The development of air-cooled ceramic nozzle vanes for a power-generating gas turbine has been reported. To make up the limited temperature resistance of present ceramic materials, the utilization of a small amount of cooling air has been studied for the first-stage nozzle vanes of a 1500°C class gas turbine. A series of cascade tests were carried out for the designed air-cooled Si3N4 nozzle vanes under 6 atm and 1500°C conditions. It was confirmed that the maximum ceramic temperature can be maintained below 1300°C by a small amount of cooling air. In spite of the increased thermal stresses from local cooling, all Si3N4 nozzle vanes survived the cascade tests, including both steady-state and transients of emergency shutdown. The potential for an air-cooled ceramic nozzle was demonstrated for a 1500°C class gas turbine application.

1.
Hara, Y., et al., JSME Reports, No. 870–10, Nov. 1987.
2.
Tsuchiya, T., Journal of the Gas Turbine Society of Japan, Vol. 18, No. 69, June 1990.
3.
Hara, Y., FC Reports, Vol. 8(10), 1990.
4.
Hara, Y., et al., JSME Reports, No. 870–60, Nov. 1989.
5.
Tsuchiya, T., et al., Proceedings of the 18th Regular Meeting for the Gas Turbine Society of Japan, June 1990.
6.
Ohkoshi, A., et al., Proceedings of the 1987 TOKYO International Gas Turbine Congress, 87-TOKYO-IGTC-121, Oct. 1987.
7.
Hara, Y., et al., Proceedings of the 18th Regular Meeting for the Gas Turbine Society of Japan, June 1990.
8.
Furuse, Y., et al., Proceedings of the 18th Regular Meeting for the Gas Turbine Society of Japan, June 1989.
9.
Tsuji, I., et al., ASME Paper No. 91-GT-311, 1991.
10.
Hara, Y., et al., ASME Paper No. 91-GT-319, 1991.
11.
Maeda, F., et al., Proceedings of the 1991 YOKOHAMA International Gas Turbine Congress, 91-YOKOHAMA-IGTC-44, 1991.
12.
Miyazaki, S., et al., Proceedings of the 1991 YOKOHAMA International Gas Turbine Congress, 91-YOKOHAMA-IGTC-101, 1991.
13.
Machida, T., et al., Proceedings of the 1991 YOKOHAMA International Gas Turbine Congress, 91-YOKOHAMA-IGTC-103, 1991.
14.
Furuse, Y., IUMRS-ICAM-93, Sept. 1993.
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