Abstract
For many years, Hybrid Rockets have been expected to be put in to practical use because of their advantages. On the other hand, there are some technical problems. Above all, the most significant problem with conventional hybrid rockets is their very low regression rate. However, research has discovered that paraffin-based fuel has a higher regression rate property than that of conventional fuels. It has been concluded, theoretically, that the high regression rate of paraffin-based fuel is caused by its low viscosity in the melted layer. In this study, the burning mechanisms of paraffin fuel, using a two dimensional combustion chamber, were investigated. In addition, a laboratory scale hybrid rocket engine with a swirling GOX was built to change the swirling angle and GOX mass flux. We observed a melted fuel layer on the solid paraffin-based fuel. And we confirmed that paraffin fuel burned about twice as fast by swirling GOX.
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