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Proceedings Paper

Temperature measurement in a turbine stator assembly using an integratable high-temperature ultrasonic sensor network
Author(s): Kuo-Ting Wu; Zhigang Sun; Makiko Kobayashi; Brian Galeote; Nezih Mrad
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Paper Abstract

Implementation of an integratable ultrasonic sensor network with associated cable connection for high temperature monitoring applications is demonstrated through application of a three-element ultrasonic sensor network for temperature measurement in a turbine stator assembly. The sensor network is composed of a piezoelectric composite film deposited on a titanium substrate with a sol-gel technique and three top electrodes deposited on the piezoelectric film. The sensor network is glued onto a selected area of the stator assembly in such a way that three subareas with different wall thicknesses are probed individually by each of the sensing elements. The ultrasonically instrumented stator assembly is first heated in a furnace to different temperatures. At each temperature and for each probed location the transit time of ultrasonic waves through assembly wall thickness is measured. Then a relationship between transit time and wall temperature is established. In a subsequent experiment, the stator assembly is heated up to 200 °C and then let cool down while the transit time in the assembly wall is being measured continuously. By using the transit time versus temperature relationship obtained earlier, the heating and cooling rates at the three probed locations are determined and then compared.

Paper Details

Date Published: 28 April 2011
PDF: 8 pages
Proc. SPIE 7979, Industrial and Commercial Applications of Smart Structures Technologies 2011, 797902 (28 April 2011); doi: 10.1117/12.880522
Show Author Affiliations
Kuo-Ting Wu, National Research Council Canada (Canada)
Zhigang Sun, National Research Council Canada (Canada)
Makiko Kobayashi, National Research Council Canada (Canada)
Brian Galeote, National Research Council Canada (Canada)
Nezih Mrad, Dept. of National Defence (Canada)


Published in SPIE Proceedings Vol. 7979:
Industrial and Commercial Applications of Smart Structures Technologies 2011
Kevin M. Farinholt; Steve F. Griffin, Editor(s)

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