A Novel Transient Heater-Foil Technique for Liquid Crystal Experiments on Film-Cooled Surfaces-Reference-Cited by-同舟云学术

A Novel Transient Heater-Foil Technique for Liquid Crystal Experiments on Film-Cooled Surfaces

Published:2002-10-29 Issue:3 Volume:125 Page:529-537
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Vogel G.¹,Graf A. B. A.¹,von Wolfersdorf J.²,Weigand B.²

Affiliation:

1. Laboratoire de Thermique Applique´e et de Turbomachines (LTT), EPFL, 1015 Lausanne, Switzerland

2. Institut fu¨r Thermodynamik der Luft- und Raumfahrt, Universita¨t Stuttgart, 70569 Stuttgart, Germany

Abstract

A novel transient measurement technique has been developed for determining the heat transfer characteristics in the presence of film cooling (heat transfer coefficient and adiabatic film-cooling effectiveness). The method is based on a transient heater foil technique, where a non-homogeneous surface heat flux is applied to the test surface. A regression analysis of multiple transient liquid crystal experiments is used to obtain the heat transfer characteristics. The method introduced here has the advantage that the (often not known) heat flux distribution at the surface is not needed for the analysis of the measured data. The method is used to study the influence of several heater foil configurations on a flat plate with film cooling, elucidating the effect of different thermal boundary conditions on film-cooling performance. The obtained data is also compared to results presented in literature and good agreement is found.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/125/3/529/5841362/529_1.pdf

Reference27 articles.

1. Goldstein, R. J., 1971, “Film Cooling,” Advances in Heat Transfer, eds., T. F. Irvine and J. P. Hartnett, Academic Press, New York, Vol. 7, pp. 321–379.

2. VKI Lecture Series, 1982, “Film Cooling and Turbine Blade Heat Transfer,” VKI-LS 82-02.

3. Leontiev, A. I. , 1999, “Heat and Mass Transfer Problems for Film Cooling,” ASME J. Heat Transfer, 121, pp. 509–527.

4. Sinha, A. K., Bogard, D. G., and Crawford, M. E., 1990, “Film Cooling Effectiveness Downstream of a Single Row of Holes with Variable Density Ratio,” 90-GT-43.

5. Forth, C. J., Loftus, P. J., and Jones, T. V., 1980, “The Effect of Density Ratio on the Film Cooling of a Flat Plate,” AGARD CP 390, Bergen.

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