Variable-Domain Variational Finite Element Solution of I_A Inverse Problem of 2-D Unsteady Compressible Flow around Oscillating Airfoils

摘要

In this paper, on the basis of the variational principles developed the finite element method 9FEM0 is employed for numerical solution of the inverse pro blem of 2-D unsteady compressibly flow around oscillating airfoils by incorporating the non-reflecting far-field boundary conditions and a new unsteady Kutta condition. All unknown boundary (airfoil contour) and discontinuities(shocks and free trailing vortex sheets0 are determined via the func- tional variation with variable domain and artificial density concept.