Unsteady Flow Simulation in an Axial Flow Turbine Using a Parallel Implicit Navier-Stokes Method

Alexander R. Jung, Jürgen F. Mayer and Heinz Stetter
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Alexander R. Jung: Universität Stuttgart, Institut für Thermische Strömungsmaschinen und Maschinenlaboratorium
Jürgen F. Mayer: Universität Stuttgart, Institut für Thermische Strömungsmaschinen und Maschinenlaboratorium
Heinz Stetter: Universität Stuttgart, Institut für Thermische Strömungsmaschinen und Maschinenlaboratorium

A chapter in High Performance Computing in Science and Engineering ’98, 1999, pp 269-294 from Springer

Abstract: Abstract The unsteady flow in an axial flow turbine stage with a second stator blade row is investigated by means of a Navier-Stokes code especially developed for turbomachinery applications. Due to the low aspect ratio of the blades of the test machine a highly three-dimensional flow dominated by secondary flow structures is observed. Simulations that include all blade rows are carried out. The present investigation focuses on the stator/rotor/stator interaction effects. Secondary flow structures and their origins are identified and tracked on their way through the passage. The time-dependent secondary velocity vectors and total pressure distributions as well as flow angles and Mach number distributions as perturbation from the time-mean flow field are shown in cross-flow sections and azimuthal cuts throughout the turbine. Simulations and measurements show a good overall agreement in the time-dependent flow behaviour as well as in the secondary flow structures.

Keywords: Secondary Flow; Flow Angle; Passage Vortex; Stator Blade; Trail Edge Vortex (search for similar items in EconPapers)
Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-58600-2_28

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DOI: 10.1007/978-3-642-58600-2_28

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