Combustor having a duct with a reduced portion and an orifice plate

摘要

There is provided a combustor which produces high-temperature combustion gas and supplies the combustion gas to a driving apparatus, characterized in that a reducing portion is provided on a duct, an orifice plate is provided protruding from the parallel inner peripheral surface of the duct on the upstream side of the reducing portion, and the duct is disposed between a combustor inner tube and a combustor outlet pipe, thereby making the temperature of the combustion gas flowing from the combustor inner tube to the combustor outlet pipe substantially uniform.