Combustion Characteristics of Hybrid Rocket Motor Using GAP As a Solid Fuel (II)

Hybrid rockets using Glycidyl Azide Polymer (GAP) as a solid fuel has been studied. Linear burning rate spectrum of GAP was spread with a dilution of polyethylene glycol (PEG), and basically, self combustible mixtures are used for the gas hybrid rocket motor, and non-self combustible mixtures for traditional hybrid motor. Ultrasonic measurement is employed using three sensors especially developed for this use to evaluate the instantaneous surface regression rates in the traditional hybrid motor. Results from three sensors set at the upstream, middle and downstream of 1.3m length motor give indispensable information for the establishment of the flame model of hybrid motor.