Nozzle design optimization for axisymmetric scramjets by using surrogate-assisted evolutionary algorithms

Ogawa, Hideaki and Boyce, Russell R. (2012) Nozzle design optimization for axisymmetric scramjets by using surrogate-assisted evolutionary algorithms. Journal of Propulsion and Power, 28 6: 1324-1338. doi:10.2514/1.B34482

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Author Ogawa, Hideaki
Boyce, Russell R.
Title Nozzle design optimization for axisymmetric scramjets by using surrogate-assisted evolutionary algorithms
Journal name Journal of Propulsion and Power   Check publisher's open access policy
ISSN 0748-4658
1533-3876
Publication date 2012-11
Sub-type Article (original research)
DOI 10.2514/1.B34482
Volume 28
Issue 6
Start page 1324
End page 1338
Total pages 15
Place of publication Reston, VA, United States
Publisher American Institute of Aeronautics and Astronautics
Collection year 2013
Language eng
Formatted abstract
Scramjet propulsion is a promising hypersonic airbreathing technology that offers the potential for efficient and flexible access to space and high-speed atmospheric transport. Robust nozzle design over a range of operating conditions is of critical importance for successful scramjet operation. In this paper, shape optimization has been performed with surrogate-assisted evolutionary algorithms to maximize the thrust generated by an axisymmetric scramjet nozzle configuration, including the base flow and external surface for cruise conditions at Mach 8 at two altitudes with and without fuel. The optimization results have been examined in a coupled numerical/analytical approach in order to identify the key design factors and investigate the effects of design parameters. It has been found that the optimum nozzle geometries are characterized by bell-type shapes for the fuel-on conditions, whereas the optima for the fuel-off case feature nearly conical shapes. Their robustness in thrust production has been demonstrated by cross- referencing the optimum geometries at off-design altitudes. The nozzle length and radius have been found to be the most influential parameters in all considered conditions, with their optimum values determined based on the balance between inviscid and viscous force components, whereas the other parameters have minor impact on the total axial force.
Keyword Atmospheric Transport
Design optimization
Nozzle design
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
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Created: Sun, 23 Dec 2012, 00:35:38 EST by System User on behalf of School of Mechanical and Mining Engineering