In this study, the evolution of the unsteady trailing edge vortex street downstream a linear turbine cascade is experimentally and computationally investigated. In a transonic cascade test stand, Laser Doppler velocimeter (LDV) measurements were acquired in several axial planes downstream of the blade trailing edge. In addition, direct detection of density changes near the trailing edge provide information about the frequency of a vortex shedding cycle.

A two-dimensional upwind-biased Navier-Stokes solver has then been used to perform a series of steady and unsteady cascade simulations, allowing an in-depth study into the mechanisms of the trailing edge vortex shedding.

The numerical results are compared with the experimental data to test the quality of the numerical simulations.

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