Injector apparatus with reheat combustor and turbomachine

A reheat combustor comprising:

• a reaction chamber positioned between a mixing duct and a turbine nozzle of a turbine stage positioned downstream of the reaction chamber, wherein the reaction chamber includes a fore section and an aft section, wherein an air and a first portion of a fuel delivered from the mixing duct combust in the fore section of the reaction chamber, and wherein the turbine nozzle defines a throat separating the aft section of the reaction chamber from the turbine stage of a power generation system;
• a first injector embedded within a surface of the turbine nozzle, oriented substantially in opposition to a direction of a fluid flow from the reaction chamber, wherein the first injector is in fluid communication with a single reaction zone within the reheat combustor, and wherein the first injector delivers a first portion of a carrier gas and a second portion of the fuel to the aft section of the reaction chamber;
• a second injector extending through a wall of the reaction chamber, and positioned upstream from the first injector, wherein the second injector delivers a second portion of the carrier gas and a third portion of the fuel to the aft section of the reaction chamber;
• at least one first conduit in fluid communication between a fuel supply line and the first and second injectors, wherein the at least one first conduit includes a first valve;
• a controller operatively connected to the first valve of the at least one first conduit;
• a temperature sensor in communication with the controller for measuring an inlet temperature of the reheat combustor;
• and
• an emissions sensor in communication with the controller for measuring an emissions output of the reheat combustor,
• wherein the controller adjusts a position of the first valve to adjust an amount of the second and third portions of the fuel, in response to the inlet temperature exceeding a temperature tolerance, or the emissions output of the reheat combustor exceeding an emissions tolerance.

An apparatus comprising:

• a turbine nozzle positioned downstream of a reheat combustor of a power generation system, wherein the turbine nozzle defines a throat separating the reheat combustor from a turbine stage of the power generation system;
• a reaction chamber of the reheat combustor positioned upstream of the turbine nozzle, wherein the reaction chamber includes a fore section and an aft section, and wherein an air and a first portion of a fuel combust in the fore section of the reaction chamber;
• a fuel supply line in fluid communication with a first injector for injecting a second portion of the fuel and a carrier gas from a surface of the turbine nozzle into the aft section of the reaction chamber, wherein the first injector is oriented substantially in opposition to a direction of a fluid flow from the reheat combustor, positioned downstream from a second fuel injector in fluid communication with the reheat combustor, and wherein the fuel supply line is in fluid communication with a single reaction zone within the reheat combustor, through the injector;
• at least one fuel valve positioned within the fuel supply line;
• a controller operatively connected to the at least one fuel valve;
• a temperature sensor in communication with the controller measuring an inlet temperature of the reaction chamber;
• an emissions sensor in communication with the controller for measuring an emissions output of the reaction chamber, wherein the controller adjusts a position of the at least one fuel valve to adjust an amount of the second portion of the fuel in response to the inlet temperature exceeding a temperature tolerance, or the emissions output of the reaction chamber exceeding an emissions tolerance.