Multigrid computations of unsteady rotor-stator interaction using the Navier-Stokes equations

Journal Article · Fri Dec 01 00:00:00 EST 1995 · Journal of Fluids Engineering

DOI:https://doi.org/10.1115/1.2817317· OSTI ID:194274

Sestini, A ^[1]; Pacciani, R ^[2]

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1. Univ. of Florence (Italy). Dept. of Energy Engineering
2. 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, Vol. 117, Issue 4; Other Information: PBD: Dec 1995
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
20 FOSSIL-FUELED POWER PLANTS
GAS FLOW
RUNGE-KUTTA METHOD
ROTORS
STATORS
TURBOMACHINERY