Periodic atomization characteristics of an impinging jet injector element modulated by Klystron effect

被引：0
作者：
Anlong YANG [1 ]
Bin LI [1 ]
Shangrong YANG [1 ]
Yunfei XU [1 ]
Longfei LI [1 ]
机构：
[1] Science and Technology on Liquid Rocket Engine Laboratory, Xi’an Aerospace Propulsion Institute
来源：
Chinese Journal of Aeronautics | 2018年 / 10期
基金：
中国国家自然科学基金;
关键词：
Atomization; Combustion stability; Impinging jet injector; Klystron effect; Liquid rocket engine; Mie scatter;
D O I：
暂无
中图分类号：
V434 [液体推进剂火箭发动机];
学科分类号：
080703 ; 082502 ;
摘要：
An experimental study on the Klystron effect of periodic injection modulated by pressure drop fluctuations on subsequent atomization is conducted. Time-resolved atomization backlit images and atomization Mie scatter images are captured by using the high speed camera. It is found that periodicity of forced atomization relies on pressure drop fluctuation amplitude and phase differences between atomization and pressure drop fluctuations relate to fluctuation frequencies. This feature of periodic atomization induced by Klystron effect corresponds to periodicities and high amplitudes of pressure fluctuations in unstable combustion chambers and chaos and low amplitudes of pressure fluctuations in stable combustions chambers. Drastically periodic varying of gross surface area of droplets with time was shown in Mie scatter images. The importance of periodic impinging jet atomization modulated by pressure drop fluctuations for acoustic liquid propellant combustion instabilities is illustrated.
引用
收藏
页码：1973 / 1984
页数：12
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