The dynamic stall characteristics of conventional airfoils used in helicopter blades, and airfoils whose shapes change dynamically with time are numerically studied. Two-dimensional Navier-Stokes equations in integral form are solved on a body-fitted grid that deforms as the airfoil changes its shape, and rotates with the airfoil in pitch. The scheme is second order accurate in time and space. The effects of turbulence are accounted for using a two-layer eddy viscosity model. The computed surface pressure distributions and the integrated loads show that the dynamically deforming leading edge airfoil has a superior performance compared to the NACA 0012 airfoil. It tends to have lower pitching moments, milder stall, and lower drag characteristics. The difference between the two flow fields is striking, given the fact that the airfoil deformations are rather small.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Stall alleviation using a deformable leading edge concept


    Contributors:
    Sahin, M. (author) / Sankar, L.N. (author)


    Publication date :

    2000-01-01


    Size :

    513897 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Stall Alleviation using a Deformable Leading Edge Concept

    Sahin, M. / Sankar, L. N. / Institute of Electrical and Electronics Engineers | British Library Conference Proceedings | 2000


    Dynamic stall alleviation using a deformable leading edge concept - A numerical study

    Sahin, Mehmet / Sankar, Lakshmi / Chandrasekhara, M. et al. | AIAA | 2000


    Dynamic Stall Alleviation using a Deformable Leading Edge Concept - A Numerical Study

    Sahin, M. / Sankar, L. N. / Chandrasekhara, M. S. et al. | British Library Conference Proceedings | 2000



    Dynamic Stall Alleviation Using a Deformable Leading Edge ConceptA Numerical Study

    Mehmet Sahin / Lakshmi N. Sankar / M. S. Chandrasekhara et al. | AIAA | 2003