This thesis aimed to conduct a feasibility study of external combustion as a means of creating a larger control moment for high-speed vehicles (HSV). Furthermore, this thesis was a validation of experimental data obtained by Project ICARUS; the author¡¦s of whom were to design and produce an externally combusting scramjet. For CFD validation, the boundary conditions Beinke et al (2010) tested in were used in the CFD simulations.
The thesis was broken into sections. Firstly, the full exhaust property was found using NASA CEA. Minor exclusions were made to the exhaust composition, before it was modelled using a 19species methane gas model, with a corresponding reaction scheme. This model, along with the boundary conditions specified by Beinke et. Al (2010), were successfully modelled and simulated in Eilmer3. In total, four conclusive simulations were processed to determine if external combustion occurred in non viscous and viscous simulations.
The major findings of this feasibility study are:
•Viscosity plays a significant role in the promotion of external combustion.
•Conditions for external combustion to occur require higher pressures and temperatures then what was achieved in this study.
•In the configuration and model used in this study, external combustion does not increase the pressure force, and as such, does not aid in increasing the control pitching moment.