Heat Transfer Measurements to a Gas Turbine Cooling Passage With Inclined Ribs

Author:

Wang Z.1,Ireland P. T.2,Kohler S. T.3,Chew J. W.3

Affiliation:

1. Ellison Surface Technologies, Inc., 1780 Anderson Blvd., Hebron, KY 41048

2. Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, United Kingdom

3. Rolls Royce plc, P.O. Box 3, Filton, Bristol, BS12 7QE, United Kingdom

Abstract

The local heat transfer coefficient distribution over all four walls of a large-scale model of a gas turbine cooling passage have been measured in great detail. A new method of determine the heat transfer coefficient to the rib surface has been developed and the contribution of the rib, at 5 percent blockage, to the overall roughened heat transfer coefficient was found to be considerable. The vortex-dominated flow field was interpreted from the detailed form of the measured local heat transfer contours. Computational Fluid Dynamics calculations support this model of the flow and yield friction factors that agree with measured values. Advances in the heat transfer measuring technique and data analysis procedure that confirm the accuracy of the transient method are described in full.

Publisher

ASME International

Subject

Mechanical Engineering

Reference17 articles.

1. Andrews, G. E., Asere, A. A., Hussain, C. I., Mkpadi, M. C., and Nazadi, A., 1992, “Impingement/Effusion Cooling,” AGARD CP-527, Paper No. 30.

2. Chew, J. W., Taylor, I. J., and Bonsell, J. J., 1996, “CFD Developments for Turbine Blade Heat Transfer,” Presented at the 3rd International Conf. on Computers in Reciprocating Engines, I. Mech. E., London, 9–10 Jan., Paper No. C499-035.

3. Clifford, R. J., Jones, T. V., and Dunne, S. T., 1983, “Techniques for Obtaining Detailed Heat Transfer Coefficient Measurements Within Gas Turbine Blades and Vane Cooling Passages,” ASME Paper No. 83-GT-58.

4. Florschuetz, L. W., Metzger, D. E., and Truman, C. R., 1981, “Jet Array Impingement With Crossflow-Correlation of Streamwise Resolved Flow and Heat Transfer Distributions,” NASA CR 3373.

5. Gillespie D. R. H. , WangZ., IrelandP. T., and KohlerS. T., 1998, “Full Surface Local Heat Transfer Coefficient Measurements in an Integrally Cast Impingement Cooling Geometry,” ASME JOURNAL OF TURBOMACHINERY, Vol. 120, this issue, pp. 92–99.

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