Method and system for tuning a turbine using secondary injection nozzles in nozzle ring

摘要

A turbine and method of operating the same includes a housing having a volute and an outlet and an impeller rotatable coupled to the housing. The turbine includes a nozzle ring having a plurality of primary nozzles and a plurality of secondary nozzles. The plurality of primary nozzles and the plurality of secondary nozzles direct fluid toward the impeller. An auxiliary valve assembly selectively communicates fluid from the volute to the plurality of secondary nozzles. An actuator is coupled to the valve auxiliary assembly moving the auxiliary valve assembly from a first position communicating fluid from the volute into the secondary nozzles to a second position blocking flow of fluid to the secondary nozzles.

主权项

1. A turbine comprising:
a housing having a volute and an outlet; an impeller rotatable coupled to the housing; a nozzle ring having a plurality of primary nozzles and a plurality of secondary nozzles, said plurality of primary nozzles and said plurality of secondary nozzles direct fluid toward the impeller; an auxiliary valve assembly selectively communicating fluid from the volute to the plurality of secondary nozzles; and an actuator coupled to the auxiliary valve assembly moving the valve auxiliary assembly from a first position communicating fluid from the volute into the secondary nozzles to a second position blocking flow of fluid to the secondary nozzles.