Multi-objective Optimization of Electric Pumps for Hybrid Rocket Engines

A multi-objective optimization of an electric pump for hybrid rockets is carried out through an evolutionary algorithm. The pump is modeled by means of a meanline flow method. For given values of required head and flow rate, some of the pump design parameters are varied to minimize the power and the torque to be delivered by the motor. The two minima do not coincide because of the dependence of pump power losses on shaft speed for different geometries; Pareto-optimal solutions are found near the upper bound of the chosen speed range