Abstract: A first cascade segment of a thrust reverser system has a first cascade segment flow area and is associated with a first lateral sector. A second cascade segment has a second cascade segment flow area and is associated with a second lateral sector. The second cascade segment flow area may be at least 1.2 times the first cascade segment flow area. The first lateral sector has a first leakage flow area and a first total flow area that is equal to a sum of at least the first cascade segment flow area and the first leakage flow area. The second lateral sector has a second leakage flow area and a second total flow area that is equal to a sum of at least the second cascade segment flow area and the second leakage flow area. The second total flow area may be within 10% of the first total flow area.

Abstract: A bullnose ramp is disclosed. In various embodiments, the bullnose ramp includes a forward portion, the forward portion characterized by a first profile; an aft portion, the aft portion characterized by a second profile; and a transition portion positioned proximate an intersection between the forward portion and the aft portion, the transition portion defining a change in slope between the first profile and the second profile.

Abstract: An assembly is provided for an aircraft propulsion system. This assembly includes a forward thrust duct and a thrust reverser system. The thrust reverser system includes a thrust reverser duct, a bullnose ramp and a plurality of protrusions. The bullnose ramp is adapted to provide a transition from the forward thrust duct to the thrust reverser duct when the thrust reverser system is in a deployed configuration. The protrusions are bonded or formed integral with the bullnose ramp. Each of the protrusions is adapted to interact with boundary layer fluid flowing along the bullnose ramp from the forward thrust duct into the thrust reverser duct when the thrust reverser system is in a deployed configuration.

Abstract: An assembly is provided for an aircraft propulsion system. This assembly includes a fixed structure and a nacelle. The nacelle includes a first fan cowl and a first thrust reverser section adjacent the first fan cowl. The first fan cowl is movably attached to and arranged on a first side of the fixed structure. The first fan cowl is configured to move between a first fan cowl closed position and a first fan cowl second position. The first thrust reverser section is movably attached to and arranged on the first side of the fixed structure. The first thrust reverser section is configured to move between a first thrust reverser section closed position and a first thrust reverser section open position when the first fan cowl is in the first fan cowl closed position.

Abstract: An assembly is provided for an aircraft propulsion system. The assembly includes a nacelle inlet structure with an internal cavity. The assembly also includes a nozzle configured to direct fluid into the internal cavity through a plurality of ports that include one or more first ports and at least one second port. The nozzle includes a trunk conduit, a first branch conduit and a second branch conduit. The first branch conduit and the second branch conduit are fluidly coupled in parallel to the trunk conduit. The first branch conduit includes the first port(s). The second branch conduit includes the second port.

Abstract: An assembly is provided for an aircraft propulsion system. This aircraft propulsion system assembly includes a thrust reverser system. The thrust reverser system includes a cascade structure and a scoop. The cascade structure is configured with a plurality of flow passages. Each of the flow passages extends through the cascade structure. The flow passages include a first flow passage. The scoop is configured to direct fluid into at least the first flow passage. The scoop includes a serrated leading edge.

Abstract: A first cascade segment of a thrust reverser system has a first cascade segment flow area and is associated with a first lateral sector. A second cascade segment has a second cascade segment flow area and is associated with a second lateral sector. The second cascade segment flow area may be at least 1.2 times the first cascade segment flow area. The first lateral sector has a first leakage flow area and a first total flow area that is equal to a sum of at least the first cascade segment flow area and the first leakage flow area. The second lateral sector has a second leakage flow area and a second total flow area that is equal to a sum of at least the second cascade segment flow area and the second leakage flow area. The second total flow area may be within 10% of the first total flow area.

Abstract: An assembly is provided for an aircraft propulsion system. This aircraft propulsion system assembly includes a thrust reverser system. The thrust reverser system includes a cascade structure and a scoop. The cascade structure is configured with a plurality of flow passages. Each of the flow passages extends through the cascade structure. The flow passages include a first flow passage. The scoop is configured to direct fluid into at least the first flow passage. The scoop includes a serrated leading edge.

Abstract: An injector head for an anti-icing system may comprise a body configured to receive a pressurized gas, wherein the body is configured to provide the pressurized gas through a bulkhead into an interior volume of a D-duct, a first nozzle configured to generate a first flow of a first portion of the pressurized gas, a second nozzle configured to generate a second flow of a second portion of the pressurized gas, and a third nozzle configured to generate a third flow of a third portion of the pressurized gas, wherein the first nozzle is located at a distal end of the body relative to the bulkhead, and wherein a first hydraulic diameter of the first nozzle is less than each of a second hydraulic diameter of the second nozzle and a third hydraulic diameter of the third nozzle.

Abstract: A bullnose ramp is disclosed. In various embodiments, the bullnose ramp includes a forward portion, the forward portion characterized by a first profile; an aft portion, the aft portion characterized by a second profile; and a transition portion positioned proximate an intersection between the forward portion and the aft portion, the transition portion defining a change in slope between the first profile and the second profile.

