The Experiments for the Enhancement of Regression Rate of Hybrid Rocket Fuel

Many studies have been conducted to increase regression rate of solid fuel in hybrid rocket. One of them resorts to swirl flow since it can extend the residence time of oxidizer in the fuel grain. Also, metal wires may lead to increase the regression rate of solid fuel as shown in solid propellants....

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Bibliographic Details
Published inJournal of mechanical science and technology Vol. 19; no. 10; pp. 1939 - 1949
Main Authors Shin Kyung-Hoon, Lee Changjin, Yu Yung H
Format Journal Article
LanguageKorean
Published 2005
Subjects
Regression Rate
Hybrid Rocket
Helical Grain
Metal Wire
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Summary:Many studies have been conducted to increase regression rate of solid fuel in hybrid rocket. One of them resorts to swirl flow since it can extend the residence time of oxidizer in the fuel grain. Also, metal wires may lead to increase the regression rate of solid fuel as shown in solid propellants. In this study, a series of experiments was designed to investigate the enhancement of regression rate of solid fuel by embedded metal wires and by fuel port grain. And fuel port was designed with a helical configuration to attempt to induce swirl flow. PMMA with gaseous oxygen is the solid fuel used for investigation. Test results showed that embedded metal wires turned out to be ineffective method because only $3-4\%$ increases in regression rate were observed. However, fuel port grain configuration yields higher burning performance of up to $50\%$ increase in regression rate. Also pitch number as well as total impulse was found to be a design variable.
Bibliography:KISTI1.1003/JNL.JAKO200504840794818
ISSN:1738-494X
1976-3824