Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2006-06-20
2006-06-20
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S602000, C073S660000
Reexamination Certificate
active
07062971
ABSTRACT:
A method of monitoring the condition of a thermal barrier coating on a turbine blade or vane during operation of the turbine is provided. The method includes providing a means for receiving acoustic output of the blade or vane during operation of the turbine and monitoring the acoustic output over time, to determine the condition of the thermal barrier coating on the blade or vane. The acoustic output arises from a force on the blade or vane, such as that due to impact of particles, a pulse of gas pressure or constant gas flow. An apparatus employing the above method for monitoring the condition of the thermal barrier coating during operation of the turbine, is also provided.
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Harrold Ronald T.
Sanjana Zal N.
Saint-Surin Jacques M.
Siemens Westinghouse Power Corporation
Williams Hezron
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