Abstract: An assembly is provided for an aircraft propulsion system. This assembly includes a forward thrust duct and a thrust reverser system. The thrust reverser system includes a thrust reverser duct, a bullnose ramp and a plurality of protrusions. The bullnose ramp is adapted to provide a transition from the forward thrust duct to the thrust reverser duct when the thrust reverser system is in a deployed configuration. The protrusions are bonded or formed integral with the bullnose ramp. Each of the protrusions is adapted to interact with boundary layer fluid flowing along the bullnose ramp from the forward thrust duct into the thrust reverser duct when the thrust reverser system is in a deployed configuration.

Abstract: An assembly is provided for an aircraft propulsion system. This assembly includes a fixed structure and a nacelle. The nacelle includes a first fan cowl and a first thrust reverser section adjacent the first fan cowl. The first fan cowl is movably attached to and arranged on a first side of the fixed structure. The first fan cowl is configured to move between a first fan cowl closed position and a first fan cowl second position. The first thrust reverser section is movably attached to and arranged on the first side of the fixed structure. The first thrust reverser section is configured to move between a first thrust reverser section closed position and a first thrust reverser section open position when the first fan cowl is in the first fan cowl closed position.

Abstract: An injector head for an anti-icing system may comprise a body configured to receive a pressurized gas, wherein the body is configured to provide the pressurized gas through a bulkhead into an interior volume of a D-duct, a first nozzle configured to generate a first flow of a first portion of the pressurized gas, a second nozzle configured to generate a second flow of a second portion of the pressurized gas, and a third nozzle configured to generate a third flow of a third portion of the pressurized gas, wherein the first nozzle is located at a distal end of the body relative to the bulkhead, and wherein a first hydraulic diameter of the first nozzle is less than each of a second hydraulic diameter of the second nozzle and a third hydraulic diameter of the third nozzle.

Abstract: An assembly is provided for an aircraft propulsion system. The assembly includes a nacelle inlet structure with an internal cavity. The assembly also includes a nozzle configured to direct fluid into the internal cavity through a plurality of ports that include one or more first ports and at least one second port. The nozzle includes a trunk conduit, a first branch conduit and a second branch conduit. The first branch conduit and the second branch conduit are fluidly coupled in parallel to the trunk conduit. The first branch conduit includes the first port(s). The second branch conduit includes the second port.

Abstract: A cascade box is provided that includes a plurality of lengthwise extending side turning vanes and a plurality of forward turning vanes. Each of the plurality of lengthwise extending side turning vanes is configured to have a side turning angle. Each of the plurality of forward turning vanes is attached to respective adjacent ones of the plurality of side turning vanes, and each forward turning vane is configured to have a forward turning angle, and at least one of the forward turning vanes is configured to have a negative forward turning angle.

Abstract: An assembly is provided for an aircraft propulsion system. This assembly includes an inlet lip for a nacelle inlet structure, a bulkhead and a nozzle. The bulkhead is configured with the inlet lip to form a cavity between the inlet lip and the bulkhead. The nozzle includes a distribution conduit and one or more nozzle ports. The distribution conduit projects longitudinally out from the bulkhead and into the cavity along a conduit centerline. At least a first portion of the distribution conduit tapers as the distribution conduit extends longitudinally along the conduit centerline. The first portion of the distribution conduit has an elongated geometry in a plane perpendicular to the conduit centerline. The one or more nozzle ports are arranged longitudinally along the conduit centerline and fluidly coupled with an internal passage of the distribution conduit.

Abstract: An injector head for an anti-icing system may comprise a body having a first surface, a second surface, a face, and an inlet, a first sweeping jet nozzle having a first exit port through the face, wherein the first sweeping jet nozzle comprises a fluid oscillator defining a first sweeping plane of the first sweeping jet nozzle, and a distribution manifold within the body in fluid communication with the inlet and the first sweeping jet nozzle.

Abstract: A cascade box is provided that includes a plurality of lengthwise extending side turning vanes and a plurality of forward turning vanes. Each of the plurality of lengthwise extending side turning vanes is configured to have a side turning angle. Each of the plurality of forward turning vanes is attached to respective adjacent ones of the plurality of side turning vanes, and each forward turning vane is configured to have a forward turning angle, and at least one of the forward turning vanes is configured to have a negative forward turning angle.

Abstract: An assembly is provided for an aircraft propulsion system. This assembly includes an inlet lip for a nacelle inlet structure, a bulkhead and a nozzle. The bulkhead is configured with the inlet lip to form a cavity between the inlet lip and the bulkhead. The nozzle includes a distribution conduit and one or more nozzle ports. The distribution conduit projects longitudinally out from the bulkhead and into the cavity along a conduit centerline. At least a first portion of the distribution conduit tapers as the distribution conduit extends longitudinally along the conduit centerline. The first portion of the distribution conduit has an elongated geometry in a plane perpendicular to the conduit centerline. The one or more nozzle ports are arranged longitudinally along the conduit centerline and fluidly coupled with an internal passage of the distribution conduit.

Abstract: An injector head for an anti-icing system may comprise a body having a first surface, a second surface, a face, and an inlet, a first sweeping jet nozzle having a first exit port through the face, wherein the first sweeping jet nozzle comprises a fluid oscillator defining a first sweeping plane of the first sweeping jet nozzle, and a distribution manifold within the body in fluid communication with the inlet and the first sweeping jet nozzle.