A parallel multiblock Navier-Stokes solver with the turbulence model is used to solve the unsteady flow through an annular turbine cascade, the transonic Standard Test Case 4, Test 628. Computations are performed on a two- and three-dimensional model of the blade row with either the Euler or the Navier-Stokes flow models. Results are compared to the experimental measurements. Comparisons of the unsteady surface pressure and the aerodynamic damping are made between the three-dimensional, two-dimensional, inviscid, viscous simulations, and experimental data. Differences are found between the stability predictions by the two- and three-dimensional computations, and the Euler and Navier-Stokes computations due to three-dimensionality of the cascade model and the presence of a boundary layer separation, respectively.
Prediction of Flutter of Turbine Blades in a Transonic Annular Cascade
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McBean, I., Hourigan, K., Thompson, M., and Liu, F. (May 29, 2005). "Prediction of Flutter of Turbine Blades in a Transonic Annular Cascade." ASME. J. Fluids Eng. November 2005; 127(6): 1053–1058. https://doi.org/10.1115/1.2060731
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