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http://dx.doi.org/10.6108/KSPE.2020.24.1.024

Effects of Injector Recess and Combustion Chamber Length on Combustion Stability of Swirl Coaxial Injectors  

Bak, Sujin (School of Mechanical Engineering, Chungbuk National University)
Hwang, Donghyun (School of Mechanical Engineering, Chungbuk National University)
Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University)
Yoon, Youngbin (Department of Aerospace Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.24, no.1, 2020 , pp. 24-33 More about this Journal
Abstract
In this study, model combustion tests were conducted to investigate the combustion instability characteristics of swirl coaxial injectors for a liquid rocket engine. To examine the effects of the combustion chamber resonant frequency and the injector mixing conditions, pressure fluctuations in the combustion chamber were measured by changing the combustion chamber length, injector recess length, and propellant mixture ratio. From the test results, the variation in the pressure fluctuations for each experimental condition was confirmed and the combustion stability was evaluated by stability mapping. It was found that the longitudinal mode and Kelvin-Helmholtz instabilities occurred due to the change in the combustion chamber and recess lengths.
Keywords
Combustion Instability; Kelvin-Helmholtz Instability; Longitudinal Mode; Recess Length; Swirl Coaxial Injector;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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