Papers Published

  1. Mahajan, Aparajit J. and Bakhle, Milind A. and Dowell, Earl H., Efficient procedure for cascade aeroelastic stability determination using nonlinear, time-marching aerodynamic solvers, Collection of Technical Papers - AIAA/ASME Structures, Structural Dynamics and Materials Conference no. pt 5 (1993), pp. 2856 - 2866 .
    (last updated on 2007/04/10)

    A numerical eigenvalue problem formulation and a practical calculation procedure for exact eigenvalues and corresponding eigenvectors are developed and applied to a nonlinear, two-dimensional, time-marching full potential solver for cascade aeroelastic stability analysis. This procedure is based on the Lanczos recursive method and it directly calculates stability information about a nonlinear steady state. It is compared to conventional approaches in the frequency and time domains developed earlier and is found to be 100-10.000 times more computationally efficient. Eigenvalue constellations and the flutter results for flow through a cascade SR5 propfan airfoil are presented.

    Cascades (fluid mechanics);Airfoils;Eigenvalues and eigenfunctions;Stability;Recursive functions;Flutter (aerodynamics);Mathematical models;Time domain analysis;Frequency domain analysis;