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Numerical Simulations of Steady and Unsteady Transition in Low-Pressure Turbine Blade RowsTransition plays an important role in the prediction of losses and performance in low-pressure turbines. The transition location on a turbine blade may vary significantly because of the wakes from upstream blade rows, and intermittent flow separation can also affect the transition process in an unsteady flow environment. In the present investigation, an unsteady Navier-Stokes analysis is used to predict transition in a low-pressure turbine cascade and a low-pressure turbine stage. The numerical flow analysis is third-order spatially accurate and second-order temporally accurate, and the equations of motion are integrated using an implicit time-marching procedure. The Baldwin-Lomax and k-epsilon turbulence models, in conjunction with several algebraic transition models, have been used to predict the location of transition. Predicted results include unsteady blade loadings, time-histories of the pressure, transition locations and boundary layer quantities, as well as performance quantities and comparisons with the available experimental/design data.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Dorney, Daniel
(General Motors Inst. Flint, MI United States)
Date Acquired
August 18, 2013
Publication Date
June 1, 1998
Publication Information
Publication: Minnowbrook II 1997 Workshop on Boundary Layer Transition in Turbomachines
Subject Category
Fluid Mechanics And Heat Transfer
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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