HOLLOW NOZZLE, COMBUSTOR INCLUDING HOLLOW NOZZLE, AND GAS TURBINE INCLUDING COMBUSTOR

A hollow nozzle (110) including a tubular nozzle casing (111) and a plurality of rotary vanes (112) arranged radially along an inner surface of an inlet of the nozzle casing, through which compressed air is introduced, forming a hollow center (1) at the center of the nozzle casing through which the compressed air flows, each of the rotary vanes including a first fuel injection hole (113) through which a first type of fuel having a predetermined flame propagation speed is injected toward the hollow center, and a second fuel injection hole (114) through which a second type of fuel having a higher flame propagation speed than the first type of fuel is injected, a combustor including the hollow nozzle, and a gas turbine including the combustor.