AIR-HEATER USING GASEOUS FUEL HAVING INJECTOR HAVING COOLING PIN

摘要

According to the present invention, an air heater has a cooling pin formed along the outer circumferential surface of an oxidizer injector to form a cooling area of air moved by a hole. The injector is supported to be spaced from an inner surface of the hole by a first cooling pin, and the cooling area is formed in a periphery of the injector by a second cooling pin. Therefore, the present invention can improve cooling properties and protects the injector from high-temperature heat of combustion gas.