Method for analysis of showerhead film cooling experiments on highly curved surfaces

Wagner, G; Schneider, E; Ott, P; von Wolfersdorf, J; Weigand, B

doi:10.1016/J.EXPTHERMFLUSCI.2006.05.006

Title: Method for analysis of showerhead film cooling experiments on highly curved surfaces

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Abstract

The transient liquid crystal technique has been extensively used for measuring the heat transfer characteristics in gas turbine applications. Thereby, the time evolution of the surface temperature is usually evaluated using the model of a semi-infinite flat plate. For experiments on cylinders, Wagner et al. [G. Wagner, M. Kotulla, P. Ott, B. Weigand, J. von Wolfersdorf, The transient liquid crystal technique: influence of surface curvature and finite wall thickness, ASME Paper GT2004-53553, 2004] showed, that curvature and finite thickness effects can have an influence on the obtained heat transfer coefficients. The aim of this study is to develop a time effective data reduction method that accounts for curvature and that is applicable to film cooling experiments with time varying adiabatic wall temperatures. To verify this method, transient liquid crystal experiments have been carried out on a blunt body model with showerhead film cooling. The experimental data was evaluated with the traditional semi-infinite flat plate approach and with the curvature correction using regression analysis. (author)

Authors:

Wagner, G; Schneider, E; Ott, P ^[1]; von Wolfersdorf, J; Weigand, B ^[2]

Laboratoire de Thermique Appliquee et de Turbomachines (LTT), Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)
Institute of Aerospace Thermodynamics (ITLR), University of Stuttgart, D-70569 Stuttgart (Germany)

Publication Date:: Thu Feb 15 00:00:00 EST 2007

OSTI Identifier:: 20843290

Resource Type:: Journal Article

Journal Name:: Experimental Thermal and Fluid Science

Additional Journal Information:: Journal Volume: 31; Journal Issue: 4; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0894-1777

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; GAS TURBINES; FILM COOLING; TRANSIENTS; HEAT TRANSFER; DATA ANALYSIS; MEASURING METHODS; AIRFOILS

Citation Formats


                    Wagner, G, Schneider, E, Ott, P, von Wolfersdorf, J, and Weigand, B. Method for analysis of showerhead film cooling experiments on highly curved surfaces.  United States: N. p., 2007. 
        Web.  doi:10.1016/J.EXPTHERMFLUSCI.2006.05.006.

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                    Wagner, G, Schneider, E, Ott, P, von Wolfersdorf, J, & Weigand, B. Method for analysis of showerhead film cooling experiments on highly curved surfaces.  United States.  https://doi.org/10.1016/J.EXPTHERMFLUSCI.2006.05.006

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                    Wagner, G, Schneider, E, Ott, P, von Wolfersdorf, J, and Weigand, B. 2007.  
        "Method for analysis of showerhead film cooling experiments on highly curved surfaces".  United States.  https://doi.org/10.1016/J.EXPTHERMFLUSCI.2006.05.006.

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@article{osti_20843290,

  title        = {Method for analysis of showerhead film cooling experiments on highly curved surfaces},

  author       = {Wagner, G and Schneider, E and Ott, P and von Wolfersdorf, J and Weigand, B},

  abstractNote = {The transient liquid crystal technique has been extensively used for measuring the heat transfer characteristics in gas turbine applications. Thereby, the time evolution of the surface temperature is usually evaluated using the model of a semi-infinite flat plate. For experiments on cylinders, Wagner et al. [G. Wagner, M. Kotulla, P. Ott, B. Weigand, J. von Wolfersdorf, The transient liquid crystal technique: influence of surface curvature and finite wall thickness, ASME Paper GT2004-53553, 2004] showed, that curvature and finite thickness effects can have an influence on the obtained heat transfer coefficients. The aim of this study is to develop a time effective data reduction method that accounts for curvature and that is applicable to film cooling experiments with time varying adiabatic wall temperatures. To verify this method, transient liquid crystal experiments have been carried out on a blunt body model with showerhead film cooling. The experimental data was evaluated with the traditional semi-infinite flat plate approach and with the curvature correction using regression analysis. (author)},

  doi          = {10.1016/J.EXPTHERMFLUSCI.2006.05.006},

  url          = {https://www.osti.gov/biblio/20843290},
  journal      = {Experimental Thermal and Fluid Science},

  issn         = {0894-1777},

  number       = 4,

  volume       = 31,

  place        = {United States},

  year         = {Thu Feb 15 00:00:00 EST 2007},

  month        = {Thu Feb 15 00:00:00 EST 2007}

}

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