Scale-resolving simulations of the flow in the Francis-99 turbine at part-load condition

Abstract In this paper, we investigate the formation of Rotating Vortex Rope (RVR) using scale-resolving methods, SAS and Wall-Modeled LES (WMLES). We compare results from these simulation methods with experimental data Francis-99 workshop. This comparison shows that general features RVR can be captured both methods. However, WMLES would lead to a better quantitative agreement between velocity profiles in draft tube experiment. The reasons for are discussed detail. A pressure fluctuations simulations experiment is also presented. all under-predict Root Mean Square (RMS) fluctuations, although RMS values predicted by closer values.