Investigation of ABS-Paraffin Based 3D Printed Hybrid Rocket Fuels

The research focuses on the effects of embedding a structure composed of ABS plastic into a paraffin based hybrid rocket fuel grain using gaseous oxygen as an oxidizer. Over 100 static firing tests at various oxidizer mass flow rates and chamber pressures were performed on three different structure configurations as well as baseline grains composed of solid ABS or paraffin. The added structures provided significant improvements in regression rate over the paraffin baseline, which were accompanied by increases in combustion and mixing efficiency.