Unsteady Simulation of a Transonic Turbine Stage with Focus on Turbulence Prediction

Wolfgang Sanz*, David Scheier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The flow in a transonic turbine stage still poses a high challenge for the correct prediction of turbulence using an eddy viscosity model. Therefore, an unsteady RANS simulation with the k-ω SST model, based on a preceding study of turbulence inlet conditions, was performed to see if this can
improve the quality of the flow and turbulence prediction of an experimentally investigated turbine flow. Unsteady Q3D results showed that none of the different turbulence boundary conditions could predict the free-stream turbulence level and the maximum values correctly. Luckily, the influence
of the boundary conditions on the velocity field proved to be small. The qualitative prediction of the complex secondary flows is good, but there is lacking agreement in the prediction of turbulence generation and destruction
Original languageEnglish
Article number36
JournalInternational Journal of Turbomachinery, Propulsion and Power
Issue number3
Publication statusPublished - Sep 2021
Event14th European Turbomachinery Conference - Virtuell, Poland
Duration: 12 Apr 202116 Apr 2021


  • Secondary flow
  • Transonic turbine stage
  • Turbulence boundary conditions
  • Turbulence prediction
  • Unsteady flow simulation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering
  • Energy Engineering and Power Technology


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