Review on the regression rate-improvement techniques and mechanical performance of hybrid rocket fuels

Human spaceflight, space tourism, and the launch of microsatellites are all expected to grow in future. In fact, with recent increase satellite market, almost 1000 smallsats per year foreseen be launched over next decade. Hybrid rocket propulsion has received significant attention for military commercial applications due its potential safety, throttleable, restart ability when compared solid rockets, economicity, simplicity, compactness features liquid rockets. However, order make this new technology future generation some drawbacks heterogeneous combustion hybrid rockets such as low fuel regression rate varying oxidizer-to-fuel ratio during process must well addressed. The diffusion-limited motor is responsible poor efficiency fuels Hydroxyl-terminated polybutadiene (HTPB), Poly methylmethacrylate (PMMA), other polymeric binder-fuels. paraffin-based represents a solution slow current fuels. suffer from mechanical properties rapid volatilization, preventing their full development mission. work, review various techniques improve fuel's ballistic performance presented.