Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Atomization and Sprays
CiteScore™: 1.6 IF: 1.189 5-Year IF: 1.596 SNIP: 1.18 SJR: 0.814

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

Volumes:
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.2016012464
pages 1111-1125

A SPIN COATING DEVICE FOR THE INVESTIGATION OF SPRAY−FILM INTERACTIONS UNDER ENGINE RELEVANT CONDITIONS

Kevin Seel
Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
Manuel Armin Reddemann
Institute of Heat and Mass Transfer, RWTH Aachen University, Augustinerbach 6, 52056 Aachen, Germany
V. Verbaere
Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
F. Mathieu
Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
M. Cardenas
Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
Wilko Rohlfs
Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
Herman D. Haustein
School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel; Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
Reinhold Kneer
Institute of Heat and Mass Transfer, RWTH Aachen University, Augustinerbach 6, 52056 Aachen, Germany

ABSTRACT

A novel spin coating device for producing homogeneous and stable thin oil films under internal combustion (IC) engine−relevant conditions is presented. A minimum film thickness of 2 µm is achievable, which seems to correspond to the thickness of oil films found on cylinder walls of IC engines. The incorporation of the spin coating device into a high-pressure chamber provides both, adjustable ambient conditions and access for optical measurement techniques. The chamber can be equipped with automotive fuel injectors spraying onto the oil films. Oil film generation is achieved via rotation of a sapphire window as film carrier surface. The resulting film thickness is determined using interferometry. Four different aspects of the evolving film thickness are observed and analyzed: (i) influence of rotational speed, (ii) influence of ambient temperature, (iii) film stability during deceleration and after the end of rotation, and (iv) spatial homogeneity of the film. The results confirm that the main parameter influencing minimum film thickness is rotational speed, as it scales centrifugal forces. As oil viscosity strongly decreases with temperature, ambient temperature has an effect on film thickness, too. The film can be considered homogeneous after end of rotation, which is a prerequisite for well-defined investigations of spray−film interactions.