Transitional flow simulation in turbomachinery with a high-order accurate method

Various methods have been proposed in the finite volume context to predict the laminar-turbulent transition, but, according to the literature, not yet in the high-order context. We considered the transition model proposed by Kožulović and Lapworth (2009), which is integral, non-local and based upon experimental correlations. All the relevant modes of transition were taken into account. We implemented this model into a high-order accurate discontinuous Galerkin (DG) method with implicit time integration to solve the RANS equations coupled with the k - w turbulence model. The model was applied to two test cases, namely the flat plate (T3A configuration) and the T106A turbine cascade. Results obtained with and without transition model were compared with experimental data. The transition model seems to be a necessary feature to predict correctly these flow fields.