Simulation of the Transitional Flow in a Low Pressure Gas Turbine Cascade With a High Order Discontinuous Galerkin Method

Abstract

In the last decade, discontinuous Galerkin (DG) methods have been the subject of extensive research efforts because of their excellent performance in the highorder accurate discretization of advectiondiffusion problems on general unstructured grids, and are nowadays finding use in several different applications. In this paper, the potential offered by a highorder accurate DG space discretization method with implicit time integration for the solution of the Reynoldsaveraged Navier–Stokes equations coupled with the kد‰ turbulence model is investigated in the numerical simulation of the turbulent flow through the wellknown T106A turbine cascade. The numerical results demonstrate that, by exploiting high order accurate DG schemes, it is possible to compute accurate simulations of this flow on very coarse grids, with both the highReynolds and lowReynolds number versions of the kد‰ turbulence model.