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Proceedings Paper

Novel sensors to enable closed-loop active clearance control in gas turbine engines
Author(s): Jonathan Geisheimer; Tom Holst
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Paper Abstract

Active clearance control within the turbine section of gas turbine engines presents and opportunity within aerospace and industrial applications to improve operating efficiencies and the life of downstream components. Open loop clearance control is currently employed during the development of all new large core aerospace engines; however, the ability to measure the gap between the blades and the case and close down the clearance further presents as opportunity to gain even greater efficiencies. The turbine area is one of the harshest environments for long term placement of a sensor in addition to the extreme accuracy requirements required to enable closed loop clearance control. This paper gives an overview of the challenges of clearance measurements within the turbine as well as discusses the latest developments of a microwave sensor designed for this application.

Paper Details

Date Published: 4 June 2014
PDF: 10 pages
Proc. SPIE 9083, Micro- and Nanotechnology Sensors, Systems, and Applications VI, 908310 (4 June 2014); doi: 10.1117/12.2051570
Show Author Affiliations
Jonathan Geisheimer, Meggitt Sensing Systems (United States)
Tom Holst, Meggitt Sensing Systems (United States)

Published in SPIE Proceedings Vol. 9083:
Micro- and Nanotechnology Sensors, Systems, and Applications VI
Thomas George; M. Saif Islam; Achyut K. Dutta, Editor(s)

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