US 11,988,137 B1
Auxiliary boiler system for steam injection cycle engine
Jacob C. Snyder, East Haddam, CT (US); and Jon Erik Sobanski, Glastonbury, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Jan. 13, 2023, as Appl. No. 18/096,969.
Int. Cl. F02C 3/30 (2006.01)
CPC F02C 3/305 (2013.01) [F05D 2220/62 (2013.01); F05D 2260/211 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A steam injected turbine engine comprising:
a core engine including a compressor section where an inlet airflow is compressed and communicated to a combustor section where the inlet airflow is mixed with fuel and ignited to generate a first gas flow that is expanded through a turbine section, the core engine having a core flow that extends from an inlet that receives the inlet airflow and through the compressor section, the combustor section and the turbine section;
a burner where a portion of the inlet flow is mixed with fuel and ignited to generate additional thermal energy in response to a determination of a predefined operating condition that utilizes additional thermal energy;
an evaporator where the thermal energy from at least the first gas flow is used to transform water into a first steam flow, wherein the first steam flow is injected into the core flow through the core engine; and
a condenser in communication with a cooling flow where water is extracted from first gas flow and communicated to the evaporator for transformation into the first steam flow.