Pelton bucket, Pelton wheel and a method of making and using the Pelton bucket. The Pelton bucket includes at least one exit edge. The at least one exit edge includes one of at least one partially concavely curved portion and at least one straight portion. The method of making provides for arranging
Pelton bucket, Pelton wheel and a method of making and using the Pelton bucket. The Pelton bucket includes at least one exit edge. The at least one exit edge includes one of at least one partially concavely curved portion and at least one straight portion. The method of making provides for arranging at least one exit edge on the Pelton bucket. The method of using provides for causing rotation of a Pelton wheel with a Pelton turbine wherein the Pelton wheel utilizes a plurality of Pelton buckets and wherein the method provides for directing a jet from the Pelton turbine to the Pelton bucket to cause the Pelton wheel to rotate.
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The invention claimed is: 1. A Pelton bucket comprising: a front edge; a rear edge; at least one exit edge extending between the front and rear edges; the at least one exit edge comprising one of: at least one partially concavely curved portion; and at least one straight portion, wherein the at lea
The invention claimed is: 1. A Pelton bucket comprising: a front edge; a rear edge; at least one exit edge extending between the front and rear edges; the at least one exit edge comprising one of: at least one partially concavely curved portion; and at least one straight portion, wherein the at least one exit edge comprises a portion below an imaginary line extending between the front and the rear edges of the Pelton bucket. 2. The Pelton bucket of claim 1, wherein the Pelton bucket is arranged on a Pelton wheel. 3. The Pelton bucket of claim 1, wherein the at least one exit edge comprises the at least one straight portion and wherein the at least one straight portion comprises a plurality of straight portions. 4. The Pelton bucket of claim 3, wherein one of the plurality of straight portions is arranged at an angle to another of the plurality of straight portions. 5. The Pelton bucket of claim 1, wherein a portion of the at least one exit edge in the region of a bucket base is arranged above the imaginary line extending between the front and the rear edges of the Pelton bucket. 6. The Pelton bucket of claim 1, wherein a portion of the at least one exit edge in a region of a mean circular jet diameter is arranged below the imaginary line extending between the front and the rear edges of the Pelton bucket. 7. The Pelton bucket of claim 1, wherein the at least one exit edge comprises the at least one partially concavely curved portion and wherein the front edge is arranged on a bucket face and arranged at a greater distance from a lower most part of an inner surface of the Pelton bucket than a lower most part of the at least partially concavely curved portion. 8. The Pelton bucket of claim 1, wherein the at least one exit edge comprises the at least one partially concavely curved portion and wherein the front edge is arranged on a bucket face, wherein the at least partially concavely curved portion extends to a region of the front edge, whereby in the region, a part of the at least partially concavely curved portion is arranged at a greater distance from a lower most part of an inner surface of the Pelton bucket than a lower most part of the at least partially concavely curved portion. 9. The Pelton bucket of claim 1, wherein the at least one exit edge further comprises at least one partially convexly curved portion. 10. The Pelton bucket of claim 1, wherein the Pelton bucket comprises two exit edges which extend to the front edge of a bucket face of the Pelton bucket and wherein at least one of the two exit edges comprises one of at least one partially concavely curved portion and at least one straight portion, wherein the at least one of the two exit edges comprises a portion that is arranged below the imaginary line extending between the front and the rear edges of the Pelton bucket. 11. The Pelton bucket of claim 1, wherein the at least one exit edge comprises the at least one straight portion and wherein the at least one straight portion forms part of a polygonal shaped exit edge. 12. The Pelton bucket of claim 1, wherein the at least one exit edge is adapted to produce a jet outflow angle having a minimum jet exit speed radial component. 13. The Pelton bucket of claim 1, wherein the at least one exit edge comprises a shape that is adapted to produce a jet outflow angle having a maximum deflection relative to 180 degrees. 14. The Pelton bucket of claim 1, wherein the at least one exit edge is adapted to produce a flow having an optimal angular profile. 15. A method of causing rotation of a Pelton wheel with a Pelton turbine wherein the Pelton wheel utilizes a plurality of Pelton buckets of claim 1, the method comprising: directing a jet from the Pelton turbine to the Pelton bucket to cause the Pelton wheel to rotate. 16. The method of claim 15, further comprising producing, with the at least one exit edge, a jet outflow angle having a minimum jet exit speed radial component. 17. The method of claim 15, further comprising producing, with the at least one exit edge, a jet outflow angle having a maximum deflection relative to 180 degrees. 18. The method of claim 15, further comprising producing, with the at least one exit edge, a flow having an optimal angular profile. 19. The Pelton bucket of claim 1, wherein a contour of the at least one exit edge has an outflow angle which minimizes a radial component of an exit speed. 20. The Pelton bucket of claim 1, wherein a portion of the at least one exit edge in the region of a bucket face is arranged above the imaginary line extending between the front and the rear edges of the Pelton bucket. 21. A method of making a Pelton bucket, the method comprising: arranging at least one exit edge between front and rear edges on the Pelton bucket, wherein the at least one exit edge includes one of at least one partially concavely curved portion and at least one straight portion, and wherein the at least one exit edge comprises a portion that is arranged below an imaginary line extending between the front and the rear edges of the Pelton bucket. 