A method of operating a dual fuel gas turbine engine (102) includes operating the engine (102) with a first fuel according to a first control loop (202). The method also includes while the engine (102) is operating with the first fuel, bumplessly transitio...

The device (2) has a channel i.e. annular channel, for mixing air and fuel. Swirl blades are arranged between inner and outer limiting walls of the channel and include holes, which are associated to respective fuel supplies (7, 8). The holes have different...