Additively Manufactured Axial-Injection, End-Burning Hybrid Motor Regression Rate Study

摘要

Baseline results of testing axial-injection, end-burning hybridrocket motors using ABS plastic printed with fused deposition modelingindicate that the regression rate is influenced by the chamberpressure similar to other axial-injection, end-burning hybrid motortests. In addition, the fuel mass flux generated by these fuel grainsis comparable to that of previously examined sintered-type, axialinjection,end-burning hybrid rocket motors. The ability to maintainthe fuel mass flux enhancement seen in sintered-type axial-injection,end-burning hybrid rocket motors is significant because a volumetricallysmaller fuel grain could be produced with additive manufacturing.This ability to decrease volume is beneficial for applicationsrelated to small satellite propulsion or other volume-limited situations.Future work will investigate the impact of the size and spacingof oxidizer ports and the impact of temperature on the regression rate.