Scale-resolving simulations of the flow in the Francis-99 turbine at part-load condition
Paper in proceeding, 2022

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

Author

Mohammad Hossein Arabnejad Khanouki

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

Håkan Nilsson

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Rickard Bensow

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

IOP Conference Series: Earth and Environmental Science

17551307 (ISSN) 17551315 (eISSN)

Vol. 1079 1 012085

31st IAHR Symposium on Hydraulic Machinery and Systems
Trondheim, Norway,

Unsteady flow and cavitation during off-design and transients in water turbines

Chalmers, 2021-10-01 -- 2022-12-31.

Svenskt Vattenkraftcentrum (2018-2022), 2021-10-01 -- 2022-12-31.

Energiforsk AB (VKU14164), 2021-10-01 -- 2022-12-31.

Driving Forces

Sustainable development

Subject Categories

Applied Mechanics

Energy Engineering

Fluid Mechanics and Acoustics

Areas of Advance

Energy

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1088/1755-1315/1079/1/012085

More information

Latest update

11/24/2022