IGTC-101 Development of Ceramic Vanes for an Industrial Gas Turbine(Organized Session III CERAMICS FOR GAS TURBINES FOR POWER GENERATION)

概要

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The development of uncooled ceramic vanes for a 20MW class gas turbine with the firing temperature of 1300℃ is progressing. In this paper, details of the ceramic vanes structure and the results of the tests are discussed. The 1st stage ceramic vanes were made of sintered SiC or sintered Si_3N_4, and the 2nd stage ceramic vanes were made of sintered Si_3N_4. From the viewpoint of thermal-stress-reducing, the ceramic vane was divided into three parts for the airfoil and the inner and outer shrouds. These were tightened with metal shrouds and a metal core having cooling holes. These vanes were tested by means of strength test simulating gas force, and high-temperature and high-pressure cascade testing simulating actual gas turbines operations. After minor modifications, we have succeeded in developing sound ceramic vanes which are durable against high thermal stress which occurs during trip transient (emergency shutdowns or fuel tripouts). We obtained excellent results for the practical application of ceramic vanes to industrial gas turbines.
公益社団法人日本ガスタービン学会の論文