Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Atomization and Sprays
Импакт фактор: 1.737 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

Выпуски:
Том 30, 2020 Том 29, 2019 Том 28, 2018 Том 27, 2017 Том 26, 2016 Том 25, 2015 Том 24, 2014 Том 23, 2013 Том 22, 2012 Том 21, 2011 Том 20, 2010 Том 19, 2009 Том 18, 2008 Том 17, 2007 Том 16, 2006 Том 15, 2005 Том 14, 2004 Том 13, 2003 Том 12, 2002 Том 11, 2001 Том 10, 2000 Том 9, 1999 Том 8, 1998 Том 7, 1997 Том 6, 1996 Том 5, 1995 Том 4, 1994 Том 3, 1993 Том 2, 1992 Том 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v17.i7.20
pages 601-620

ATOMIZATION BEHAVIOR AND ENERGY ANALYSIS FOR A SINGLE DROPLET IMPINGED ON A SURFACE OSCILLATING WITH ULTRASONIC FREQUENCY

Masataka Arai
Division of Mechanical Science and Technology, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan; Tokyo Denki University
Akira Ishii
Department of Mechanical System Engineering, Gunma University, Kiryu, Japan
Masahiro Saito
Department of Mechanical System Engineering, Gunma University, Kiryu, Gunma, Japan

Краткое описание

The atomization behavior of a single droplet impinged on a surface oscillating with ultrasonic frequency of 20 kHz was investigated as a new method of fine-spray formation. Distilled water, ethanol, and a glycerin solution were used as the test liquids to clarify the effects of surface tension and viscosity on the ultrasonic atomization. Also, the effects of amplitude of oscillation and droplet volume on the ultrasonic atomization were investigated. As a result, it was found that a fine spray could be formed by the droplet impingement to an oscillating surface when the amplitude was ≤50 μm, while some ligaments and large droplets were formed at >50 μm amplitude. The Sauter mean diameter (SMD) of the spray formed after the impingement was approximately D32 = 70 μm for small amplitudes, but the SMD became large with an increase of the amplitude. At a small amplitude of 25 μm, the surface energy of the spray after impingement increased remarkably compared with that of the single droplet before impingement. Thus, the small amplitude of oscillation could allow the formation of a fine spray by disintegrating the liquid film formed after the droplet impingement. On the contrary, at large amplitudes of >50 μm, the kinetic energy of the spray after impingement exceeded the surface energy; namely, the oscillation energy acted on the rebounding rather than the atomization of the droplet. The atomization efficiency decreased exponentially with an increasing of the amplitude of oscillation regardless of the physical properties of the liquids.


Articles with similar content:

Heat transfer and flow field measurements of a pulsating round jet impinging on a flat heated surface
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2018, issue
Gershon Grossman, V. Rinsky, Motti Raizner, R. van Hout
Atomization of Liquids with Widely Differing Material Properties by Ultrasonic Standing-Waves
International Journal of Fluid Mechanics Research, Vol.24, 1997, issue 4-6
Klaus Bauckhage
EFFECT OF LIQUID PROPERTIES ON THE BREAKUP MECHANISM OF HIGH-SPEED LIQUID DROPS
Atomization and Sprays, Vol.11, 2001, issue 1
Rolf D. Reitz, Chang Sik Lee
ATOMIZATION CHARACTERISTICS OF JET-TO-JET AND SPRAY-TO-SPRAY IMPINGEMENT SYSTEMS
Atomization and Sprays, Vol.9, 1999, issue 4
Masataka Arai, Masahiro Saito
ATOMIZATION OF NON-NEWTONIAN LIQUIDS
ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems, Vol.0, 1994, issue
Norman Chigier, Adel Mansour