A pseudo-implicit predictor-corrector relaxation method with five-point central differencing in space has been developed for the solution of the governing differential equations of the rotor free-wake problem. It is shown that this implementation exhibits good covergence characteristics of the rotor wake, but with only a moderate increase in computational expense compared to simpler methods. The present method is also generalized to allow unequal azimuth and wake segment angles that help maximize the fidelity of the results but minimize computational requirements. While the emphasis in this paper is on the numerical method itself, the results are compared with experimental measurements of the rotor wake geometry and flow field velocities in hover and forward flight.


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    Title :

    Rotor free-wake modeling using a relaxation technique - including comparisons with experimental data


    Additional title:

    Die Auslegung einer freien Luftschraubenströmung durch einen Rotor mittels einer Relaxationstechnik, einschließlich Vergleichen mit experimentellen Werten


    Contributors:
    Bagai, A. (author) / Leishman, J.G. (author)


    Publication date :

    1994


    Size :

    22 Seiten, 17 Bilder, 41 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English