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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.
The prediction of the laminar to turbulent transition is essential in the calculation of turbine blades, compressor blades or airfoils of airplanes since a non negligible part of the flow field is laminar or transitional. In this paper we compare 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 of transitional flows on the turbine blades. 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 [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 approache s can satisfactorily predict flows of engineering relevance.In this work we wanted to investigate if the can also be used successfully in this difficult test case.