Numerical Simulation of Wake Passing on Turbine Cascades

Yildirim Suzen, George Huang
2003 41st Aerospace Sciences Meeting and Exhibit   unpublished
The numerical simulations for two sets of unsteady wake/blade interaction experiments are performed. The first experiment considered was conducted by Kaszeta et al. (2001) to study the effects of periodically passing wakes on transition and separation in a low pressure turbine passage. The second set of experiments considered are the linear turbine cascade experiments of Schobeiri and Pappu (1997) which were conducted to investigate the unsteady boundary layer behavior on a NASA Space Shuttle
more » ... in Engine (SSME) turbine blade cascade. In both experiments, moving cylindrical rods are used to mimic the periodically passing wakes upstream of the flows. The numerical simulations are performed for both sets of experiments using a recently developed multi-block Navier-Stokes solver which is capable of handling complex geometries, overset, and moving grids while featuring MPI. Results of fully turbulent computations are presented along with the experimental data. Although comparison with experiment indicates that the general features of unsteady wake/blade interactions are captured with a fully turbulent simulation, it is evident that without taking flow transition into consideration, the flow separation near the trailing edge of the blade can not be predicted.
doi:10.2514/6.2003-1256 fatcat:nwskhlbhn5goljtbfs2gvrx4tm