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Shock control bump design optimization on Natural Laminar Aerofoil

Lee, D-S, Periaux, J, Srinivas, K, Gonzalez, LF, Onate, E, Qin, N, & , (2011) Shock control bump design optimization on Natural Laminar Aerofoil. In Kuzmin, Alexander & , (Eds.) Computational Fluid Dynamics 2010 : Proceedings of the Sixth International Conference on Computational Fluid Dynamics, ICCFD6, Springer, St Petersburg.

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    Abstract

    The paper investigates Shock Control Bumps (SCB) on a Natural Laminar Flow (NLF) aerofoil; RAE 5243 for Active Flow Control (AFC). A SCB approach is used to decelerate supersonic floow on the suction/pressure sides of transonic aerofoil that leads delaying shock occurrence or weakening of shock strength. Such an AFC technique reduces signi�cantly the total drag at tran- sonic speeds. This paper considers the SCB shape design optimisation at two boundary layer transition positions (0% and 45%) using an Euler software coupled with viscous boundary layer e�ects and robust Evolutionary Algorithms (EAs). The optimisation method is based on a canonical Evolution Strategy (ES) algorithm and incorporates the concepts of hierarchical topology and parallel asynchronous evaluation of candidate solution. Two test cases are considered with numerical experiments; the first test deals with a transi- tion point occurring at the leading edge and the transition point is fixed at 45% of wing chord in the second test. Numerical results are presented and it is demonstrated that an optimal SCB design can be found to significantly reduce transonic wave drag and improves lift on drag (L/D) value when compared to the baseline aerofoil design.

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    ID Code: 39521
    Item Type: Conference Paper
    Additional URLs:
    Keywords: ACTIVE FLOW CONTROL , Hybrid Optimisation, UAV, UAS
    ISBN: 9783642178832
    Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Optimisation (010303)
    Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > AEROSPACE ENGINEERING (090100)
    Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > AEROSPACE ENGINEERING (090100) > Aircraft Performance and Flight Control Systems (090104)
    Divisions: Current > Research Centres > Australian Research Centre for Aerospace Automation
    Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
    Past > Schools > School of Engineering Systems
    Copyright Owner: Copyright 2010 please consult the authors
    Deposited On: 11 Jan 2011 10:12
    Last Modified: 11 Aug 2011 03:35

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