Multigrid Computations of Unsteady Rotor-Stator Interaction Using the Navier-Stokes Equations

[+] Author and Article Information
A. Arnone

Department of Energy Engineering, University of Florence, Via S. Marta, 3, 50139 Florence, Italy

R. Pacciani

Institute of Energetics, University of Perugia, Perugia, Italy

A. Sestini

Department of Energy Engineering, University of Florence, Florence, Italy

J. Fluids Eng 117(4), 647-652 (Dec 01, 1995) (6 pages) doi:10.1115/1.2817317 History: Received April 20, 1994; Revised February 17, 1995; Online December 04, 2007


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.

Copyright © 1995 by The American Society of Mechanical Engineers
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