Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Atomization and Sprays
Facteur d'impact: 1.262 Facteur d'impact sur 5 ans: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v13.i56.20
pages 443-474

DEVELOPMENT OF MICRO-DIESEL INJECTOR NOZZLES VIA MEMS TECHNOLOGY AND EFFECTS ON SPRAY CHARACTERISTICS

Seunghyun Baik
Engine Research Center and Engineering Physics, University of Wisconsin, Madison, Wisconsin, USA
James P Blanchard
College of Engineering, University of Wisconsin - Madison
Michael L. Corradini
Engine Research Center and Engineering Physics, University of Wisconsin, Madison, Wisconsin, USA

RÉSUMÉ

Micro-machined diesel injector nozzles have been designed, fabricated, and used with commercially produced diesel injection systems in the study of spray dynamics. Such a system, properly designed, may improve spray behavior in direct-injection (DI) diesel engines by improved atomization and fuel–air mixing.
In this work, 14 micro-planar orifice nozzles were fabricated using the micro-electro-mechanical-systems (MEMS) technique. Circular-orifice diameters were varied from 40 to 260 μm, and the number of orifices was varied from one to 169. Three plates with noncircular orifices were also fabricated to examine the effect of orifice shape on spray characteristics. These nozzles were then attached to commercial injectors and the associated injection systems were used for the spray experiments.
Given these novel injection systems, jet spray characteristics of micro-planar-orifice nozzles were investigated experimentally using optical diagnostic techniques in a pressurized constant-volume cylindrical chamber. Local drop sizes were measured by the laser diffraction technique, and average drop sizes of the whole sprays were measured by the light extinction technique. Current test results show expected qualitative trends in spray kinematics and drop sizes, but quantitative magnitudes of the behavior are less dependent on orifice geometry than first anticipated. Droplet coalescence among adjacent sprays was apparent for the multiple-orifice nozzles because all the orifices were aligned in the same direction with limited spacing. Nonplanar configurations are under development and may show improved performance.


Articles with similar content:

ENGINE COMBUSTION NETWORK (ECN): MEASUREMENTS OF NOZZLE GEOMETRY AND HYDRAULIC BEHAVIOR
Atomization and Sprays, Vol.22, 2012, issue 12
Tim Bazyn, Raul Payri, Alan L. Kastengren, Lyle M. Pickett, Julien Manin, Christopher F. Powell, F. Zak Tilocco
CHARACTERIZATION OF PROTOTYPE HIGH-PRESSURE SWIRL INJECTOR NOZZLES, PART I: PROTOTYPE DEVELOPMENT AND INITIAL CHARACTERIZATION OF SPRAYS
Atomization and Sprays, Vol.10, 2000, issue 2
Sangmin Choi, Changsoo Jang, Choongsik Bae
EXPERIMENTAL ANALYSIS OF HIGH PRESSURE DIESEL SPRAY IMPINGEMENT ON A FLAT WALL
International Heat Transfer Conference 13, Vol.0, 2006, issue
L. Allocca, A. De Vita, Luca Andreassi, Vittorio Rocco, Stefano Ubertini
THE INFLUENCE OF ECCENTRICITY ON THE PERFORMANCE OF A COAXIAL PREFILMING AIR-ASSIST ATOMIZER
Atomization and Sprays, Vol.11, 2001, issue 1
Thomas Richter, Andreas Glathe, Gunter Wozniak
CHARACTERIZATION OF HIGH-INJECTION-PRESSURE DIESEL SPRAYS WITH RELATION TO PARTICULATE AND NOx EMISSIONS
Atomization and Sprays, Vol.8, 1998, issue 1
T. F. Su, Patrick V. Farrell