Full flow-path design optimisation of axisymmetric scramjets with premixed fuel / air
Ogawa, Hideaki and Boyce, Russell R. (2011). Full flow-path design optimisation of axisymmetric scramjets with premixed fuel / air. In: 14th Australian Aeronautical Conference (AIAC14-AERO). AIAC14 Fourteenth Australian International Aerospace Congress, Melbourne, Australia, (). 28 February-3 March 2011.
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Scramjets (supersonic combustion ramjets) is a promising hypersonic airbreathing technology that can enable reliable and efficient access-to-space and atmospheric flight at hyper velocity. Scramjet flowfields are inherently highly complex due to substantial coupling of various aerodynamic and aerothermal phenomena. In the present study a full flow-path design optimisation has been conducted for an internal-compression axisymmetric scramjet based on the configuration to be used in the SCRAMSPACE project. Evolutionary algorithms are employed to optimise the full scramjet geometry for maximum net thrust (or minimum overall drag) at Mach 8 in the presence of viscous effects and chemical reactions with a premixed fuel / air inflow assumption. The flowfields for the optimum and baseline geometries have been probed and compared to investigate the key design factors and flow physics. The influence of the design parameters on the engine performance and efficiencies has been examined by evaluating contributions from the individual components at design and off-design points.
The Australian International Aerospace Congress incorporates: 14th Australian Aeronautics Conference; 7th DSTO International Conference on Health & Usage Monitoring (HUMS2011); 3rd Asia-Pacific International Symposium on Aerospace Technology (APISAT). This is an APISAT paper, presented in session 5B, theme: Propulsion.