# US 12,215,624 B1 · Fluidic compressor inlet guide vane > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,215,624 B1 - Document ID: US12215624B1 - Status: Granted - Kind: B1 - Application number: 18/512,388 - Filed: 2023-11-17 - Granted: 2025-02-04 - Earliest claimed: 2023-11-17 - Assignees: Rtx Corporation - Applicants: Rtx Corporation - Inventors: Simon W. Evans; Brandon M. Evans - Web page: https://patentgrep.com/patent/US12215624B1 ## CPC - F02C 7/16: characterised by cooling medium - F02C 3/06: the compressor comprising only axial stages (F02C3/10 takes precedence) - F02C 3/30: Adding water, steam or other fluids {for influencing combustion, e.g. to obtain cleaner exhaust gases (F02C7/141, F02C7/30, F01D21/00, F01K21/04, F23D11/10 take precedence)} - F02C 3/305: {Increasing the power, speed, torque or efficiency of a gas turbine or the thrust of a turbojet engine by injecting or adding water, steam or other fluids (F01K21/04 takes precedence)} - F02C 7/141: of working fluid - F02C 7/143: before or between the compressor stages - F02C 7/1435: {by water injection} - F02C 7/18: the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} - F02C 7/185: {Cooling means for reducing the temperature of the cooling air or gas} - F05D 2220/323: for aircraft propulsion, e.g. jet engines - F05D 2260/212: by water injection - F05D 2270/08: to produce clean exhaust gases - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A propulsion system for an aircraft includes an intercooling system configured to inject water into a compressor section to reduce a temperature of a core airflow within the core flow path. The intercooling system includes a plurality of injectors for injecting water at a water injection angle relative to an airflow to generate a defined swirl of a combined airflow and water to the compressor section. ## Claims ### Claim 1 A propulsion system for an aircraft comprising: a core engine including a core flow path where air is compressed in a compressor section, communicated to a combustor section, mixed with fuel, and ignited to generate a high energy gas flow that is expanded through a turbine section, wherein the compressor section includes a low pressure compressor upstream of a high pressure compressor and an annular passage for directing an airflow from an exit of the low pressure compressor to an inlet of the high pressure compressor; and an intercooling system configured to inject water into the compressor section to reduce a temperature of a core airflow within the core flow path, wherein the intercooling system includes a plurality of injectors for injecting water at a water injection angle relative to an airflow to generate a defined swirl of a combined airflow and water to the compressor section and an actuator, coupled to at least one of the plurality of injectors, configured to move the one injector to change the water injection angle of the one at least one injector. ### Claim 2 (depends on 1) The propulsion system as recited in claim 1, wherein each of the plurality of injectors are movable independent of rotating portions of the compressor section to adjust the water injection angle relative to the airflow. ### Claim 3 (depends on 2) The propulsion system as recited in claim 2, wherein a mass of water through each of the plurality of injectors is variable to adjust the defined swirl of the combined airflow and water into the compressor section. ### Claim 4 (depends on 1) The propulsion system as recited in claim 1, wherein the water injection angle includes a circumferential component and an axial component. ### Claim 5 (depends on 1) The propulsion system as recited in claim 1, wherein the water injection angle for each of the plurality of injectors is the same. ### Claim 6 (depends on 1) The propulsion system as recited in claim 1, wherein the water injection angle for at least one of the plurality of injectors varies relative to others of the plurality of injectors. ### Claim 7 (depends on 1) The propulsion system as recited in claim 1, including a synchronization assembly to which the plurality of injectors is attached, wherein the synchronization assembly is actuatable to vary the water injection angle. ### Claim 8 (depends on 7) The propulsion system as recited in claim 7, wherein the plurality of injectors are spaced circumferentially apart about an inner radial surface of the annular passage. ### Claim 9 (depends on 7) The propulsion system as recited in claim 7, wherein the plurality of injectors are spaced circumferentially apart about both an inner radial surface and an outer radial surface of the annular passage. ### Claim 10 (depends on 7) The propulsion system as recited in claim 7, further comprising a plurality of exit guide vanes within the annular passage for directing airflow from the exit of the low pressure