Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Atomization and Sprays
Factor de Impacto: 1.737 Factor de Impacto de 5 años: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Imprimir: 1044-5110
ISSN En Línea: 1936-2684

Volumes:
Volumen 30, 2020 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.2013008340
pages 841-860

X-RAY RADIOGRAPHY MEASUREMENTS OF CAVITATING NOZZLE FLOW

Daniel Duke
Argonne National Laboratory; Department of Mechanical and Aerospace Engineering, Monash University, Clayton VIC 3800, Australia
Alan L. Kastengren
X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
F. Zak Tilocco
Energy Systems Division, Argonne National Laboratory, Argonne, Illinois 60439 USA
Andrew B. Swantek
Energy Systems Division, Argonne National Laboratory, Argonne, Illinois 60439 USA
Christopher F. Powell
Energy Systems Division, Argonne National Laboratory, Lemont, Illinois 60439, USA

SINOPSIS

Cavitation plays an important role in the formation of sprays from small nozzles such as those found in fuel injection systems. However, cavitation occurs over very short time and length scales, and is difficult to measure in situ. Precise experimental measurements of cavitation vapor distributions in three-dimensional nozzle geometries are valuable tools for the improvement and validation of numerical simulations. The primary quantity of interest is void fraction or local density, which is difficult to measure using visible light diagnostics. X-rays have been used to make precise measurements of the projected mass distribution of sprays, and these same techniques can be extended to cavitating flows. In this paper, we present the preliminary results of an x-ray radiography experiment on a model nozzle of 500 µm diameter. The advantages of a focused x-ray raster scanning method over traditional flat-field x-ray imaging are demonstrated. The raster scan radiography experiments achieve a spatial resolution of 5 µm and a temporal resolution of 3.6 µs. The vapor distributions are found to be very steady; time-resolved measurements indicate that rms fluctuations are not more than 1% of the mean. The spectral content of cavitation is concentrated at small Strouhal numbers on the order of 0.001 to 0.1, suggesting a steady cavitation inception and mixing process without any large-scale fluctuations. Substantial void regions at the nozzle centerline where cavitation is not expected to occur have been investigated, and may be due to dissolved gas in the fuel coming out of solution as the static pressure drops. We propose that dissolved gas is an important variable to consider in fuel spray experiments.

PALABRAS CLAVE: cavitation, x-ray, radiography

Articles with similar content:

EFFECTS OF NONCONDENSABLE GAS ON CAVITATING NOZZLES
Atomization and Sprays, Vol.25, 2015, issue 6
Michele Battistoni, Daniel Duke, Andrew B. Swantek, Sibendu Som, Christopher F. Powell, F. Zak Tilocco
LIQUID AND VAPOR SPRAY STRUCTURE IN HIGH-PRESSURE COMMON RAIL DIESEL INJECTION
Atomization and Sprays, Vol.11, 2001, issue 5
Gilles Bruneaux
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
MULTIDIMENSIONAL SIMULATION OF CAVITATING FLOWS IN DIESEL INJECTORS BY A HOMOGENEOUS MIXTURE MODELING APPROACH
Atomization and Sprays, Vol.18, 2008, issue 2
Olivier Simonin, Chawki Habchi, Nicolas Dumont
MEASUREMENT OF BREAKUP LENGTH OF CYLINDRICAL LIQUID JETS. APPLICATION TO LOW-PRESSURE CAR INJECTOR
Atomization and Sprays, Vol.11, 2001, issue 3
Christophe Dumouchel