Contactless measuring method of blade vibration during turbine speed-up

0352007 - ÚT 2011 RIV CZ eng J - Journal Article
Procházka, Pavel - Vaněk, František - Cibulka, Jan - Bula, Vítězslav
Contactless measuring method of blade vibration during turbine speed-up.
Engineering Mechanics. Roč. 17, 3/4 (2010), s. 173-186. ISSN 1802-1484
Institutional research plan: CEZ:AV0Z20760514
Keywords : rotor blade vibration * contactless measurement * tip-timing
Subject RIV: BI - Acoustics

A novel method of contactless measurement of turbine blade vibration during increasing (decreasing) operational speed is presented. The method is based on evaluation of time differences of blade passages along contactless sensors placed on the stator, and substitutional data correction using a numerical model. The method has been verified both numerically and experimentally. For the experimental research on the bladed model wheel of the Institute of Thermomechanics and subsequent applications under operating conditions, two new types of sensors functioning on magnetoresistive and induction principle have been developed.
Permanent Link: http://hdl.handle.net/11104/0191620