Title :
Monitoring blade passage in turbomachinery through the engine case (no holes)
Author :
Roeseler, Cory ; Flotow, Andy Won ; Tappert, Peter
Author_Institution :
Hood Technol. Corp., Hood River, OR, USA
Abstract :
It is possible to detect passage of turbomachinery blades without penetrating the engine case. This "look through the wall" eddy current sensor eases the addition of a PHM system to an engine. This paper introduces this sensing concept, summarizes the physics, and presents results of preliminary tests. Blade material and geometry, case material, thickness and temperature, blade tip clearance, sensor detail and design and blade tip velocity all affect the strength and quality of the signal detected.
Keywords :
aerospace engines; aerospace testing; eddy current testing; gas turbines; monitoring; PHM system; blade material; blade passage monitoring; blade tip clearance; blade tip velocity; case material; eddy current sensor; engine case; gas turbine engine; look through the wall sensor; preliminary tests; turbomachinery; Blades; Eddy currents; Engines; Monitoring; Physics; Prognostics and health management; Sensor systems; Temperature sensors; Testing; Turbomachinery;
Conference_Titel :
Aerospace Conference Proceedings, 2002. IEEE
Print_ISBN :
0-7803-7231-X
DOI :
10.1109/AERO.2002.1036153
