Ion sensors formed with coatings

The invention provides an ion sensor for use in a fuel nozzle of a gas turbine combustor and other combustor surfaces that uses thin-film coatings to form both the dielectric (124) and electrode layer (120,122) of the ion sensor and methods to provide an electrical connection (126) to the electrode...

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Bibliographic Details
Main Authors RILEY, PATRICK, VANDYNE, EDWARD, KELLY, BENSON
Format Patent
LanguageEnglish
French
German
Published 02.08.2006
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:The invention provides an ion sensor for use in a fuel nozzle of a gas turbine combustor and other combustor surfaces that uses thin-film coatings to form both the dielectric (124) and electrode layer (120,122) of the ion sensor and methods to provide an electrical connection (126) to the electrode layer (120,122). The dielectric layer (124) electrically insulates the sensor from the combustor surface, which is typically grounded. The electrode layer (120,122), typically a metallic material capable of withstanding high temperatures in the combustion environment without delamination from the dielectric layer (124), is applied over the dielectric layer (124) and forms the ion-sensing electrode. A wire (126) may protrude through the dielectric layer (124) to connect to the electrode layer (120,122) and provide for the ion-sensing electrode to be controlled outside of the combustion zone (e.g., by a control module for signal processing).
Bibliography:Application Number: EP20060075161