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Conjugate rotor-stator interaction procedure for film-cooled turbine sections

Joshua Gottlieb (Department of Mechanical and Aerospace Engineering, University of California , Davis, Davis, California, USA)
Roger Davis (Department of Mechanical and Aerospace Engineering, University of California , Davis, Davis, California, USA)
John Clark (Turbine Research, Air Force Research Laboratory , Wright-Patterson AFB, Ohio, USA)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 2 May 2017

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Abstract

Purpose

The authors aim to present a procedure for the parallel, steady and unsteady conjugate, Navier–Stokes/heat-conduction rotor-stator interaction analysis of multi-blade-row, film-cooled, turbine airfoil sections. A new grid generation procedure for multiple blade-row configurations, including walls, thermal barrier coatings, plenums, and cooling tubes, is discussed.

Design/methodology/approach

Steady, multi-blade-row interaction effects on the flow and wall thermal fields are predicted using a Reynolds’s-averaged Navier–Stokes (RANS) simulation in conjunction with an inter-blade-row mixing plane. Unsteady, aero-thermal interaction solutions are determined using time-accurate sliding grids between the stator and rotor with an unsteady RANS model. Non-reflecting boundary condition treatments are utilized in both steady and unsteady approaches at all inlet, exit and inter-blade-row boundaries. Parallelization techniques are also discussed.

Findings

The procedures developed in this research are compared against experimental data from the Air Force Research Laboratory’s turbine research facility.

Practical implications

The software presented in this paper is useful as both the design and analysis tool for fluid system and turbomachinery engineers.

Originality/value

This research presents a novel approach for the simultaneous solution of fluid flow and heat transfer in film-cooled rotating turbine sections. The software developed in this research is validated against experimental results for 2D flow, and the methods discussed are extendable to 3D.

Keywords

Acknowledgements

The authors would like to thank the managers at the Air Force Research Laboratory for their support of this effort under contract 09-S590-0009-20-C1.

Citation

Gottlieb, J., Davis, R. and Clark, J. (2017), "Conjugate rotor-stator interaction procedure for film-cooled turbine sections", Aircraft Engineering and Aerospace Technology, Vol. 89 No. 3, pp. 365-374. https://doi.org/10.1108/AEAT-10-2014-0159

Publisher

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Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited