Field methods based on the finite-difference approximations of the time-domain Maxwell's equations and the potential-flow equation have been developed to solve the multidisciplinary problem of airfoil shaping for aerodynamic efficiency and low radar cross section (RCS). A parametric study and an optimization study employing the two analysis methods are presented to illustrate their combined capabilities. The parametric study shows that for frontal radar illumination, the RCS of an airfoil is independent of the chordwise location of maximum thickness but depends strongly on the maximum thickness, leading-edge radius, and leadingedge shape. In addition, this study shows that the RCS of an airfoil can be reduced without significant effects on its transonic aerodynamic efficiency by reducing the leading-edge radius and/or modifying the shape of the leading edge. The optimization study involves the minimization of wave drag for a non-lifting, symmetrical airfoil with constraints on the airfoil maximum thickness and monostatic RCS. This optimization study shows that the two analysis methods can be used effectively to design aerodynamically efficient airfoils with certain desired RCS characteristics.


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    Titel :

    Shape optimization for aerodynamic efficiency and low observability


    Beteiligte:
    Vinh, Hoang (Autor:in) / Van Dam, C. P. (Autor:in) / Dwyer, Harry A. (Autor:in)

    Kongress:

    AIAA, Fluid Dynamics Conference ; 1993 ; Orlando, FL, United States


    Erscheinungsdatum :

    01.07.1993


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Shape Optimization for Aerodynamic Efficiency and Low Observability

    Vinh, H. / Van Dam, C. P. / Dwyer, H. A. et al. | British Library Conference Proceedings | 1993


    Shape optimization for aerodynamic efficiency and low observability

    VINH, HOANG / VAN DAM, C. / DWYER, HARRY | AIAA | 1993


    Improving the Efficiency of Aerodynamic Shape Optimization

    Burgreen, G.W. | Online Contents | 1994


    Improving the efficiency of aerodynamic shape optimization

    Burgreen, Greg W. / Baysal, Oktay / Eleshaky, Mohamed E. | AIAA | 1994


    Improving the efficiency of aerodynamic shape optimization

    Burgreen, Greg W. / Baysal, Oktay / Eleshaky, Mohamed E. | NTRS | 1994