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	Kostas MARAKKOS
Supervisor	Dr.John T. TURNER
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e-mail	Konstantinos.Marakkos@stud.man.ac.uk
Title of Project	Experimental Study of the 3-dimensional flow over gas turbine support struts using laser anemometry.
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Flownormal to the axis of the strut and wall effects are dominant. Thisflow is characterised by strong three-dimensionality. Threedimensional flow structures such as the horseshoe vortices formed at each endwall lead to additional losses.

ENGINEERING IMPORTANCE Moderndesign tools used in gas turbine industries, such as Rolls Royce, involve numerical methods and CFD codes. The requirement is to minimise these losses and increase the efficiency of the gas turbine engine.

OBJECTIVE The necessity is, therefore, that a valid database exists, so that computational predictions of the secondary losses can be validated. The experimental results are to be obtained using Particle Image Velocimetry (PIV). PIV, which is the most advanced form of lazer-based instrumentation, can yield instantaneous parameters such as instantaneous velocities and vorticity.

CURRENT WORK involves the experimental study of cross flow over a cylinder. Flow visualisation and surface flow visualisation to study the horseshoe vortex at the endwall. Preliminary PIV results on velocities and vorticity of the horseshoe vortex.

FUTURE WORK Refinethe above studies. Repeattests but with a larger aspect ratio (same as a gas turbine strut). Repeattests for a turbine strut.