showing the usefulness of the droplet deflector.