Atomization of liquid issued from an ultra high-speed rotary bell

S. Ogasawara, M. Daikoku, T. Inamura, Yasuhiro Saito, Y. Matsushita, H. Aoki, T. Miura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The purpose of this study is to investigate how the flow pattern of a liquid film formed on an ultra high-speed rotary bell, and its breakup at the outer edge of the bell, affect the liquid atomization. We observed the breakup pattern produced at the edge of a rotary bell and studied whether or not the characteristics of the atomization produced by the rotary bell used in this study, agree with the results of previous studies. We categorized the flow pattern on the surface of the rotary bell, which varied with the rotational speed and the liquid flow rate, and categorized the liquid breakup patterns at the edge. At lower rotational speeds, it was confirmed that the liquid on the rotary bell’s surface was a smooth film, and the liquid breakup patterns at the outer edge were a pseudo-dropwise breakup in which large droplets were formed, in addition to Rayleigh breakup resulting from the detachment of several long ligaments. At higher rotational speeds, it was confirmed that fine ligamentwise breakup wherein the dropsize distribution can be relatively narrow took place as a result that lots of small waves were generated which in turn developed into serrated waves whose tip-end portions became saw-tooth shapes in the liquid flow, the breakup pattern at that time was such that lots of fine ligaments were elongated and subsequently split into fine droplets. We confirmed promotion of atomization, while we considered that the liquid film as serrated wave was largely attributable to be issued from the edge of rotary bell.

Original languageEnglish
Title of host publication11th International Annual Conference on Liquid Atomization and Spray Systems 2009, ICLASS 2009
PublisherILASS Americas/Professor Scott Samuelsen UCI Combustion Laboratory University of California Irvine, CA 92697-3550
ISBN (Electronic)9781617826535
Publication statusPublished - 2009
Event11th International Annual Conference on Liquid Atomization and Spray Systems, ICLASS 2009 - Vail, United States
Duration: 2009 Jul 262009 Jul 30

Publication series

Name11th International Annual Conference on Liquid Atomization and Spray Systems 2009, ICLASS 2009

Conference

Conference11th International Annual Conference on Liquid Atomization and Spray Systems, ICLASS 2009
CountryUnited States
CityVail
Period09/7/2609/7/30

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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