Investigation of the Heat-Island Effect for Heat-Flux Measurements in Short-Duration Facilities-Reference-Cited by-同舟云学术

Investigation of the Heat-Island Effect for Heat-Flux Measurements in Short-Duration Facilities

Published:1997-10-01 Issue:4 Volume:119 Page:753-760
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Dunn M. G.¹,Kim J.²,Rae W. J.³

Affiliation:

1. Gas Turbine Laboratory, The Ohio State University, Columbus, OH 43235

2. Dept. of Engineering, University of Denver, Denver, CO 80208

3. Dept. of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, NY 14260

Abstract

This paper presents the results of an experimental investigation designed to determine the possible influence of a surface-temperature discontinuity on the heat-flux history inferred from the temperature history of a miniature thin-film heat-flux gage (painted on an insulator) embedded in the surface of a metallic component. The resulting surface material discontinuity has the potential of causing a heat-island effect. Simultaneous measurements of the heat-flux history at selected locations along the midspan of a representative turbine airfoil (metal) were performed using continuous strip-type contoured inserts (without temperature discontinuity) and button-type inserts (with temperature discontinuity). Measurements are reported for two Reynolds number conditions. The experimental results suggest that for the experimental conditions of interest to gas turbine research in short-duration facilities, the influence of a potential heat-island on the measured heat flux is insignificant.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/119/4/753/5840731/753_1.pdf

Reference24 articles.

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3. Consigny H. , and RichardsB. E., 1982, “Short-Duration Measurements of Heat-Transfer Rate to a Gas Turbine Rotor Blade,” ASME Journal of Engineering for Power, Vol. 104, pp. 542–551.

4. Doorley J. E. , and OldfieldM. L. G., 1986, “New Heat Transfer Gages for Use on Multilayered Substrates,” ASME JOURNAL OF TURBOMACHINERY, Vol. 108, pp. 153–160.

5. Dunn M. G. , RaeW. J., and HoltJ. L., 1984, “Measurement and Analysis of Heat-Flux Data in a Turbine Stage: Part I: Description of Experimental Apparatus and Data Analysis and Part II: Discussion of Results and Comparison With Predictions,” ASME Journal of Engineering for Gas Turbines and Power, Vol. 106, No. 1, pp. 229–240.

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