[ASME ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - Cleveland, Ohio, USA (Sunday 6 August 2017)] Volume 4: 22nd Design for Manufacturing and the Life Cycle Conference; 11th International Conference on Micro- and Nanosystems - Conceptual Regenerative Nozzle Cooling Design for a Hydroxyl-Terminated Polybutadiene and Oxygen Hybrid Rocket Engine