System and method for cooling a nozzle
A nozzle includes a center body and a shroud circumferentially surrounding at least a portion of the center body to define an annular passage between the center body and the shroud. A plurality of apertures pass through the center body to the annular passage, and a plenum extends inside the center body and is in fluid communication with the plurality of apertures. A cooling medium is in fluid communication with the plenum. A method for cooling a nozzle includes flowing a cooling medium through a plenum across a surface of the nozzle.
1. A nozzle comprising:
a. a center body;
b. a shroud circumferentially surrounding at least a portion of the center body to define an annular passage between the center body and the shroud;
c. a plurality of apertures through the center body to the annular passage;
d. a plenum extending inside the center body and in fluid communication with the plurality of apertures;
e. at least one vane between the center body and the shroud, wherein the at least one vane defines a plurality of ports through the at least one vane to the annular passage; and
f. a cooling medium in fluid communication with the plenum.
2. The nozzle as in claim 1 , wherein the cooling medium comprises at least one of steam, an inert gas, or a diluent.
3. The nozzle as in claim 1 , wherein the plenum is in fluid communication with the plurality of ports in the at least one vane.
4. The nozzle as in claim 1 , wherein the shroud defines a plurality of passages through the shroud to the annular passage.
5. The nozzle as in claim 4 , wherein the plenum is in fluid communication with the plurality of passages through the shroud.
6. The nozzle as in claim 1 , further comprising a louver connected to the center body and proximate to at least one of the plurality of apertures.
7. A nozzle comprising:
a. a center body;
b. a shroud circumferentially surrounding at least a portion of the center body to define an annular passage between the center body and the shroud, wherein the shroud defines a plurality of passages through the shroud to the annular passage;
c. a plenum in fluid communication with the plurality of passages through the shroud;
d. at least one vane between the center body and the shroud, wherein the at least one vane defines a plurality of ports through the at least one vane to the annular passage; and
e. a cooling medium in fluid communication with the plenum.
8. The nozzle as in claim 7 , wherein the cooling medium comprises at least one of steam, an inert gas, or a diluent.
9. The nozzle as in claim 7 , wherein the plenum is in fluid communication with the plurality of ports through the at least one vane.
10. The nozzle as in claim 7 , wherein the plenum extends inside the center body and is in fluid communication with the plurality of ports through the at least one vane.
11. The nozzle as in claim 7 , wherein the center body defines a plurality of apertures through the center body to the annular passage.
12. The nozzle as in claim 11 , wherein the plenum extends inside the center body and is in fluid communication with the plurality of apertures through the center body.
13. The nozzle as in claim 7 , further comprising a louver connected to the shroud and proximate to at least one of the plurality of passages.