Calculation of the VKI turbine blade with LES and DES

<正> The prediction of the laminar to turbulent transition is essential in the calculation of turbine blades,compressorblades or airfoils of airplanes since a non negligible part of the flow field is laminar or transitional.In this paperwe compare the prediction capability of the Detached Eddy Simulation(DES)with the Large Eddy Simulation(LES)using the high-pass filtered(HPF)Smagorinsky model(Stolz et at.[1])when applied to the calculation oftransitional flows on turbine blades.Detailed measurements from Canepa et al.[2]of the well known VKI-turbineblade served to compare our results with the experiments.The calculations have been made on a fraction of theblade(10%)using non-reflective boundary conditions of Freund at the inlet and outer plane extended to internalflows by Magagnato et al.[3]in combination with the Synthetic Eddy Method(SEM)proposed by Jarrin et at.[4].The SEM has also been extended by Pritz et al.[5] for compressible flows.It has been repeatedly shown that hy-brid approaches can satisfactorily predict flows of engineering relevance.In this work we wanted to investigate ifthey can also be used successfully in this difficult test case.