Rotor-Stator Interaction Analysis Using the Navier-Stokes Equations and a Multigrid Method

TitleRotor-Stator Interaction Analysis Using the Navier-Stokes Equations and a Multigrid Method
Publication TypeJournal Article
Year of Publication1996
AuthorsArnone A, Pacciani R
JournalASME Journal of Turbomachinery
Volume118
Issue4
Pagination679–689
Date Published10/1996
ISSN Number0889-504X
Other NumbersScopus 2-s2.0-0030450077
KeywordsDual Time Stepping, Multigrid
Abstract

A recently developed, time-accurate multigrid viscous 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. By means of a dual time-stepping approach, 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. The accelerating strategies include local time stepping, residual smoothing, and multigrid. Two-dimensional viscous calculations of unsteady rotor-stator interaction in the first stage of a modern gas turbine are presented. The stage analysis is based on the introduction of several blade passages to approximate the stator:rotor count ratio. Particular attention is dedicated to grid dependency in space and time as well as to the influence of the number of blades included in the calculations.

URLhttp://link.aip.org/link/?JTM/118/679/1
DOI10.1115/1.2840923