Publications

An Accelerated 3D Navier–Stokes Solver for Flows in Turbomachines

Authors:

Tobias Brandvik; Graham Pullan

Publication:

J. Turbomach. 2010; 133(2):021025-021025-9.

DOI:

doi: 10.1115/1.4001192

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SBLOCK: A Framework for Efficient Stencil-Based PDE Solvers on Multi-core Platforms

Authors:

Tobias Brandvik; Graham Pullan

Publication:

Proc. IEEE CIT 2010

DOI:

10.1109/CIT.2010.214

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The Effect of Leading-Edge Geometry on Wake Interactions in Compressors

The effect of leading-edge geometry on the wake/boundary-layer interaction was studied in a low-speed single-stage HP compressor. Both a 3:1 elliptic and a circular leading edge were tested on a controlled diffusion aerofoil stator blade. Experiments were undertaken on the stator suction surface; these included hotwire boundary-layer traverses, surface hotfilm measurements, and high resolution leading-edge pressure measurements. Steady computational fluid dynamics (CFD) predictions were also performed to aid the interpretation of the results. The two leading-edge shapes gave rise to significantly different flows. For a blade with an elliptic leading edge (Blade A), the leading-edge boundary layer remained attached and laminar in the absence of wakes. The wake presence led to the formation of a thickened laminar boundary layer in which turbulent disturbances were observed to form. Measurements of the trailing-edge boundary layer indicated that the wake/leading-edge interaction for Blade

Authors:

A. P. S. Wheeler, A. Sofia and R. J. Miller

Publication:

Journal of Turbomachinery

DOI:

10.1115/1.3104617

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Acceleration of a 3D Euler Solver Using Commodity Graphics Hardware

Authors:

Tobias Brandvik; Graham Pullan

Publication:

AIAA 2008-607

DOI:

10.2514/6.2008-607

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The Influence of Sweep on Axial Flow Turbine Aerodynamics in the Endwall Region

Authors:

Graham Pullan; Neil W. Harvey

Publication:

J. Turbomach. 2008; 130(4):041011-041011-10.

DOI:

10.1115/1.2812337

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Acceleration of a two-dimensional Euler flow solver using commodity graphics hardware

Authors:

Tobias Brandvik; Graham Pullan

Publication:

Proc. IMechE, Part C: Volume: 221 issue: 12, page(s): 1745-1748

DOI:

10.1243/09544062JMES813FT

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The effect of wake induced structures on compressor boundary-layers

The interaction of a convected wake with a compressor blade boundary layer was investigated. Measurements within a single-stage compressor were made using an endoscopic PIV system, a surface mounted pressure transducer, hotfilms and hotwire traverses, along with CFD simulations. The wake/leading-edge interaction was shown to lead to the formation of a thickened laminar boundary-layer, within which turbulent spots formed close to the leading edge. The thickened boundary-layer became turbulent and propagated down the blade surface, giving rise to pressure perturbations of 7% of the inlet dynamic head in magnitude. The results indicate that wake/leading-edge interactions have a crucial role to play in the performance of compressor blades in the presence of wakes.

Authors:

Andrew P. Wheeler, Robert J. Miller and Howard P. Hodson

Publication:

Journal of Turbomachinery

DOI:

10.1115/1.2720499

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The Importance of Shroud Leakage Modeling in Multistage Turbine Flow Calculations

Authors:

Budimir Rosic; John D. Denton; Graham Pullan

Publication:

J. Turbomach. 2005; 128(4):699-707.

DOI:

10.1115/1.2181999

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The Interaction of Turbine Inter-Platform Leakage Flow With the Mainstream Flow

Authors:

Kevin Reid; John Denton; Graham Pullan; Eric Curtis; John Longley

Publication:

J. Turbomach. 2005; 129(2):303-310.

DOI:

10.1115/1.2162592

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Improving the Performance of a Turbine With Low Aspect Ratio Stators by Aft-Loading

Authors:

Graham Pullan; John Denton; Eric Curtis

Publication:

J. Turbomach. 2004; 128(3):492-499.

DOI:

10.1115/1.2182000

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