General Electric Company

David Elson Caldwell

Andrew Jay Skoog

William Randolph Stowell

Jane Ann Murphy

Byron Andrew Pritchard, Jr

Ambarish Jayant Kulkarni

Nicole Jessica Tibbetts

Michael Edward Eriksen

John Michael Koshoffer

The present disclosure is directed to a method for in-situ cleaning one or more components of a gas turbine engine using an abrasive gel detergent. More specifically, the gel detergent includes a plurality of abrasive particles suspended in a gel composition. Further, the abrasive particles include organic material. Moreover, the gel composition is formed of a mixture of detergent particles dissolved in a gel reactant. Thus, the method includes injecting the gel detergent into at least a portion of the gas turbine engine at a predetermined pressure. In addition, the method includes allowing the gel detergent to flow across or within one or more of the components of the gas turbine engine so as to clean one or more of the components.

Abrasive gel detergent for cleaning gas turbine engine components

A gas turbine engine augmentor includes an augmentor outer casingand an annular augmentor linerdisposed radially within and radially separated from the augmentor outer casingto form a generally annular augmentor liner cooling flow pathbetween the augmentor casing and the annular augmentor liner, and an augmentor flow splitter ductdisposed at the upstream end of the augmentor liner and radially between the augmentor outer casingand the annular augmentor linerand defining a splitter flow pathbetween the annular augmentor linerand the annular augmentor flow splitter duct. A method of operating a gas turbofan engine including an augmentor includes directing a portion of fan bypass air into a generally annular augmentor liner cooling flow pathbetween an augmentor outer casingand an annular augmentor liner, directing a portion of the air in the augmentor liner cooling flow pathinto a splitter flow pathdisposed radially outside the augmentor linerand maintaining positive backflow pressure margin between air flow within the splitter flow path and the augmentor liner cooling flow path

Exhaust dust flow splitter system

A chemical composition and method for repairing a thermal barrier coating on a component designed for use in a hostile thermal environment, such as turbine, combustor and augmentor components of a gas turbine engine. The method repairs a thermal barrier coating on a component that has suffered localized damage to the thermal barrier coating. After cleaning the surface area of the component exposed by the localized spallation, a paste-like mixture of a ceramic composition comprising ceramic powders and nano-sized ceramic materials in a binder, further including an accelerant, is applied to the surface area of the component, and is optionally smoothed using mechanical means. The composition is then allowed to dry and cure to form a dried coating having polymeric characteristics. Upon subsequent heating, the dried coating reacts to produce a glassy ceramic repair coating. Due to the thixotropic properties of the coating composition upon application to a component, the repair method can be performed in-situ while the component remains installed in its operating environment.

Field repairable high temperature smooth wear coating

A chemical composition and method for repairing a thermal barrier coating on a component designed for use in a hostile thermal environment, such as turbine, combustor and augmentor components of a gas turbine engine. The method repairs a thermal barrier coating on a component that has suffered localized damage to the thermal barrier coating. After cleaning the surface area of the component exposed by the localized spallation, a paste-like mixture of a ceramic composition comprising ceramic powders and nano-sized ceramic materials in a binder is applied to the surface area of the component, and is optionally smoothed using mechanical means. The composition is then allowed to dry and cure to form a dried coating having polymeric characteristics. Upon subsequent heating, the dried coating reacts to produce a glassy ceramic repair coating. Due to the thixotropic properties of the coating composition upon application to a component, the repair method can be performed in-situ while the component remains installed in its operating environment.

Growing community of inventors

West Chester, OH, United States of America

David Elson Caldwell