TS-10 Test Results of Closed-Circuit Cooled Blades for 1700℃ Hydrogen-Fueled Combustion Gas Turbines(Session A-3: Development 3)

概要

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Cooling technologies were developed for 1,700℃-class hydrogen-fueled combustion gas turbines under the International Clean Energy Network Using Hydrogen Conversion (WE-NET) Program. The water cooled first-stage nozzle blade and steam cooled first-stage rotor blade were designed based on the result that the combination of closed-circuit water cooling system for nozzle blades and steam cooling system for rotor blades was most effective for attaining a thermal efficiency of greater than 60%. The former blade features an array of circular holes close to the surface and uses a copper alloy taking advantage of recent coating technologies such as thermal barrier coatings (TBCs). The latter blade has cooling by serpentine cooling passages with V-shaped staggered turbulence promoter ribs which intensify the internal cooling, and a TBC. At the end of phase I of the WE-NET program, the water cooled test nozzle blade and the steam cooled test rotor blade, which were 51% scaled models of those of a plant engine, were fabricated and examined to verify their design validity by using the test facility with a 1,700℃-class hydrogen-fueled combustor.
1999-11-14