Prediction of Cascade Performance Using an Incompressible Navier-Stokes Technique

Presented at the Gas Turbine and Aeroengine Congress and Exposition—June 11-14, 1990—Brussels, BelgiumA fully elliptic, control volume solution of the two—dimensional incompressible Navier—Stokes equations for the prediction of cascade performance over a wide incidence range is presented in this paper. The numerical technique is based on a new pressure substitution method. A Poisson equation is derived from the pressure weighted substitution of the full momentum equations into the continuity equation. The analysis of a double circular are compressor cascade is presented, and the results are compared with the available experimental data at various incidence angles. Good agreement is obtained for the blade pressure distribution, boundary layer and wake profiles, skin friction coefficient, losses and outlet angles. Turbulence effects are simulated by the Low—Reynolds—Number version of the k —E turbulence model.National Aeronautics and Space AdministrationJohn von Neumann Supercomputer Center (Princeton) grant NAC 817National Aeronautics and Space Administration grant NSG 326