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International Journal of Rotating Machinery
Volume 2015 (2015), Article ID 890414, 16 pages
http://dx.doi.org/10.1155/2015/890414
Review Article

Some Experimental Investigations on Gas Turbine Cooling Performed with Infrared Thermography at Federico II

University of Naples Federico II, Piazzale le Tecchio 80, 80125 Napoli, Italy

Received 17 October 2014; Accepted 6 January 2015

Academic Editor: Tariq Iqbal

Copyright © 2015 T. Astarita et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper reviews some experimental measurements of convective heat transfer coefficient distributions which are connected with the cooling of gas turbines, performed by the authors’ research group at the University of Naples Federico II with infrared thermography. Measurements concern impinging jets, cooling of rotating disks, and gas turbine blades, which are either stationary or rotating. The heated thin foil sensor, associated with the detection of surface temperature by means of infrared thermography, is exploited to accurately measure detailed convective heat transfer coefficient maps. The paper also intends to show how to correctly apply the infrared technique in a variety of gas turbines cooling problems.