Analysis of the turbulent wake of a cascade airfoil

The structure of the wake in an incompressible, turbulent fluid behind an airfoil in a cascade is investigated. Boundary-layer equations containing longitudinal curvature terms are applied to the problem, and the similarity properties of the equations are developed. Local similarity solutions are determined for mean velocity profiles at several wake positions, and these results are compared with experimental data for two incidence angles. Good correlation between theory and experiment is obtained beyond approximately a tenth of a chord downstream of the airfoil at small incidence angles.