Aircraft structure having an improved inlet opening for engine air
AssigneeAirbus Defence and Space GmbH
InventorsSebastian Ritter, Robert Ehrmayr, Robert Osterhuber
Life of this patent
Estimating the term…
Abstract
An aircraft structure having a fuselage, an engine and an air inlet for receiving air for the engine. The air inlet has a cowl which surrounds an inlet opening. The air inlet has a compression surface and a transition shoulder. The air inlet additionally has a flow guide surface, which is arranged as a local elevation in a region of the transition shoulder and extends into the inlet opening. This flow guide surface designed as a local elevation contributes to improving the displacement of the boundary layer of a fluid flowing along the aircraft structure at the air inlet.
Claims9
An aircraft structure comprising:
- a fuselage;
- an engine;
- an air inlet with an inlet opening for receiving air for the engine and a cowl surrounding the inlet opening;
- wherein the air inlet comprises a compression surface and a transition shoulder, which are configured to deflect a boundary layer of an air flow from the inlet opening during operation of the aircraft structure;
- wherein the air inlet has a flow guide surface;
- wherein the flow guide surface is configured as a local elevation in a region of the transition shoulder and extends into the inlet opening;
- wherein the flow guide surface, in a cross-sectional view of the aircraft structure, is distinguished by a width and a height relative to the transition shoulder;
- wherein the flow guide surface, in the cross-sectional view together with the transition shoulder, forms a first contour line in a transverse direction;
- wherein the first contour line on the flow guide surface is distinguished by a change in a curvature profile;
- wherein the flow guide surface extends into the inlet opening in a longitudinal sectional view of the aircraft structure;
- and
- wherein a front end of the flow guide surface in the longitudinal sectional view of the aircraft structure protrudes over a front edge of the cowl from the inlet opening.
An aircraft structure comprising:
- a fuselage;
- an engine;
- an air inlet with an inlet opening for receiving air for the engine and a cowl surrounding the inlet opening;
- wherein the air inlet comprises a compression surface and a transition shoulder, which are configured to deflect a boundary layer of an air flow from the inlet opening during operation of the aircraft structure;
- wherein the air inlet has a flow guide surface;
- wherein the flow guide surface is configured as a local elevation in a region of the transition shoulder and extends into the inlet opening;
- wherein the flow guide surface, in a cross-sectional view of the aircraft structure, is distinguished by a width and a height relative to the transition shoulder;
- wherein the flow guide surface, in the cross-sectional view together with the transition shoulder, forms a first contour line in a transverse direction;
- wherein the first contour line on the flow guide surface is distinguished by a change in a curvature profile;
- wherein the air inlet has a flow divider;
- wherein the flow divider is in the inlet opening and the inlet opening is divided into at least two regions;
- and
- wherein the flow guide surface is at a forward end of the flow divider.
Dependencies are inferred from the claim text.