Research Papers

Development of a Steady-State Experimental Facility for the Analysis of Double-Wall Effusion Cooling Geometries

[+] Author and Article Information
Alexander V. Murray

Department of Engineering Science,
University of Oxford,
Oxford OX1 3PJ, UK
e-mail: alexander.murray@eng.ox.ac.uk

Peter T. Ireland

Department of Engineering Science,
University of Oxford,
Oxford OX1 3PJ, UK
e-mail: peter.ireland@eng.ox.ac.uk

Eduardo Romero

Turbine Systems,
Rolls-Royce plc.,
Bristol BS34 7QE, UK
e-mail: eduardo.romero@rolls-royce.com

1Corresponding author.

Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received September 22, 2018; final manuscript received October 15, 2018; published online January 21, 2019. Editor: Kenneth Hall.

J. Turbomach 141(4), 041008 (Jan 21, 2019) (10 pages) Paper No: TURBO-18-1265; doi: 10.1115/1.4041751 History: Received September 22, 2018; Revised October 15, 2018

The continuous drive for ever higher turbine entry temperatures is leading to considerable interest in high performance cooling systems which offer high cooling effectiveness with low coolant utilization. The double-wall system is an optimized amalgamation of more conventional cooling methods including impingement cooling, pedestals, and film cooling holes in closely packed arrays characteristic of effusion cooling. The system comprises two walls, one with impingement holes, and the other with film holes. These are mechanically connected via pedestals allowing conduction between the walls while increasing coolant-wetted area and turbulent flow. However, in the open literature, experimental data on such systems are sparse. This study presents a new experimental heat transfer facility designed for investigating double-wall systems. Key features of the facility are discussed, including the use of infrared thermography to obtain overall cooling effectiveness measurements. The facility is designed to achieve Reynolds and Biot (to within 10%) number similarity to those seen at engine conditions. The facility is used to obtain overall cooling effectiveness measurements for a circular pedestal, double-wall test piece at three coolant mass-flows. A conjugate computational fluid dynamics (CFD) model of the facility was developed providing insight into the internal flow features. Additionally, a computationally efficient, decoupled conjugate method developed by the authors for analyzing double-wall systems is run at the experimental conditions. The results of the simulations are encouraging, particularly given how computationally efficient the method is, with area-weighted, averaged overall effectiveness within a small margin of those obtained from the experimental facility.

Copyright © 2019 by ASME
Your Session has timed out. Please sign back in to continue.


