Spray Patterns and Injection Characteristics of Gas-Centered Swirl Coaxial Injectors
Publication: Journal of Aerospace Engineering
Volume 30, Issue 5
Abstract
Spray characteristics of gas-centered swirl coaxial injectors, which are commonly used in staged combustion cycle engines, are investigated numerically and experimentally. The spray angle and the spreading angle are the quantitative parameters selected for experimental and numerical studies, respectively. Various gas/liquid Reynolds numbers are adopted for the operating conditions. For a fixed gas Reynolds number, the spreading angle increases with the liquid Reynolds number. Through the comparative study of the spray angle from water/air experiments, the spreading angle is analyzed for different momentum flux ratios (MFRs). The comparison of the spray and spreading angles for different MFRs shows good agreement. Modeling and study of gas–gas flow is a useful approach to understanding spray characteristics of gas–liquid flow.
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Acknowledgments
This work was supported by Advanced Research Center Program (NRF-2013R1A5A1073861) through the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) contracted through Advanced Space Propulsion Research Center at Seoul National University. The first author appreciates Dr. G. Jourdain for his assistance in writing the manuscript.
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Published In
Journal of Aerospace Engineering
Volume 30 • Issue 5 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Aug 14, 2016
Accepted: Feb 1, 2017
Published online: May 4, 2017
Published in print: Sep 1, 2017
Discussion open until: Oct 4, 2017
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