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Numerical modelling of bypass transition in turbine cascades
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SYSNO ASEP 0451430 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Numerical modelling of bypass transition in turbine cascades Author(s) Louda, P. (CZ)
Příhoda, Jaromír (UT-L) RID, ORCID
Kozel, K. (CZ)Source Title The 16th International Conference on Fluid Flow Technologies. - Budapest : Budapest University of Technology and Economics, 2015 Number of pages 7 s. Publication form Medium - C Action International Conference on Fluid Flow Technologies/16./ Event date 01.09.2015-04.09.2015 VEvent location Budapest Country HU - Hungary Event type EUR Language eng - English Keywords 3D turbine cascade ; bypass transition model ; EARSM turbulence model Subject RIV BK - Fluid Dynamics R&D Projects GAP101/12/1271 GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 Annotation The work deals with numerical simulation of turbulent flows in turbine cascades taking into account transition to turbulence. The mathematical model is based on Favre-averaged Navier-Stokes equations closed by a turbulence model. The transition to turbulence is modelled by 2-equation model of Lodefier and Dick (2006) solving equations for intermittency and free-stream factor. In the model, arbitrary transition criteria based on empirical correlations can be used. The turbulence model is the EARSM (explicit algebraic Reynolds stress model). The results are shown for 3D turbine cascade with prismatic geometry and side walls. Fully turbulent and transitional simulations are compared. The implementation of the transition model in the multi-block grids enabling computation of boundary layer thickness and free-stream velocity and turbulence is discussed. The numerical method uses the implicit finite volume solver with the AUSM-type scheme. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2016
Number of the records: 1