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http://dx.doi.org/10.6108/KSPE.2013.17.6.001

A Study on the Combustion Instability of the Hybrid Rocket Motor with a Diaphragm  

Lee, Jungpyo (Technical Support, Flowmaster Korea)
Kim, Youngnam (Flow and Noise)
Kim, Jinkon (School of Aerospace & Mechanical Engineering, Korea Aerospace University)
Moon, Heejang (School of Aerospace & Mechanical Engineering, Korea Aerospace University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.17, no.6, 2013 , pp. 1-10 More about this Journal
Abstract
In this paper, the main cause on excitation of the combustion instability which may occur in the hybrid rocket motor with a diaphragm was studied. Hybrid rocket motor propulsion tests considering various experimental conditions such as with a diaphragm or not, a diameter of diaphragm, oxidizer mass flow rate, fuel length, etc were performed, and the combustion visualization for the inside of a hybrid rocket motor with a diaphragm was performed. With these experimental results, it was confirmed that the main cause of a large excitation was the hole-tone, and it was shown that the hole-tone model can be predicted experimental primary pressure oscillation frequency quite well.
Keywords
Hybrid Rocket; Diaphragm; Combustion Instability; Hole-tone; Excitation Frequency;
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