Atomizer
In an atomizer constructed to cool inlet air for a gas turbine by spraying fine droplets of water into the inlet air, a spray nozzle is disposed to spray the finely atomized droplets of water from an outer edge of an atomized airstream into a high-speed zone thereof, towards a central region of the airstream. The atomized airstream meets an airstream of a low-speed zone formed at a downstream side, and after the two kinds of airstreams have been mixed and unified, this mixture is supplied to an axisymmetric compressor. Devices such as a feed water pipe and spray nozzle are placed in the low-speed zone so as not to obstruct the airstream.
1 . An atomizer constructed to cool inlet air for a gas turbine by spraying fine droplets of water into the inlet air,
wherein a spray nozzle is disposed to spray the finely atomized droplets of water from an outer edge of an atomized airstream into a high-speed zone thereof, towards a central region of the airstream.
2 . The atomizer according to claim 1 , wherein:
the spray nozzle is placed in a low-speed zone formed at rear of a silencer sound absorber; and
when width of a flow channel across the silencer sound absorber is taken as W and a distance from an outlet of the silencer sound absorber to an atomizing hole of the spray nozzle is taken as L, a relationship of L<2W is established.
3 . The atomizer according to claim 2 , wherein:
the spray nozzle includes a first spray nozzle adapted to spray water into the central region of the high-speed zone of the airstream, and a second spray nozzle adapted to spray water into a peripheral region of the high-speed zone of the airstream.
4 . The atomizer according to claim 2 , wherein:
the spray nozzle is disposed in plurality to spray droplets from a low-speed zone formed at rear of a silencer sound absorber, into adjacent high-speed zones, an independent feed water pipe being connected to each of the spray nozzles.
5 . The atomizer according to claim 4 , configured so that the amount of water to be sprayed increases stepwise for each of the spray nozzles.
6 . The atomizer according to claim 1 , wherein:
an ultrasonic atomizing element of a blade form is placed alongside at an outlet side of a silencer sound absorber such that the droplets are sprayed from a neighborhood of an interblade throat into the high-speed zone of the airstream.
7 . The atomizer according to claim 1 , wherein:
the spray nozzle is a single-fluid nozzle constructed to spray high-temperature water of at least 100° C., under pressure.