Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Atomization and Sprays
Impact-faktor: 1.262 5-jähriger Impact-Faktor: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

Volumes:
Volumen 29, 2019 Volumen 28, 2018 Volumen 27, 2017 Volumen 26, 2016 Volumen 25, 2015 Volumen 24, 2014 Volumen 23, 2013 Volumen 22, 2012 Volumen 21, 2011 Volumen 20, 2010 Volumen 19, 2009 Volumen 18, 2008 Volumen 17, 2007 Volumen 16, 2006 Volumen 15, 2005 Volumen 14, 2004 Volumen 13, 2003 Volumen 12, 2002 Volumen 11, 2001 Volumen 10, 2000 Volumen 9, 1999 Volumen 8, 1998 Volumen 7, 1997 Volumen 6, 1996 Volumen 5, 1995 Volumen 4, 1994 Volumen 3, 1993 Volumen 2, 1992 Volumen 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v6.i6.50
pages 709-726

MODELING CAVITATING FLOWS IN DIESEL INJECTORS

Yongliang Chen
School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907
Stephen D. Heister
Maurice J. Zucrow Laboratories, Department of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana, USA

ABSTRAKT

A numerical model has been developed to simulate unsteady cavitation processes in plain-orifice pressure atomizers typically used in diesel engine fuel injectors. The model is implemented via solution of the two-phase Navier Stokes equations formulated with the use of a pseudo-density which varies between vapor and liquid densities. Results for sharp-edged orifices indicate that partial cavitation flows are typically periodic, with a period of the order of the orifice transit time. Reducing orifice diameter tends to inhibit both the initiation and the overall extent of the cavitated region. Even a slight rounding of the orifice inlet lip has dramatic effects on both cavitation and orifice discharge characteristics. Rounding tends to inhibit cavitation substantially, and also increases orifice discharge coefficient under both cavitated and noncavitated conditions. Finally, the cavitation field appears to develop quite rapidly (on the order of a few nozzle transit times) at the initiation of the injection process.