Influence wave mode computations of multi-passage cascade flows

TUNCER İ. H., Weber S.

ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000, Munich, Germany, 8 - 11 May 2000, vol.4 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 4
  • Doi Number: 10.1115/2000-gt-0415
  • City: Munich
  • Country: Germany
  • Middle East Technical University Affiliated: Yes


Copyright © 2000 by ASME.A Navier-Stokes solution method with overset grids is employed to compute the Influence Wave Modes of a compressor cascade in transonic flow conditions. The computed predictions are compared against the experimental data and the predictions based on Traveling Wave Mode computations performed using a different Navier-Stokes solver. In the present method, a five-passage flow domain is discretized with O-type subgrids around each blade and a rectangular background subgrid, A simple, robust numerical algorithm is used to localize moving intergrid boundary points, and to interpolate solution variables across the subgrids. The influence wave mode computation predicts a strong influence of the pitching mid-blade on the shock position of the neighboring blades. The predictions agree with the experimental data fairly well, and shows an improvement over the Traveling Wave Mode predictions.