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

Volumes:
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.i1-3.80
pages 76-87

Effects of Mixing Chamber Geometry and Flow on Spray Characteristics from an Internal Mixing Twin-Fluid Atomizer

S. Kim
Central Research Center, Hyundai Motor Company, Yongin, Korea
Sh. Kondo
Component & System Development Center, Toyota Motor Corporation, Toyota, Japan
Keiya Nishida
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
Hiroyuki Hiroyasu
Institute of Industrial Technology, Kinki University, Higashi-Hiroshima, Japan

SINOPSIS

The influences of the mixing chamber geometry of an internal-mixing, twin-fluid atomizer on atomization was examined by visualization of the flow pattern within the mixing chamber and measurement of the Sauter mean diameter of the spray. When the water jet entered as a column state into the outlet hole of the mixing chamber, the breakup of the water was complicatedly changed, with an increase in the atomizing air/water mass ratio. The breakup of the water within the mixing chamber for this flow pattern is divided into four steps: 1. Breakup of the water jet through the outlet hole, 2. Breakup of the water film on the outlet hole surface, 3. Breakup of the water jet in the mixing chamber, 4. Breakup of the water film on the side and top surfaces of the mixing chamber. When the outlet hole of the mixing chamber was located at a coaxial position to the water and atomizing air flow, atomization is mainly occurred at the breakup of the water jet through the outlet hole. The Sauter mean diameter could be reduced by changing the mixing chamber length, the outlet hole diameter, and the ratio of the outlet hole length/diameter. When the outlet hole of the mixing chamber was located at an eccentric position to the water and atomizing air flow, the flow pattern of the water within the mixing chamber was changed to a film state. In this case, atomization mainly occurred at the breakup of the water films on the side and top surfaces of the mixing chamber and the outlet hole surface at all the atomizing air/water mass ratios, and the Sauter mean diameter becomes smaller than that in the case of the outlet hole at a coaxial position to the water and atomizing air flow.