IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0386025
(2010-07-19)
|
등록번호 |
US-9222485
(2015-12-29)
|
국제출원번호 |
PCT/US2010/042474
(2010-07-19)
|
§371/§102 date |
20120119
(20120119)
|
국제공개번호 |
WO2011/011335
(2011-01-27)
|
발명자
/ 주소 |
- Brown, Paul C.
- Grigoriev, Mikhail
- Swiatek, Chester V.
|
출원인 / 주소 |
|
대리인 / 주소 |
Taft, Stettinius & Hollister LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
A system, in certain embodiments, includes a centrifugal compressor diffuser vane including a leading edge, a trailing edge, and a constant thickness section extending between the leading edge and the trailing edge. A radius of curvature of the leading edge and a radius of curvature of the trailing
A system, in certain embodiments, includes a centrifugal compressor diffuser vane including a leading edge, a trailing edge, and a constant thickness section extending between the leading edge and the trailing edge. A radius of curvature of the leading edge and a radius of curvature of the trailing edge vary along a span of the vane. A ratio of a length of the constant thickness section to a chord length of the vane is at least approximately 50%, and the ratio is substantially constant along the span of the vane.
대표청구항
▼
1. A system comprising: a centrifugal compressor diffuser vane, comprising: a leading edge disposed between pressure and suction surfaces and extending along a span of the centrifugal compressor diffuser vane in a span direction from a vane root to a vane tip;a trailing edge disposed between the pre
1. A system comprising: a centrifugal compressor diffuser vane, comprising: a leading edge disposed between pressure and suction surfaces and extending along a span of the centrifugal compressor diffuser vane in a span direction from a vane root to a vane tip;a trailing edge disposed between the pressure and suction surfaces and extending along the span of the centrifugal compressor diffuser vane in the span direction from the vane root to the vane tip; anda constant thickness section disposed between the pressure and suction surfaces and extending along a camber line between the leading edge and the trailing edge, wherein a ratio of a length of the constant thickness section to a chord length of the centrifugal compressor diffuser vane is at least approximately 50%, wherein the ratio is constant in the span direction along the span of the centrifugal compressor diffuser vane, wherein the chord length varies in the span direction along the span of the centrifugal compressor diffuser vane, wherein the centrifugal compressor diffuser vane comprises at least one of:a curvature extending in the span direction along at least one of the leading edge or the trailing edge; orthe leading and trailing edges gradually extending in a common direction along the camber line as the centrifugal compressor diffuser vane extends in the span direction from the vane root to the vane tip; ora length along the camber line of at least one of the constant thickness section, a tapered leading edge section, or a tapered trailing edge section, varying in the span direction; orthe tapered leading and trailing edge sections each converging from the pressure and suction surfaces toward the camber line; ora curved profile at a tip of at least one of the leading edge or the trailing edge, wherein the curved profile has a radius of curvature that varies in the span direction; orany combination thereof. 2. The system of claim 1, wherein a camber angle of the centrifugal compressor diffuser vane varies in the span direction along the span of the centrifugal compressor diffuser vane. 3. The system of claim 1, wherein a first radius of curvature of the leading edge is selected to reduce an incidence angle between a fluid flow and the leading edge compressor diffuser vane. 4. The system of claim 1, wherein a circumferential position of the leading edge, a circumferential position of the trailing edge, or a combination thereof, varies in the span direction along the span of the centrifugal compressor diffuser vane. 5. The system of claim 1, wherein a radial position of the leading edge, a radial position of the trailing edge, or a combination thereof, varies in the span direction along the span of the centrifugal compressor diffuser vane. 6. The system of claim 1, comprising a centrifugal compressor diffuser including a plurality of centrifugal compressor diffuser vanes disposed about a hub and/or an impeller in an annual arrangement. 7. The system of claim 6, wherein a circumferential spacing between each pair of adjacent vanes of the plurality of centrifugal compressor diffuser vanes is equal. 8. The system of claim 6, wherein a circumferential spacing between the plurality of centrifugal compressor diffuser vanes is uneven. 9. The system of claim 6, wherein a distance between the leading edge and the impeller varies in the span direction along the span of each vane of the plurality of centrifugal compressor diffuser vanes. 10. The system of claim 6, wherein a distance between the trailing edge and the impeller varies in the span direction along the span of each vane of the plurality of centrifugal compressor diffuser vanes. 