Multi-objective design optimisation of inlet and combustor for axisymmetric scramjets

Ogawa, H., Boyce, R. R., Isaacs, A. and Ray, T. (2010) Multi-objective design optimisation of inlet and combustor for axisymmetric scramjets. The Open Thermodynamics Journal, 4 6: 86-91. doi:10.2174/1874396X01004010086

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Author Ogawa, H.
Boyce, R. R.
Isaacs, A.
Ray, T.
Title Multi-objective design optimisation of inlet and combustor for axisymmetric scramjets
Formatted title

Journal name The Open Thermodynamics Journal
ISSN 1874-396X
Publication date 2010
Sub-type Article (original research)
DOI 10.2174/1874396X01004010086
Open Access Status DOI
Volume 4
Issue 6
Start page 86
End page 91
Total pages 6
Place of publication Bussum, Netherlands
Publisher Bentham Open
Collection year 2011
Language eng
Formatted abstract
Scramjet airbreathing propulsion is a promising technology for efficient and economical access-to-space. Flow compression in the inlet and fuel combustion in the combustor play a major role in scramjet mechanism, their efficiencies crucially influencing the overall scramjet performance. A double-objective shape optimisation for an axisymmetric inlet and combustor configuration using hydrogen as fuel premixed into air has been performed for minimum total pressure loss and maximum combustion efficiency in the present study. A state-of-the-art MDO (multi-objective design optimisation) capability with surrogate-assisted evolutionary algorithms has been employed, coupled with a CFD solver for inviscid flowfields involving chemical reactions represented by Evans & Schexnayder’s model. The obtained Pareto optimal front suggests the possibility of substantial improvement in efficiency and the counteracting nature of the two objective functions. Geometries with higher combustion efficiency are characterised by a higher compression inlet with larger leading-edge radius and a longer combustor, whereas opposite trends are observed for configurations with smaller total pressure loss.
Keyword Multi-objective design optimisation
Axisymmetric scramjet
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Created: Fri, 25 Feb 2011, 13:38:11 EST by Dr Hideaki Ogawa on behalf of School of Mechanical and Mining Engineering