Employing ceramic materials for the critical components of industrial gas turbines is anticipated to improve the thermal efficiency of power plants. We developed a first-stage stator vane for a 1300°C class, 20-MW industrial gas turbine. This stator vane has a hybrid ceramic/metal structure, to increase the strength reliability of brittle ceramic parts, and to reduce the amount of cooling air needed for metal parts as well. The strength design results of a ceramic main part are described. Strength reliability evaluation results are also provided based on a cascade test using combustion gas under actual gas turbine running conditions.

Issue Section:
Gas Turbines: Ceramics
Topics:
Ceramics, Design, Industrial gases, Reliability, Stators, Turbines, Brittleness, Cascades (Fluid dynamics), Combustion gases, Cooling, Gas turbines, Metals, Metalwork, Power stations, Thermal efficiency
1.
Abe, T., Hisamatsu, T., Miyata, H., Iijima, S., and Nakakado, K., 1989, “R & D of Ceramic Stator Vane for High-Temperature Gas Turbine (II, Experimental Study on Heat Resistance and Cooling Characteristics),” Proc. 17th Gas Turbine Congress, GTSJ, p. 39 [in Japanese].
2.
EPRI report, 1986, “Ceramic for Electric Power-Generating Systems,” EPRI AP-4380, final report.
3.
Kru¨ger, W., and Hu¨ther, W., 1989, “Metal Ceramic Guide Vanes: New Design Concept,” ASME Paper No. 89-GT-334.
4.
Miyata
H.
,
Iijima
S.
,
Ohshima
R.
,
Abe
T.
,
Hisamatsu
T.
, and
Hamamatsu
T.
,
1989
, “
Application Technology on Ceramics for Structural Components of High-Temperature Machines
,”
JSME Int. J. Series 1
, Vol.
32
, No.
4
, p.
596
596
.
5.
Mori, N., Hisamatsu, T., Yuri, I., Miyata, H., Nakakado, K., and Machida, T., 1991, “Development of Ceramic Stator Vanes for Power Plant Gas Turbines,” Proc. 1991 Yokohama International Gas Turbine Congress, Japan, p. 1–143.
6.
Nakakado, K., Machida, T., Miyata, H., Hisamatsu, T., Mori, N., and Yuri, I., 1990, “Development and Strength Reliability Evaluation of a Ceramic Stator Vane for Industrial Gas Turbines,” Proc. 4th International Symposium on Ceramic Materials and Components for Engines, in press.
7.
Ohkoshi, A., Watanabe, N., Tsuji, I., Tsukagoshi, K., and Kawai, H., 1987, “Manufacturing and Hot Rig Testing of Ceramic Vanes for Gas Turbines,” Proc. 1987 Tokyo International Gas Turbine Congress, GTSJ, p. 1–169.
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