The Design and Simulation of an External Burning Scramjet

Fletcher, Alistair (2010). The Design and Simulation of an External Burning Scramjet Honours Thesis, School of Engineering, The University of Queensland.

       
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Author Fletcher, Alistair
Thesis Title The Design and Simulation of an External Burning Scramjet
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2010
Thesis type Honours Thesis
Supervisor Vincent Wheatley
Total pages 50
Language eng
Subjects 0913 Mechanical Engineering
Formatted abstract
This thesis investigates the feasibility of external scramjet propulsion. The aim of the project is to progress the research into external supersonic combustion by generating a theoretical design with computational fluid dynamic (CFD) simulations. Eilmer3 programming has been used to computationally analyse the flow, however a positive net thrust was not determined. Different geometries and quantities of injected fuel have been simulated to determine their effect on the resultant lateral force. A maximum drag reduction of 342 N was calculated from the simulations.

Two theoretical models have been proposed and compared with each other, refining the calculations to produce an optimum realistic specific thrust of 264.9 m/s and specific impulse of 1863.8 s. Assuming constant momentum along each streamtube over the combustion ramp gave the most accurate answers.

It is recommended that research in hypersonic external burning continues, modifying the simulations until a net thrust is achieved that is comparable to the theory presented in the second theoretical approach.

All necessary background literature to develop an understanding in hypersonic flow is discussed, acknowledging the work of others where appropriate.
Keyword External Burning Scramjet

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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Created: Wed, 08 Jul 2015, 12:59:33 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service