The presented work is dedicated to the numerical study of the aerodynamic characteristics of the helicopter rotor. Two approaches to modeling of the rotor are applied: the free wake model developed by the Authors with using steady airfoil characteristics and the Unsteady RANS method based on the Ansys Fluent software. The modes of hovering and horizontal flight in the range of advancing ratio μ = (0-0.45) are considered. The shapes of the rotor wake, the distributions of the normal force coefficient and the fields of inductive velocities for all considered flight modes are calculated. For a particular case with μ = 0.25 there is a comparison with experimental data. The time needed for calculation of the applied methods is estimated. Accuracy of the used methods in the framework of the solved task is analysed with taking into account used models assumptions. It is shown that in the range of μ = (0-0.25) the free wake model provides a fast and reliable calculation of the aerodynamic characteristics of the helicopter rotor. For values of μ > 0.35 it is necessary to take into account the unsteady characteristics of the airfoil.


    Access

    Download


    Export, share and cite



    Title :

    Modelling the helicopter rotor aerodynamics at forward flight with free wake model and URANS method


    Contributors:


    Publication date :

    2020




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Free-Wake Computation of Helicopter Rotor Flowfield in Forward Flight

    Ramachandran, K. / Schlechtriem, S. / Caradonna, F. X. et al. | British Library Conference Proceedings | 1993



    Wake Structure of a Helicopter Rotor in Forward Flight

    Briassulis, G. | Online Contents | 1993



    Wake Structure of a Helicopter Rotor in Forward Flight

    G. Briassulis / J. Andreopoulos | AIAA | 1993