Multigrid computations of unsteady rotor-stator interaction using the Navier-Stokes equations
- Univ. of Florence (Italy). Dept. of Energy Engineering
- Univ. of Perugia (Italy). Inst. of Energetics
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.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 194274
- Journal Information:
- Journal of Fluids Engineering, Journal Name: Journal of Fluids Engineering Journal Issue: 4 Vol. 117; ISSN 0098-2202; ISSN JFEGA4
- Country of Publication:
- United States
- Language:
- English
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