초록 ▼

A particle separator which broadly includes: an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected to the intake

A particle separator which broadly includes: an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected to the intake passageway and a main air flow passageway connected to the intake passageway; the inner wall having a humped-shaped portion between the intake passageway and the main air flow passageway; the humped-shaped portion having a peak and a radius of curvature at any point on the hump-shaped portion of the inner wall after the peak corresponding to a degree of curvature of from about 30 to about 60 degrees; and a boundary layer control mechanism for providing active boundary layer control along the inner wall after the peak and within the main air flow passageway. Also provided is a method for providing active boundary layer flow control along the inner wall after the peak and within the main air flow passageway.

대표청구항 ▼

What is claimed is: 1. A particle separator comprising: an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected t

What is claimed is: 1. A particle separator comprising: an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected to the intake passageway and a main air flow passageway connected to the intake passageway; the inner wall having a humped-shaped portion between the intake passageway and the main air flow passageway; the humped-shaped portion having a peak and a radius of curvature at any point on the hump-shaped portion of the inner wall after the peak corresponding to a degree of curvature of from about 30 to about 60 degrees; and a boundary layer control mechanism for providing active boundary layer control along the inner wall after the peak and within the main air flow passageway wherein the boundary layer control mechanism injects a core mass flow along an inboard surface of the innerwall. 2. The separator of claim 1, wherein the boundary layer control mechanism comprises an air injection system. 3. The separator of claim 2, wherein the air injection system injects core engine inlet air flow into an injection area along the inner wall after the peak and within the main air flow passageway. 4. The separator of claim 2, wherein the air injection system injects compressor bleed air flow into an injection area along the inner wall after the peak and within the main air flow passageway. 5. A particle separator comprising: an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected to the intake passageway and a main air flow passageway connected to the intake passageway; the inner wall having a humped-shaped portion between the intake passageway and the main air flow passageway; the humped-shaped portion having a peak and a radius of curvature at any point on the hump-shaped portion of the inner wall after the peak corresponding to a degree of curvature of from about 30 to about 60 degrees; and a boundary layer control mechanism for providing active boundary layer control along the inner wall after the peak and within the main air flow passageway, wherein the boundary layer control mechanism comprises an air suction system that removes a portion of the boundary layer from a core airflow. 6. The separator of claim 5, wherein the air suction system removes core air flow from a suction area along the inner wall after the peak and within the main air flow passageway, to thereby cause suction on the boundary layer. 7. The separator of claim 6, wherein the suction area comprises a perforated area along the along the inner wall after the peak. 8. The separator of claim 1, having a splitter hiding height measured between the peak and the splitter of about 0.5 inches or greater. 9. The separator of claim 8, wherein the splitter hiding height is about 0.7 inches or greater. 10. The separator of claim 9, wherein the splitter hiding height is about 0.8 inches or greater. 11. The separator of claim 1, having a splitter angle measured between the peak and the splitter of about 8 degrees or greater. 12. The separator of claim 11, having a splitter angle of about 10 degrees or greater. 13. The separator of claim 12, having a splitter angle of about 13 degrees or greater. 14. A method comprising the following steps: (a) providing a particle separator comprising an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected to the intake passageway and a main air flow passageway connected to the intake passageway, the inner wall having a humped-shaped portion between the intake passageway and the main air flow passageway, the humped-shaped portion having a peak and a radius of curvature at any point on the hump-shaped portion of the inner wall after the peak corresponding to a degree of curvature of from about 30 to about 60 degrees; and (b) providing active boundary layer flow control along the inner wall after the peak and within the main air flow passageway by injecting a core mass flow along an inboard surface of the innerwall. 15. The method of claim 14, wherein the active boundary layer control comprises injecting air flow into the boundary layer at an injection area along the inner wall after the peak and within the main air flow passageway. 16. A method comprising the following steps: (a) providing a particle separator comprising an inner wall, an outer wall and a splitter, wherein the inner and outer walls define an air intake passageway, and wherein the splitter is positioned between the inner and outer walls so as to define a scavenge air flow passageway connected to the intake passageway and a main air flow passageway connected to the intake passageway, the inner wall having a humped-shaped portion between the intake passageway and the main air flow passageway, the humped-shaped portion having a peak and a radius of curvature at any point on the hump-shaped portion of the inner wall after the peak corresponding to a degree of curvature of from about 30 to about 60 degrees; and (b) providing active boundary layer flow control along the inner wall after the peak and within the main air flow passageway, wherein the active boundary layer flow control comprises removing a portion of the boundary layer from a core airflow at a suction area along the inner wall after the peak and within the main air flow passageway. 17. The method of claim 14 further comprising the following steps of: (c) removing core engine inlet air flow proximate the core engine inlet passageway; (d) pressurizing the core engine inlet air flow; and (e) injecting the pressurized core engine inlet air flow proximate the injection area. 18. The method of claim 14, further comprising the following steps of: (c) removing compressor bleed air flow; and (d) injecting compressor bleed air flow proximate the injection area. 19. The method of claim 14, wherein the separator has a splitter hiding height measured between the peak and the splitter of about 0.7 inches or greater. 20. The method of claim 14, wherein the separator has a splitter angle measured between the peak and the splitter of about 10 degrees or greater.