Detailed experimental measurements have been performed to understand the effects of turbine inlet temperature distortion (hot-streaks) on the heat transfer and aerodynamic characteristics of a full-scale unshrouded high pressure turbine stage at flow conditions that are representative of those found in a modern gas turbine engine. To investigate hot-streak migration, the experimental measurements are complemented by three-dimensional steady and unsteady CFD simulations of the turbine stage. This paper presents the time-averaged measurements and computational predictions of rotor blade surface and rotor casing heat transfer. Experimental measurements obtained with and without inlet temperature distortion are compared. Time-mean experimental measurements of rotor casing static pressure are also presented. CFD simulations have been conducted using the Rolls-Royce code HYDRA and are compared with the experimental results. The test turbine was the unshrouded MT1 turbine, installed in the Turbine Test Facility (previously called Isentropic Light Piston Facility) at QinetiQ, Farnborough, UK. This is a short duration transonic facility, which simulates engine-representative M, Re, Tu, , and to the turbine inlet. The facility has recently been upgraded to incorporate an advanced second-generation temperature distortion generator, capable of simulating well-defined, aggressive temperature distortion both in the radial and circumferential directions, at the turbine inlet.
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January 2012
Research Papers
Effect of Temperature Nonuniformity on Heat Transfer in an Unshrouded Transonic HP Turbine: An Experimental and Computational Investigation
Imran Qureshi,
Imran Qureshi
Department of Engineering Science,
e-mail: imran.qureshi@eng.ox.ac.uk
University of Oxford
, Parks Road, Oxford OX1 3PJ, UK
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Andy D. Smith,
Andy D. Smith
Rolls-Royce PLC
, Turbine Sub-Systems, Moor Lane, Derby DE24 8BJ, UK
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Kam S. Chana,
Kam S. Chana
QinetiQ Limited
, Cody Technology Park, Farnborough GU14 0LX, UK
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Thomas Povey
Thomas Povey
Department of Engineering Science,
University of Oxford
, Parks Road, Oxford OX1 3PJ, UK
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Imran Qureshi
Department of Engineering Science,
University of Oxford
, Parks Road, Oxford OX1 3PJ, UKe-mail: imran.qureshi@eng.ox.ac.uk
Andy D. Smith
Rolls-Royce PLC
, Turbine Sub-Systems, Moor Lane, Derby DE24 8BJ, UK
Kam S. Chana
QinetiQ Limited
, Cody Technology Park, Farnborough GU14 0LX, UK
Thomas Povey
Department of Engineering Science,
University of Oxford
, Parks Road, Oxford OX1 3PJ, UKJ. Turbomach. Jan 2012, 134(1): 011005 (12 pages)
Published Online: May 25, 2011
Article history
Received:
July 1, 2010
Revised:
July 4, 2010
Online:
May 25, 2011
Published:
May 25, 2011
Citation
Qureshi, I., Smith, A. D., Chana, K. S., and Povey, T. (May 25, 2011). "Effect of Temperature Nonuniformity on Heat Transfer in an Unshrouded Transonic HP Turbine: An Experimental and Computational Investigation." ASME. J. Turbomach. January 2012; 134(1): 011005. https://doi.org/10.1115/1.4002987
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