Design of Multiport Grain with Hydrogen Peroxide Hybrid Rocket

摘要

A high length-to-diameter ratio of a rocket leads to unstable flight performance,affects structural loads,and makesa high dry mass of the rocket with a diameter constraint. To improve the volumetric efficiency of the fuel,a multiportdesign with optimum O //7 ratio was considered by adjusting the number of ports and diameter while decreasing thelength. To optimize the O /F ratio,the final port diameter was predicted,and the arrangement of the ports to preventthe merging of the ports was considered. The length of the fuel content was reduced to 30% when the number of portswas 14,compared with the single-port fuel. The experimental result showed a slight decrease in the O /F ratio with theincreased number of ports and reduced length of fuel at the same oxidizer mass flow rate,and the characteristicvelocity efficiency increased. Peak-to-peak pressure amplitude in the prechamber was calculated to compare theeffect on the amplitude of the multiport fuels. The application of the simple cylindrical multiport design reduces thelength-to-diameter ratio of the hybrid thruster and improves rocket combustion performance.