Accession Number : ADA116263

Title :   Surface Generation for Aerodynamic Applications,


Personal Author(s) : Sobieczky,H

PDF Url : ADA116263

Report Date : Jun 1981

Pagination or Media Count : 22

Abstract : This paper describes an analytical procedure to obtain the geometry of wing-body combinations, missiles, rotors and propellers, to be used in computational algorithms as well as for automated tool manufacturing wind tunnel models for flow-field analysis, with emphasis on parametrical shape variations needed in aerodynamic design and optimization procedures. Analytical shape definition allows for arbitrary surface coordinates generation to be combined with three-dimensional (flow space) grid generators. Present version of the code (E88-A) defines the wing along sections at constant span, with smooth deviations near the wing root section, which is projected onto the body surface. The body is defined by cross-section shapes based on superelliptic arcs, connecting analytic crown lines and planform projection curves. Wing sections are defined by an analytical blending between given root and central sections for the inner part of the wing, and the same between the central and tip section for the outer part of the wing. These three basic airfoils may be given as dense data from preceding two-dimensional design or as relatively few spline supports for an interpolation technique of suitably stretched ordinates in order to density airfoil data. (Author)

Descriptors :   *Airfoils, *Interactive graphics, *Aerodynamic configurations, *Computer aided design, Parametric analysis, Flow fields, Algorithms, Optimization, Shape, Surface properties, Projective geometry, Shock, Wing body configurations, Splines(Geometry), Wings, Transonic characteristics, Guided missiles, Rotors, Propellers, Wind tunnel models, Computer graphics, Generators

Subject Categories : Theoretical Mathematics
      Guided Missile Dynam, Config & Cntrl Surfaces

Distribution Statement : APPROVED FOR PUBLIC RELEASE