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GE Power & Water will develop cooled high-temperature ceramic matrix composite (CMC) nozzles (non-rotating airfoil hardware) as an innovative turbomachinery component contributing towards the DOE's goal for advanced gas turbine efficiencies that are greater than 65% in combined cycle applications, including coal based IGCC. This project, by leveraging existing design and analysis knowledge and techniques for CMC materials, will utilize extensive analytical evaluations to develop and refine designs for a CMC nozzle in an industrial gas turbine hot gas path. The Phase I project scope of work will consist of three elements: (1) design and analyze attachment configurations: a bayonet style and a more traditional airfoil with two end-walls, (2) investigate impingement and film cooling, and (3) define sealing approaches, design key sealing features, and analyze sealing effectiveness for the best designs. Limited bench flow testing will be performed to support these efforts. The design, or designs, will be the basis for development and testing in a potential future Phase II. Previous related work was performed under DOE contract FC26-05NT42643.
GE Power & Water will develop a project that targets high-temperature CMC nozzles as an innovative turbomachinery component contributing towards the DOE’s goal for advanced gas turbines that are capable of 65%, or greater, efficiency in combined cycle application. The CMC component development activity facilitates high firing temperatures and improved performance through enhanced designs and concepts, better sealing, reduced leakage, leveraging advanced manufacturing processes to facilitate high performing turbomachinery, and revolutionary components architecture that will improve the gas turbine performance in a combined-cycle application. This technology advancement will also benefit gas turbines used in coal based IGCC applications with pre-combustion carbon capture and hydrogen as the resulting fuel. The development of this technology will build upon CMC capability advancements made under earlier DOE programs.