11. The system of claim 6, wherein each vane of the plurality of centrifugal compressor diffuser vanes is angled approximately between 10 to 30 degrees relative to a circumferential axis of the hub. 12. The system of claim 1, wherein the centrifugal compressor diffuser vane has the leading and trailing edges gradually extending in the common direction along the camber line as the centrifugal compressor diffuser vane extends in the span direction from the vane root to the vane tip. 13. The system of claim 1, wherein the centrifugal compressor diffuser vane has the length along the camber line of at least one of the constant thickness section, the tapered leading edge section, or the tapered trailing edge section, varying in the span direction. 14. The system of claim 1, wherein the centrifugal compressor diffuser vane has the tapered leading and trailing edge sections each converging from the pressure and suction surfaces toward the camber line. 15. The system of claim 1, wherein the centrifugal compressor diffuser vane has two or more of: the curvature extending in the span direction along at least one of the leading edge or the trailing edge; orthe leading and trailing edges gradually extending in the common direction along the camber line as the centrifugal compressor diffuser vane extends in the span direction from the vane root to the vane tip; orthe length along the camber line of at least one of the constant thickness section, the tapered leading edge section, or the tapered trailing edge section, varying in the span direction; orthe tapered leading and trailing edge sections each converging from the pressure and suction surfaces toward the camber line; orthe curved profile at the tip of at least one of the leading edge or the trailing edge, wherein the curved profile has the radius of curvature that varies in the span direction. 16. A system comprising: a centrifugal compressor diffuser vane, comprising: a leading edge disposed between pressure and suction surfaces and extending along a span of the centrifugal compressor diffuser vane in a span direction from a vane root to a vane tip;a trailing edge disposed between the pressure and suction surfaces and extending along the span of the centrifugal compressor diffuser vane in the span direction from the vane root to the vane tip;a constant thickness section disposed between the pressure and suction surfaces and extending along a camber line between the leading edge and the trailing edge, wherein a ratio of a length of the constant thickness section to a chord length of the centrifugal compressor diffuser vane is at least approximately 50%, wherein the centrifugal compressor diffuser vane comprises at least one of:a curvature extending in the span direction along at least one of the leading edge or the trailing edge; orthe leading and trailing edges gradually extending in a common direction along the camber line as the centrifugal compressor diffuser vane extends in the span direction from the vane root to the vane tip; ora length along the camber line of at least one of the constant thickness section, a tapered leading edge section, or a tapered trailing edge section, varying in the span direction; orthe tapered leading and trailing edge sections each converging from the pressure and suction surfaces toward the camber line; ora curved profile at a tip of at least one of the leading edge or the trailing edge, wherein the curved profile has a radius of curvature that varies in the span direction; orany combination thereof;wherein a camber angle of the centrifugal compressor diffuser vane varies in the span direction along the span of the centrifugal compressor diffuser vane; andwherein a first radius of curvature of the leading edge, a second radius of curvature of the trailing edge, the camber angle, or a combination thereof, is selected based on a two-dimensional transformation of an axial flat plate to a radial flow configuration. 17. A system comprising: a centrifugal compressor diffuser, comprising: a hub; anda plurality of vanes extending from the hub in an axial direction, wherein each vane of the plurality of vanes includes a tapered leading edge section extending along a camber line, a tapered trailing edge section extending along the camber line, and a constant thickness section extending along the camber line between the tapered leading edge section and the tapered trailing edge section, wherein the constant thickness section has a first length along the camber line greater than approximately 50% of a vane chord length, and wherein a second length along the camber line of the tapered leading edge section, a third length along the camber line of the tapered trailing edge section, and the first length along the camber line of the constant thickness section vary in a span direction from a vane root to a vane tip along a span of each vane of the plurality of vanes. 18. The system of claim 17, wherein the plurality of vanes is disposed about the hub in an annual arrangement, and wherein a circumferential spacing between each pair of adjacent vanes of the plurality of vanes is equal. 19. The system of claim 17, wherein each vane of the plurality of vanes is angled approximately between 10 to 30 degrees relative to a circumferential axis of the hub. 20. The system of claim 17, wherein a camber angle of each vane of the plurality of vanes varies in the span direction from the vane root to the vane tip along the span of each vane of the plurality of vanes. 21. The system of claim 20, wherein the second length along the camber line of the tapered leading edge section, the third length along the camber line of the tapered trailing edge section, the camber angle, or a combination thereof, is selected based on a two-dimensional transformation of an axial flat plate to a radial flow configuration. 