Multigrid Computations of Unsteady Rotor-Stator Interaction Using the Navier-Stokes Equations
- 1 December 1995
- journal article
- research article
- Published by ASME International in Journal of Fluids Engineering
- Vol. 117 (4) , 647-652
- https://doi.org/10.1115/1.2817317
Abstract
A Navier-Stokes time-accurate solver has been extended to the analysis of unsteady rotor-stator interaction. In the proposed method, a fully-implicit time discretization is used to remove stability limitations. A four-stage Runge-Kutta scheme is used in conjunction with several accelerating techniques typical of steady-state solvers, instead of traditional time-expensive factorizations. Those accelerating strategies include local time stepping, residual smoothing, and multigrid. Direct interpolation of the conservative variables is used to handle the interfaces between blade rows. Two-dimensional viscous calculations of unsteady rotor-stator interaction in a modern gas turbine stage are presented to check for the capability of the procedure.Keywords
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