compressor, wherein the plurality of injectors are mounted to corresponding ones of the plurality of exit guide vanes. ### Claim 11 (depends on 10) The propulsion system as recited in claim 10, wherein each of the plurality of injectors are movable relative to the corresponding ones of the plurality of exit guide vanes for adjusting the water injection angle. ### Claim 12 (depends on 1) The propulsion system as recited in claim 1, further comprising a condenser arranged along the core flow path and configured to extract water from the high energy gas flow and an evaporator configured to receive a portion of the water extracted by the condenser to generate a steam flow, wherein the steam flow is injected into the core flow path upstream of the turbine section. ### Claim 13 A propulsion system for an aircraft comprising: a core engine including a core flow path where air is compressed in a compressor section, communicated to a combustor section, mixed with fuel, and ignited to generate a high energy gas flow that is expanded through a turbine section, wherein the compressor section includes a low pressure compressor upstream of a high pressure compressor; and an intercooling system configured to inject water into the compressor section to reduce a temperature of a core airflow within the core flow path, wherein the intercooling system includes a plurality of injectors for injecting water at a water injection angle relative to an airflow to generate a defined swirl of a combined airflow and water to the compressor section; an annular passage for directing an airflow from an exit of the low pressure compressor to an inlet of the high pressure compressor, wherein the plurality of injectors is disposed within the annular passage for generating the defined swirl of the combined airflow and water through the annular passage to the inlet of the high pressure compressor; and a synchronization assembly to which the plurality of injectors are attached, wherein the synchronization assembly is actuatable to vary the water injection angle and the plurality of injectors are spaced circumferentially apart about an outer radial surface of the annular passage. ### Claim 14 An intercooling system for a turbine engine comprising: a condenser arranged along a core flow path and configured to extract water from an exhaust gas flow; a pump where water from the condenser is pressurized; a plurality of injectors where a pressurized water flow is injected into the core flow path within a compressor section; and at least one actuator coupled to the plurality of injectors and a controller, wherein the controller is configured to control the actuator to move the plurality of injectors to vary a water injection angle relative to an inlet airflow and generate a defined swirl of a combined airflow and water to an inlet of the compressor section. ### Claim 15 (depends on 14) The intercooling system as recited in claim 14, including a synchronization ring to which the plurality of injectors are attached, wherein the synchronization ring is movable to vary the water injection angle. ### Claim 16 (depends on 14) The intercooling system as recited in claim 14, wherein the compressor section includes a low pressure compressor upstream of a high pressure compressor with an annular passage for directing an airflow from an exit of the low pressure compressor to an inlet of the high pressure compressor, wherein the plurality of injectors are spaced circumferentially apart about at least one of an outer radial surface and an inner radial surface of the annular passage. ### Claim 17 (depends on 16) The intercooling system as recited in claim 16, further comprising a plurality of exit guide vanes within the annular passage for directing airflow from the exit of the low pressure compressor, wherein the plurality of injectors are mounted to corresponding ones of the plurality of exit guide vanes. ### Claim 18 A method of operating a compressor section of a turbine engine comprising: generating a pressurized airflow through a first compressor section; injecting, using at least one injector coupled to an actuator, a pressurized water flow at a first water injection angle relative to the pressurized airflow generated in the first compressor section to generate a combined pressurized air and water flow with a resultant swirl angular flow component; communicating the combined pressurized air and water flow to a second compressor section downstream of the first compressor section; and based upon an engine operating point, controlling the actuator to move the at least one injector to change the first water injection angle to a second water injection angle. ### Claim 19 (depends on 18) The method as recited in claim 18, further comprising, adjusting a pressure of water injected to vary the resultant swirl angular flow component.