초록 ▼

A diffuser particle separator may be integrated into a gas turbine engine to remove corrosive dust and salt particles from the engine's core air flow. The air flow may pass over a series of particle accumulator entrance orifices, trapping particles in a particle accumulator while allowing the air fl

A diffuser particle separator may be integrated into a gas turbine engine to remove corrosive dust and salt particles from the engine's core air flow. The air flow may pass over a series of particle accumulator entrance orifices, trapping particles in a particle accumulator while allowing the air flow to continue unimpeded. Since dust deposits may become molten at high temperatures, removal of dust from the core and secondary airflow may be critical for long-life superalloy and ceramic components, particularly those with small diameter air-cooling holes and thermal barrier coatings.

대표청구항 ▼

We claim: 1. A diffuser particle separator within a turbine engine core, comprising: a diffuser-deswirler moving an air flow through an engine from the discharge of a compressor; at least one particle accumulator entrance orifice located directly upstream from a combustor and downstream from the co

We claim: 1. A diffuser particle separator within a turbine engine core, comprising: a diffuser-deswirler moving an air flow through an engine from the discharge of a compressor; at least one particle accumulator entrance orifice located directly upstream from a combustor and downstream from the compressor discharge, the at least one particle accumulator entrance orifice being impinged by the air flow; a particle accumulator in fluid communication with the particle accumulator entrance orifice, the particle accumulator accumulating and removing particles from the air flow; and a purge air duct in fluid communication with the particle accumulator, the purge air duct transporting the accumulated particles out of the engine core. 2. The diffuser particle separator according to claim 1, wherein the at least one particle accumulator entrance orifice comprises a plurality of particle accumulator entrance orifices formed along a wall of the diffuser. 3. The diffuser particle separator according to claim 1, wherein one of the diffuser-deswirler and the diffuser particle separator is made of a titanium alloy and one of an oxidation-resistant steel, a nickel-based superalloy and a cobalt-based superalloy. 4. The diffuser particle separator according to claim 1, wherein the diffuser particle separator is made with one of a ceramic and ceramic matrix composite material. 5. The diffuser particle separator according to claim 1, wherein the at least one particle accumulator entrance orifice is formed through the wall of a hollow toroidal-shaped particle accumulator. 6. The diffuser particle separator according to claim 5, wherein the particle accumulator is located just beyond the diffuser-deswirler exit. 7. The diffuser particle separator according to claim 5, further comprising an electrically charged electrode positioned within the particle accumulator. 8. The diffuser particle separator according to claim 1, wherein each particle accumulator entrance orifice width ranges from 0.005 to 0.05 inches. 9. The diffuser particle separator according to claim 1, further comprising a purge air valve for controlling an air flow through the purge air duct. 10. A diffuser particle separator within a turbine engine core comprising: a hollow toroidal-shaped particle accumulator located in a diffuser-deswirler air flow located directly upstream from a combustor. a plurality of particle accumulator entrance orifices formed through a surface of the accumulator which is impinged by the diffuser-deswirler air flow, the orifices communicating an exterior of the particle accumulator with an interior portion thereof and allowing particles to pass into the accumulator; and a purge air duct connecting the interior of accumulator to the atmosphere, the purge air duct transporting accumulated particles out of the engine core. 11. The diffuser particle separator according to claim 10, further comprising an electrically charged rod positioned within the particle accumulator. 12. The diffuser particle separator according to claim 10, wherein each of the plurality of particle accumulator entrance orifice widths ranges from 0.005 to 0.050 inches. 13. A diffuser particle separator within a turbine engine core comprising: a first set of particle accumulator entrance orifices formed through an inner wall portion of a diffuser-deswirler, the diffuser-deswirler being located directly upstream from a combustor; a first particle accumulator in fluid communication with the first set of particle accumulator entrance orifices, the accumulator collecting and removing particles from an air flow passing through the diffuser-deswirler; and a purge air duct connecting the first particle accumulator with the atmosphere, the purge air duct transporting accumulated particles out of the engine core. 14. The diffuser particle separator according to claim 13, wherein the first set of particle accumulator entrance orifices is located upstream of a bend in the diffuser-deswirler prior to a diffuser-deswirler exit. 15. The diffuser particle separator according to claim 13, wherein the first set of particle accumulator entrance orifices is located at a diffuser-deswirler inlet. 16. The diffuser particle separator according to claim 13, further comprising: a second set of particle accumulator entrance orifices formed through an outer wall portion of the diffuser near a diffuser-deswirler exit; a second particle accumulator in fluid communication with the second set of particle accumulator entrance orifices, the second accumulator collecting and removing particles from an air flow through the diffuser; and a second purge air duct connecting the second particle accumulator with the atmosphere, the second purge air duct transporting accumulated particles out of an engine core. 17. A diffuser particle separator within a turbine engine core comprising: a first set of particle accumulator entrance orifices directly upstream from a combustor and formed through an outer wall portion of the diffuser particle separator near an exit of a diffuser-deswirler exit; a first particle accumulator in fluid communication with the first set of particle accumulator entrance orifices, the first particle accumulator collecting and removing particles from an air flow through the diffuser deswirler; and a purge air duct connecting the first particle accumulator with the atmosphere, the purge air duct transporting accumulated particles out of the engine core. 18. The diffuser particle separator according to claim 17, further comprising: a second set of particle accumulator entrance orifices formed through an inner wall portion of a diffuser-deswirler; and a second particle accumulator in fluid communication with the second set of particle accumulator entrance orifices, the second particle accumulator collecting and removing particles from an air flow through the diffuser-deswirler. 19. A gas turbine engine comprising the diffuser particle separator according to claim 1. 20. The gas turbine engine according to claim 19, wherein the at least one particle accumulator entrance orifice is a plurality of particle accumulator entrance orifices formed through a wall in the diffuser-deswirler. 21. The gas turbine engine according to claim 19, wherein the at least one particle accumulator entrance orifice is formed through the wall of a toroidal-shaped particle accumulator. 22. The gas turbine engine according to claim 21, wherein the particle accumulator is located just beyond the diffuser-deswirler exit, wherein airflow from the diffuser may impinge upon the at least one particle accumulator entrance orifice. 23. The gas turbine engine according to claim 21, further comprising an electrically charged electrode positioned within the particle accumulator. 24. The gas turbine engine according to claim 19, wherein each particle accumulator entrance orifice width is from 0.005 to 0.05 inches.