MASS-DRIVER- AND SCRAMJET-ASSISTED SURFACE-TO-ORBIT MODELING AND SIMULATION

摘要

In an effort to explore the potential benefits of alternate surface-to-orbit propulsion techniques, model-based and measured values were used to create a simulation of a mass-driver- and SCRamjet-assisted surface-to-orbit system. This simulated pseudo-single-stage-to-orbit vehicle is launched from a mass driver at the threshold of supersonic flight at which point the SCRamjet is activated and rapidly ascends. Heating and performance limitations are assessed using models on SCRamjet behavior as a function of altitude and speed, and is compared with real behavior of the X-43 and X-51 SCRamjet vehicles. Additionally, speed limitations at higher altitudes are examined in order to minimize the use of liquid boosters needed to circularize at Low Earth Orbit (LEO) altitudes. Subject headings: computational methods: advanced modeling and simulation techniques — propulsion systems: system performance, dynamics, and control — missions and vehicles: general