In the present study a method for estimating local heat transfer distributions of internal cooling systems is described. Experimental data and finite element analysis are applied for this method. The investigations considered in this paper are based on experiments performed on a two-pass cooling channel connected by a 180° bend with internal rib arrangements. The solid walls of the cooling channels are made of a metallic material. During the experiment the temperature response of the outer surface induced by heated internal flow is recorded by infrared thermography. The internal heat transfer distribution is obtained using an optimization routine. For each loop of the optimization a transient thermal simulation of the solid body is performed applying the boundary and inlet conditions of the experiment. The temperature of the outer surface calculated by the finite element simulation is compared to the measured temperature recorded by infrared thermography. The difference of these temperature distributions is minimized by adapting the distribution of the internal heat transfer coefficients. The adaptation is conducted on single elements of the inner surface and will be presented in detail in the paper. This approach allows to achieve a high resolution in heat transfer while minimizing the required iterations. The combination of experimental data and finite element analysis allows to consider three dimensional conduction effects in the solid and the streamwise fluid temperature development. Results are compared to literature data.
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ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
June 3–7, 2013
San Antonio, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5514-0
PROCEEDINGS PAPER
Combined Experimental/Numerical Method Using Infrared Thermography and Finite Element Analysis for Estimation of Local Heat Transfer Distribution in an Internal Cooling System
Christian Egger,
Christian Egger
University of Stuttgart, Stuttgart, Germany
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Jens von Wolfersdorf,
Jens von Wolfersdorf
University of Stuttgart, Stuttgart, Germany
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Martin Schnieder
Martin Schnieder
Alstom Power, Baden, Switzerland
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Christian Egger
University of Stuttgart, Stuttgart, Germany
Jens von Wolfersdorf
University of Stuttgart, Stuttgart, Germany
Martin Schnieder
Alstom Power, Baden, Switzerland
Paper No:
GT2013-95472, V03AT12A045; 12 pages
Published Online:
November 14, 2013
Citation
Egger, C, von Wolfersdorf, J, & Schnieder, M. "Combined Experimental/Numerical Method Using Infrared Thermography and Finite Element Analysis for Estimation of Local Heat Transfer Distribution in an Internal Cooling System." Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 3A: Heat Transfer. San Antonio, Texas, USA. June 3–7, 2013. V03AT12A045. ASME. https://doi.org/10.1115/GT2013-95472
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