Premixing nozzle, combustor, and gas turbine

摘要

A premixing nozzle (800) includes swirler blades (300) for agitating combustion air inside a nozzle body (10). Each one end of the swirler blades (300) is fitted to the nozzle body (10), and the other end is connected to a hub (100), respectively. The tip portion (200a) of a fuel nozzle shaft (200) is conical, and a part of the tip portion (200a) is arranged inside the hub (100). A combustion gas flows into the hub (100) from a space between the tip portion (200a) of the fuel nozzle shaft (200) and the upstream end (100b) of the hub (100), passes through between the tip portion (200a) and the inner peripheral surface of the hub (100), and flows toward the downstream of the hub (100).