Topology optimization of hybrid rocket fuels for additive manufacturing

Hybrid rockets are promising propulsion systems with wide margins for yet unexplored development. In order to fully exploit the potential of these systems, the consideration of a hybrid fuel combining a solid grain and a liquid oxidizer is being examined. To achieve a fuel with low environmental impact and maximized performance, a Multidisciplinary Design Optimization (MDO) problem needs to be formulated. This involves the development of a MDO framework specifically for optimizing the solid grain, taking into consideration additive manufacturing constraints and utilizing a propulsion model to predict the specific impulse generated. Ultimately, a multi-objective function is established, combining both structural and performance goals.