Murray, A. V. , Ireland, P. T. , and Rawlinson, A. J. , 2017, “ An Integrated Conjugate Computational Approach for Evaluating the Aerothermal and Thermomechanical Performance of Double-Wall Effusion Cooled Systems,” ASME Paper No. GT2017-64711.
Sweeney, P. C. , and Rhodes, J. F. , 1999, “ An Infrared Technique for Evaluating Turbine Airfoil Cooling Designs,” ASME J. Turbomach., 122(1), pp. 170–177. [CrossRef]
Wassell, A. B. , and Bhangu, J. K. , 1980, “ The Development and Application of Improved Combustor Wall Cooling Techniques,” ASME Paper No. 80-GT-66.
Manzhao, K. , Huiren, Z. , Songling, L. , and Hepeng, Y. , 2008, “ Internal Heat Transfer Characteristics of Lamilloy Configurations,” Chin. J. Aeronaut., 21(1), pp. 28–34. [CrossRef]
Rhee, D. H. , Choi, J. H. , and Cho, H. H. , 2003, “ Flow and Heat (Mass) Transfer Characteristics in an Impingement/Effusion Cooling System With Crossflow,” ASME J. Turbomach., 125(1), pp. 74–82. [CrossRef]
Ren, Z. , Vanga, S. R. , Rogers, N. , Ligrani, P. , Hollingsworth, K. , Liberatore, F. , Patel, R. , Srinivasan, R. , and Ho, Y. , 2017, “ Internal and External Cooling of a Full Coverage Effusion Cooling Plate: Effects of Double Wall Cooling Configuration and Conditions,” ASME Paper No. GT2017-64921.
Hong, S. K. , Rhee, D.-H. , and Cho, H. H. , 2007, “ Effects of Fin Shapes and Arrangements on Heat Transfer for Impingement∕Effusion Cooling With Crossflow,” ASME J. Heat Transfer, 129(12), pp. 1697–1707. [CrossRef]
Chyu, M. K. , Hsing, Y. C. , and Natarajan, V. , 1998, “ Convective Heat Transfer of Cubic Fin Arrays in a Narrow Channel,” ASME J. Turbomach., 120(2), pp. 362–367. [CrossRef]
Wang, Z. , Ireland, P. , Jones, T. V. , and Kohler, S. T. , 1994, “ Measurements of Local Heat Transfer Coefficient Over the Full Surface of a Bank of Pedestals With Fillet Radii,” ASME Paper No. 94-GT-307.
Martin, A. , and Thorpe, S. J. , 2012, “ Experiments on Combustor Effusion Cooling Under Conditions of Very High Free-Stream Turbulence,” ASME Paper No. GT2012-68863.
Krawciw, J. , Martin, D. , and Denman, P. , 2015, “ Measurement and Prediction of Adiabatic Film Effectiveness of Combustor Representative Effusion Arrays,” ASME Paper No. GT2015-43210.
Chu, T. , Brown, A. , and Garrett, S. , 1985, “ Discharge Coefficients of Impingement and Film Cooling Holes,” ASME Paper No. 85-GT-81.
Ireland, P. T. , Neely, A. J. , Gillespie, D. R. , and Robertson, A. J. , 1999, “ Turbulent Heat Transfer Measurements Using Liquid Crystals,” Int. J. Heat Fluid Flow, 20(4), pp. 355–367. [CrossRef]
Fang, F.-M. , 1997, “ A Design Method for Contractions With Square End Sections,” ASME J. Fluids Eng., 119(2), pp. 454–458. [CrossRef]
Tsang, C. L. P. , Gillespie, D. R. H. , Ireland, P. T. , and Dailey, G. M. , 2000, “ Analysis of Transient Heat Transfer Experiments,” Eighth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, HI, Vol. 2, pp. 714–721.
Moffat, R. J. , 1988, “ Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1(1), pp. 3–17. [CrossRef]
Goldstein, R. J. , 1971, “ Film Cooling,” Advances in Heat Transfer, Vol. 7, Academic Press, San Diego, CA, pp. 321–379.
Baldauf, S. , Schulz, A. , and Wittig, S. , 2001, “ High-Resolution Measurements of Local Effectiveness From Discrete Hole Film Cooling,” ASME J. Turbomach., 123(4), pp. 758–765. [CrossRef]
Murray, A. V. , Ireland, P. T. , Wong, T. H. , Tang, S. W. , and Rawlinson, A. J. , 2018, “ High Resolution Experimental and Computational Methods for Modelling Multiple Row Effusion Cooling Performance,” Int. J. Turbomach. Propul. Power, 3(1), p. 4. [CrossRef]
Sellers, J. P. , 1963, “ Gaseous Film Cooling With Multiple Injection Stations,” AIAA J., 1(9), pp. 2154–2156. [CrossRef]
Lakshminarayana, B. , 1996, Fluid Dynamics and Heat Transfer of Turbomachinery, Wiley, Hoboken, NJ.
Bunker, R. S. , 2006, “ Cooling Design Analysis,” The Gas Turbine Handbook, U.S. Department of Energy NETL, Morgantown, VA.
Zuckerman, N. , and Lior, N. , 2005, “ Impingement Heat Transfer: Correlations and Numerical Modeling,” ASME J. Heat Transfer, 127(5), pp. 544–552. [CrossRef]


Grahic Jump Location
Fig. 1

Double-wall cooled turbine blade concept

Grahic Jump Location
Fig. 2

Section view schematic showing the side of the experimental facility

Grahic Jump Location
Fig. 3

Isometric section view of the experimental facility with a number of features enlarged

Grahic Jump Location
Fig. 4

One-dimensional vertical traverse of the test section, 6Df upstream of the test piece at mainstream experimental test conditions

Grahic Jump Location
Fig. 5

Difference in individual thermocouple reading from the average increase in temperature measured by all nine thermocouples, where their locations are shown by the crosses

Grahic Jump Location
Fig. 6

Basic repeating pedestal geometry unit (termed the unit cell) under investigation

Grahic Jump Location
Fig. 7

Graphic showing the domain enlargement and coupling of the external and internal cooling methods forming the final thermal profile

Grahic Jump Location
Fig. 8

Experimental overall effectiveness contours for coolant m* = 1.52. (Top) Displays the external surface of the effusion wall and (bottom) external surface of the impingement wall.

Grahic Jump Location
Fig. 9

Normalized velocity contours, with vectors at both the midpedestal plane (top) and across the horizontal center of the test piece (bottom) for the m* = 1.52 test case

Grahic Jump Location
Fig. 10

Overall effectiveness contours from the fully conjugate rig CFD (left) and decoupled conjugate CFD method (right). (Top) Displays the external surface of the effusion wall and (bottom) external surface of the impingement wall.

Grahic Jump Location
Fig. 11

Area-weighted averaged overall effectiveness from the experiments and both CFD methods



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In