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An Experimental Evaluation of Metallic and Non Metallic Powders as Additive for Paraffin-based Hybrid Rocket Fuels

par Bertoldi, Artur Elias de Morais A.E.d.M.;Gelain, Riccardo ;Hendrick, Patrick
Référence ASCenSIon Conference (12-14 September 2023: Dresden, Germany)
Publication Non publié, 2023-09-14

Communication à un colloque

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Résumé :

ybrid Rocket Engines (HREs) could replace existing liquid engines for some specific applications such as small launchers or upper stage of launcher vehicles. On the other hand, hybrid rocket technology has some development challenges in comparison with more mature chemical propulsion systems and one of the main drawbacks is the low regression rate of the solid fuel, and relatively poor combustion efficiency. In HREs, the fact that the fuel is in the solid phase makes it very easy to add solid performance-enhancing materials. This study presents the results of a series of experimental investigations using paraffin-based grains doped with Magnesium-Diboride (MgB2), Lithium Aluminum Hydride (LAH) and Multi-Walled Carbon Nanotubes (MWCNTs) with concentrations from 0,5% to 1,5%. The fuel matrices were compared in terms of regression rate and c* efficiency. The results for magnesium diboride and MWCNTs were very similar, except for 1,5 % MWCTS grains that presented the lower performance. The best results were for the grains doped with LAH, both in terms of regression rate and c* efficiency.