A study of a large-scale model of an engine representative impingement cooling system has been performed. A series of tests were carried out to characterize the behavior of the system fully. These included cold flow diagnostic tests to determine the pressure loss and the static pressure distribution, and flow visualization to assess surface shear. The surface shear stress pattern provided by multiple stripes of colored paint applied to the target surface yielded important information on the near-wall flow features far from the jet axis. The row solved flow and pressure distributions are compared to industry standard predictions. Heat transfer tests using the transient liquid crystal technique were also conducted using coatings comprised of a mixture of three thermochromic liquid crystals. Analysis of the thermochromic liquid crystal data was enhanced by recent developments in image processing. In addition, an energy balance analysis of signals from fast-response thermocouples for air temperature measurement was applied to verify the levels of heat transfer coefficients on surfaces not coated with the temperature-sensitive liquid crystal.
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e-mail: changmin.son@eng.ox.ac.uk
e-mail: david.gillespie@eng.ox.ac.uk
e-mail: peter.ireland@eng.ox.ac.uk
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January 2001
Technical Papers
Heat Transfer and Flow Characteristics of an Engine Representative Impingement Cooling System
Changmin Son,
e-mail: changmin.son@eng.ox.ac.uk
Changmin Son
Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
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David Gillespie,
e-mail: david.gillespie@eng.ox.ac.uk
David Gillespie
Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
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Peter Ireland,
e-mail: peter.ireland@eng.ox.ac.uk
Peter Ireland
Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
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Geoffrey M. Dailey
Geoffrey M. Dailey
Rolls-Royce plc, Derby, DE24 8BJ, United Kingdom
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Changmin Son
Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
e-mail: changmin.son@eng.ox.ac.uk
David Gillespie
Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
e-mail: david.gillespie@eng.ox.ac.uk
Peter Ireland
Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
e-mail: peter.ireland@eng.ox.ac.uk
Geoffrey M. Dailey
Rolls-Royce plc, Derby, DE24 8BJ, United Kingdom
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-219. Review Chair: D. Ballal.
J. Turbomach. Jan 2001, 123(1): 154-160 (7 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
Son, C., Gillespie, D., Ireland, P., and Dailey, G. M. (February 1, 2000). "Heat Transfer and Flow Characteristics of an Engine Representative Impingement Cooling System ." ASME. J. Turbomach. January 2001; 123(1): 154–160. https://doi.org/10.1115/1.1328087
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