Simulation of flow over high-lifted turbine cascade at low Reynolds numbersстатья
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Аннотация:This paper is dedicated to the simulation of flow in the T106C high loaded turbine
cascade. A presence of a laminar-turbulent transition at the suction side of the blade caused by
the separation of the boundary layer leads to a significant increase in kinetic energy losses.
Predictions using both RANS and scale-resolving methods are carried out. The RANS
computations are performed by the SST and BSL-EARSM models with Abu-Ghannam and
Shaw criterion of laminar-turbulent transition or the − 𝑅𝑒̃𝜃𝑡 model with different closing
correlation dependencies. The hybrid RANS-LES IDDES method is used for scale-resolving
simulations. The validation is done by comparing the numerical results with the experimental
data on the isentropic Mach number along the blade surface and the relative total pressure losses
at different Reynolds numbers. The RANS and IDDES results are comparatively analyzed. A
strong dependence of all the numerical results on the incoming turbulent flow conditions is
observed.