Abstract
Concentrated hydrogen peroxide has been studied widely due to its green storable and high energy density characteristics. However, there are few experimental results regarding pressure instability with catalyst reactivity and support size in monopropellant thrusters. In the present study, hydrogen peroxide monopropellant thrusters with three different catalytic bed aspect ratios were tested with a MnO2-mixed PbO catalyst to investigate the effect on chugging instability and pressure drop across the catalyst bed. As a result, the chugging instability can be reduced by using a high reactivity catalyst and the pressure drop was considerably affected by catalytic support sizes.
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