Optimisation of round bodies for aerodynamic performance and stability at supersonic speeds

W. Jiajan, R.S.M. Chue, T. Nguyen, Ching Man Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


An optimisation procedure coupled with computational fluid dynamics (CFD) is proposed to minimise the aerodynamic drag and to improve the static and dynamic stabilities of generic rounds at supersonic speeds (Mach 1·5 to 4). First, the Active-set algorithm, Sequential Quadratic Programming (SQP) is used as the optimisation method for drag minimisation. The objective function is the zero-lift drag computed from a semi-empirical solution. The constraints are based on the geometric restrictions of the body. CFD is then employed to validate the accuracy of the drag prediction from the semi-empirical solution and to incorporate the stability requirements into the optimisation process. A supersonic round body is considered as an example application. The optimised body provides up to 15% drag reduction and 46% increase in gyroscopic stability while remaining dynamically stable over the whole range of the operating Mach numbers.
Original languageEnglish
Pages (from-to)661-685
Number of pages25
JournalAeronautical Journal
Issue number1193
Publication statusPublished - 1 Jan 2013
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering


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