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ICLASS 94<br>Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems

ISBN:
978-1-56700-019-1 (Print)
978-1-56700-445-5 (Online)

STUDY ON WAVE MOTION AND BREAKUP OF ANNULAR LIQUID SHEET IN A GAS STREAM

Hiroyuki Hashimoto
Institute of Fluid Science, Tohoku University, Sendai, Japan

Satoyuki Kawano
Institute of Fluid Science, Tohoku University, Sendai, Japan

Hidenori Togari
Institute of Fluid Science, Tohoku University, Sendai, Japan

Akio Ihara
Institute of Fluid Science, Tohoku University, Sendai, Japan

T. Suzuki
Toyohashi University of Technology, Japan

Toshikazu Harada
Toyota Motor Corporation, Japan

Abstract

The wave motion of annular liquid sheet in a gas stream was investigated experimentally and theoretically. It was experimentally confirmed that the wave amplitude of the liquid sheet interface grew along the downstream of nozzle and finally brokedown into the fine liquid drops. The wave motion on the gas−liquid interface in the annular liquid sheet, which was related closely with the atomization phenomena, was studied experimentally based on the optical measurement technique and theoretically based on the Kelvin−Helmholtz instability theory. The effect of the inner and outer gas stream velocities on the wave motion was clarified experimentally. The theoretical results qualitatively agreed with the experimental results on the wave number and the growth rate.