A new implementation of the vortex step method for predicting subsonic propeller blade aerodynamic loading is described. The analysis, taking advantage of the classical work by Rankine, Betz, and Glauert, also accounts for the effects of an axisymmetric nacelle in both the vector boundary condition and Glauert velocity diagram. Wake-induced velocities are examined, including effects of wake extent and “observer” position. A certain “equivalence” is demonstrated for the classical results of Betz, Glauert, Goldstein and Theodorsen for the optimum-wake-induced velocities. The effects of wake continuity and rollup are studied, relative to a simple helical wake. Thrust loading calculations are compared to NACA wake-pressure-derived test data. Rationale and methods for geometry “math modeling” are shown and illustrated. Finally, geometric and aerodynamic models are integrated for the preliminary design of a new propeller. “The propeller vortex sheet is fundamental to the understanding and calculation of the aerodynamic force distribution along the propeller blades.” -- A.B. Bauer (25)


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Math Modeling of Propeller Geometry and Aerodynamics


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    General, Corporate & Regional Aviation Meeting & Exposition ; 1999



    Erscheinungsdatum :

    1999-04-20




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Propeller Aerodynamics

    B.W. MCCORMICK | NTIS | 1956


    Propeller Aerodynamics

    Bose, Tarit | Springer Verlag | 2012


    Over Wing Propeller Aerodynamics

    Cooper, R. K. / McCann, W. J. / Chapleo, A. Q. | British Library Online Contents | 1992


    Math modeling of airfoil geometry

    Barnes, J.P. | Tema Archiv | 1996


    Theory of supersonic-propeller aerodynamics

    Ordway, D.E. / Hale, R.W. | Engineering Index Backfile | 1960