Abstract
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
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 language | English |
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Article number | 36 |
Journal | International Journal of Turbomachinery, Propulsion and Power |
Volume | 6 |
Issue number | 3 |
DOIs | |
Publication status | Published - Sept 2021 |
Event | 14th European Turbomachinery Conference - Virtuell, Poland Duration: 12 Apr 2021 → 16 Apr 2021 |
Keywords
- 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