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Numerical solution of compressible flow through a turbine cascade using various transition models
Nádvorník, M. ; Straka, P. ; Příhoda, Jaromír
The contribution deals with the numerical simulation of 2D compressible flow through a linear turbine blade cascade. Simulations were carried out by the in-house numerical code based on the two-equation k-omega turbulence model with the algebraic transition model and by the commercial software Fluent using the three-equation turbulence model including the transition model proposed by Walters and Cokljat. Predictions carried out for different Reynolds and Mach numbers cover the transition in the attached and separated flow as well. Predicted values of the loss coefficient and the flow outlet angle were compared with experimental data for the turbine cascade VS33.
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Aerodynamics tests of a transonic turbine blade cascade model consisting of low number of blades
Šimurda, David ; Luxa, Martin ; Šafařík, Pavel ; Synáč, J.
Contribution is concerned with experimental investigation of the transonic turbine blade cascade aerodynamic characteristics. Due to specific geometry of the blade cascade, the blade cascade model consists of six blades only. Therefore, special experimental setup is adopted and its influence on the resultant blade cascade aerodynamic characteristics is discussed. Experimental data are obtained applying both optical (interferometry, schlieren technique) and pneumatic methods (mainly traversing with a five-hole conical probe). Special attention is paid to flow structures, which significantly contribute to the increase of kinetic energy loss coefficient. Results of current investigation are compared to former results obtained at usual experimental set-up.
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