Computation of multi-passage cascade flows with overset and deforming grids


Tuncer İ. H. , Sanz W.

Proceedings of the 1997 International Gas Turbine & Aeroengine Congress & Exposition, Orlando, FL, USA, 2 - 05 June 1997 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • City: Orlando, FL, USA
  • Middle East Technical University Affiliated: Yes

Abstract

An overset grid method is applied to the solution of single and multi-passage cascade flows with a compressible Navier-Stokes solver. C-type grids around individual blades are overset onto a Cartesian background grid. Overset grids are allowed to move in time relative to each other as prescribed by the oscillatory plunging motion. The overset grid method uses a simple, robust numerical algorithm to localize moving boundary points and to interpolate solution variables across intergrid boundaries. Computational results and comparisons with single/staggered, deforming grid solutions are presented for in- and out-of-phase multi-passage flows through a compressor cascade. Very good agreement is obtained against the deforming grid solutions.