National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Simulation of Transonic Flow Through a Mid-Span Turbine Blade Cascade with the Separation-Induced Transition
Straka, P. ; Příhoda, Jaromír ; Fenderl, D.
The paper deals with the numerical simulation of the transonic flow through a mid-span turbine blade cascade by means of an in-house code based on the EARSM turbulence model of Hellsten [1] completed by the algebraic transition model of Straka and Příhoda [2]. The simulation using the transition model of Langtry and Menter [3] and Menter et al. [4] implemented in the commercial code ANSYS Fluent was used for the comparison. Simulations were carried out for the transonic regime close to the nominal regime. The flow separation on the suction side of the blade is caused by the interaction of the reflected shock wave with the boundary layer. The attention was focused on the modelling of the transition in the separated flow especially on the modelling of the length of the transition region. Numerical results were compared with experimental results.
Some results of simulations of flows with internal permeable walls
Louda, Petr
The work deals with the numerical modelling of compressible flow in a domain containing permeable walls in its interior, i.e. submerged in the fluid. The aim is to exclude direct simulation and find a model approximating the flow through a permeable plate driven by the static pressure difference between the sides of the wall. The numerical experiments so far enable to understand better forming of parasitic wave structures in the measuring section of the wind tunnel. The model of permeable wall needs further verification.
Simulation of Compressible Flow Through the Tip-Section Turbine Blade Cascade with the Unsteady Interaction of the Shock wave with Shear Layers
Straka, P. ; Příhoda, Jaromír ; Bobčík, M.
The contribution deals with the numerical simulation of compressible ow through the tip- section turbine blade cascade with the supersonic inlet boundary conditions. The simulation was carried out by the in-house numerical code using the explicit algebraic Reynolds stress model completed by the bypass transition model with the algebraic equation for the inter- mittency coefficient. The simulation was focused particularly on the shock-wave/boundary layer interaction resulting in combination of the bypass-transition and the separation induced transition.

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