22. The system of claim 17, wherein a ratio of the first length along the camber line of the constant thickness section to the vane chord length is constant along the span of each vane of the plurality of vanes. 23. A system comprising: a centrifugal compressor, comprising: an impeller; anda diffuser disposed about the impeller, wherein the diffuser comprises a plurality of vanes, each vane of the plurality of vanes comprises a leading edge, a trailing edge, and a constant thickness intermediate section extending along a camber line between the leading edge and the trailing edge, wherein a ratio of a length of the constant thickness intermediate section to a chord length of the centrifugal compressor diffuser vane is at least approximately 50%, wherein the ratio is constant in the span direction along the span of the centrifugal compressor diffuser vane, wherein the chord length varies in the span direction along the span of the centrifugal compressor diffuser vane, wherein each vane of the plurality of vanes comprisesa curvature extending in a span direction from a vane root to a vane tip of the vane along at least one of the leading edge or the trailing edge. 24. The system of claim 23, wherein each vane of the plurality of vanes comprises the leading and trailing edges gradually extending in a common direction along the camber line as the vane extends in the span direction from the vane root to the vane tip. 25. The system of claim 23, wherein each vane of the plurality of vanes comprises a length along the camber line of at least one of the constant thickness intermediate section, the tapered leading edge section, or the tapered trailing edge section, varying in the span direction. 26. The system of claim 23, wherein each vane of the plurality of vanes comprises tapered leading and trailing edge sections each converging from the pressure and suction surfaces of the vane toward the camber line. 27. A system comprising: a centrifugal compressor, comprising: an impeller; anda diffuser disposed about the impeller, wherein the diffuser comprises a plurality of vanes, each vane of the plurality of vanes comprises a leading edge, a trailing edge, and a constant thickness intermediate section extending along a camber line between the leading edge and the trailing edge, wherein a ratio of a length of the constant thickness intermediate section to a chord length of the centrifugal compressor diffuser vane is at least approximately 50%, wherein the ratio is constant in the span direction along the span of the centrifugal compressor diffuser vane, wherein the chord length varies in the span direction along the span of the centrifugal compressor diffuser vane, wherein each vane of the plurality of vanes comprises a curved profile at a tip of at least one of the leading edge or the trailing edge, wherein the curved profile has a radius of curvature that varies in the span direction from the vane root to the vane tip. 28. A system comprising: a centrifugal compressor diffuser vane, comprising: a leading edge disposed between pressure and suction surfaces and extending along a span of the centrifugal compressor diffuser vane in a span direction from a vane root to a vane tip;a trailing edge disposed between the pressure and suction surfaces and extending along the span of the centrifugal compressor diffuser vane in the span direction from the vane root to the vane tip; anda constant thickness section disposed between the pressure and suction surfaces and extending along a camber line between the leading edge and the trailing edge, wherein a ratio of a length of the constant thickness section to a chord length of the centrifugal compressor diffuser vane is at least approximately 50%, wherein the ratio is constant in the span direction along the span of the centrifugal compressor diffuser vane, wherein the chord length varies in the span direction along the span of the centrifugal compressor diffuser vane, wherein the centrifugal compressor diffuser vane has a curvature extending in the span direction along at least one of the leading edge or the trailing edge. 29. A system comprising: a centrifugal compressor diffuser vane, comprising: a leading edge disposed between pressure and suction surfaces and extending along a span of the centrifugal compressor diffuser vane in a span direction from a vane root to a vane tip;a trailing edge disposed between the pressure and suction surfaces and extending along the span of the centrifugal compressor diffuser vane in the span direction from the vane root to the vane tip; anda constant thickness section disposed between the pressure and suction surfaces and extending along a camber line between the leading edge and the trailing edge, wherein a ratio of a length of the constant thickness section to a chord length of the centrifugal compressor diffuser vane is at least approximately 50%, wherein the ratio is constant in the span direction along the span of the centrifugal compressor diffuser vane, wherein the chord length varies in the span direction along the span of the centrifugal compressor diffuser vane, wherein the centrifugal compressor diffuser vane has a curved profile at a tip of at least one of the leading edge or the trailing edge, wherein the curved profile has a radius of curvature that varies in the span direction.
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