タービン内再熱水素燃焼ガスタービンの研究

概要

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We developed an experimental single stage turbine for demonstration of an internal hydrogen reheat gas turbine, in which hydrogen is discharged from the trailing edges of the nozzle vanes into the turbine passage to reheat the working gas. A series of experiments with this turbine were carried out and the results showed the possibility of its realization. Almost complete combustion efficiencies of the hydrogen for the internal reheat are achieved in a wide range of hydrogen bleeding rate. The increments in the output power by the internal reheat indicate 30% to 70% of those by a one-dimensional turbine performance analysis. The reheat does not affect the amount of NOx in exhaust gas in the experiment at temperature of 1240 K, but the ratio of NO to NOx is diminished by the reheat process and its tendency has a correlation with the concentrations of the unburned hydrogen gases in the exhaust gas. After the operation with reheat by hydrogen for eleven and a half hours in total, considerable problems associated with the internal reheat are not observed in the turbine structures.
社団法人日本ガスタービン学会の論文
1998-06-10