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RESEARCH PAPERS: Gas Turbines: Ceramics

Development of Air-Cooled Ceramic Nozzles for a Power-Generating Gas Turbine

[+] Author and Article Information
T. Tsuchiya, Y. Furuse, S. Yoshino

Engineering R&D Center, Tokyo Electric Power Company, Yokohama, Kanagawa, Japan

R. Chikami, Y. Tsukuda

Takasago Machinery Works, Mitsubishi Heavy Industries, Ltd., Takasago, Hyogo, Japan

M. Mori

Takasago R&D Center, Mitsubishi Heavy Industries, Ltd., Takasago, Hyogo, Japan

J. Eng. Gas Turbines Power 118(4), 717-723 (Oct 01, 1996) (7 pages) doi:10.1115/1.2816986 History: Received February 13, 1995; Online November 19, 2007

Abstract

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 Si3 N4 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 Si3 N4 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.

Copyright © 1996 by The American Society of Mechanical Engineers
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