水素燃焼雰囲気下におけるガスタービン単結晶翼の高温酸素挙動

概要

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As one of the elemental tests for the development of 1700℃ class hydrogen fueled combustion turbine system under the World Energy Network (WE-NET) program, high temperature oxidation behaviors of single crystal (SO alloy CMSX-4 and thermal barrier coating (TBC) were conducted at the temperature of 600°-1000℃ in the air and steam environments. Comparable weight gains due to the oxidation in the air and steam were observed at 1000℃, but below this temperature maximum weight gain was observed at 800℃ in the steam whereas that in the air continuously decreased as the test temperature decreased. The scale model SC rotor blade with TBC which was tested in the hydrogen-oxygen combustion wind tunnel with practical steam condition of 1700℃ (max.) and 2.44 MPa for 186 min were destructively evaluated, the result of which showed no symptom of steam oxidation due to increase of metal temperature over the designed one.
2001-03-20