22. The method of claim 21, further comprising arranging the Pelton bucket on a Pelton wheel. 23. The method of claim 21, wherein the at least one exit edge comprises at least one straight portion and further comprising forming the at least one exit edge with additional straight portions. 24. The method of claim 23, further comprising arranging one of the additional straight portions at an angle to another of the additional straight portions. 25. The method of claim 21, wherein a portion of the at least one exit edge in a region of a mean circular jet diameter is below the imaginary line extending between the front and the rear edges of the Pelton bucket. 26. The method of claim 21, wherein the at least one exit edge comprises the at least one partially concavely curved portion and further comprising arranging the front edge on a bucket face at a greater distance from a lower most part of an inner surface of the Pelton bucket than a lower most part of the at least partially concavely curved portion. 27. The method of claim 21, wherein the at least one exit edge comprises the at least one partially concavely curved portion and further comprising: arranging the front edge on a bucket face, wherein the at least partially concavely curved portion extends to a region of the front edge; and arranging, in the region, a part of the at least partially concavely curved portion at a greater distance from a lower most part of an inner surface of the Pelton bucket than a lower most part of the at least partially concavely curved portion. 28. The method of claim 21, wherein the at least one exit edge comprises the at least one partially concavely curved portion and wherein the method further comprises arranging at least a partially convexly curved portion on the at least one exit edge. 29. The method of claim 21, wherein the at least one exit edge comprises at least one straight portion and wherein the method further comprises arranging at least a partially convexly curved portion on the at least one exit edge. 30. The method of claim 21, wherein the at least one exit edge comprises at least one straight portion and wherein the method further comprises forming the at least one exit edge to have a polygonal shaped edge. 31. The method of claim 21, wherein the at least one exit edge is adapted to produce a jet outflow angle having a minimum jet exit speed radial component. 32. The method of claim 21, wherein the at least one exit edge comprises a shape that is adapted to produce a jet outflow angle having a maximum deflection relative to 180 degrees. 33. The method of claim 21, wherein the at least one exit edge is adapted to produce a flow having an optimal angular profile. 34. The method of claim 21, further comprising: calculating an optimal exit angle profile for the at least one exit edge using at least one of a numerical model, a fluid dynamic model, a mathematical model, and a plurality of model trials. 35. The method of claim 21, further comprising: ensuring that the at least one exit edge comprises an angular flow profile that is adapted to only partially graze a subsequent Pelton bucket when the Pelton bucket and subsequent Pelton bucket are arranged on a Pelton wheel. 36. The method of claim 21, wherein a portion of the at least one exit edge in the region of a bucket base is arranged above the imaginary line extending between the front and the rear edges of the Pelton bucket. 37. The method of claim 21, wherein a portion of the at least one exit edge in a region of a mean circular jet diameter is arranged below the imaginary line extending between the front and the rear edges of the Pelton bucket. 38. The method of claim 21, wherein a portion of the at least one exit edge in the region of a bucket face is arranged above the imaginary line extending between the front and the rear edges of the Pelton bucket. 39. A Pelton bucket adapted to be impinged by a jet, the Pelton bucket comprising: a front edge, a rear edge, and two exit edges; each of the two exit edges comprising: at least one partially concavely curved portion; and at least one straight portion, wherein the two exit edges each comprise a portion that is arranged below an imaginary segmented line including a line segment defined by the at least one straight portion, a line-segment extending between the front edge of the Pelton bucket and a first end of the at least one straight portion, and a line segment extending between the rear edge of the Pelton bucket and a second end of the at least one line segment. 40. The Pelton bucket of claim 39, wherein a portion of each of the exit edges proximate to a bucket base extends above the imaginary segmented line extending between the front and rear edges of the Pelton bucket. 41. The Pelton bucket of claim 39, wherein a portion of each of the two exit edges proximate to a bucket face is arranged above the imaginary segmented line extending between the front and rear edges of the Pelton bucket. 42. The Pelton bucket of claim 39, wherein a contour of each of the two exit edges has an outflow angle which minimizes a radial component of an exit speed. 43. A Pelton wheel comprising: a plurality of buckets; each of the plurality of buckets being adapted to be impinged by a jet and comprising a front edge and two exit edges; at least one of the two exit edges comprising: at least one partially concavely curved portion; and at least one straight portion, wherein the at least one of the two exit edges comprise a portion that is arranged below an imaginary segmented line including a line segmented defined by the at least one straight portion, a line segment extending between the front edge of the Pelton bucket and a first end of the at least one straight portion, and the at least one of the two rear edges of the Pelton bucket and a second end of the at least one straight portion. 44. The Pelton wheel of claim 43, wherein the straight portion is between a convex portion and the concavely curved portion. 45. The Pelton wheel of claim 43, wherein a portion of the at least one of the two exit edges near the region of a bucket face is arranged above the imaginary segmented line extending between the front and the rear edges of the Pelton bucket. 46. The Pelton wheel of claim 43, wherein a contour of each of the two exit edges has an outflow angle which minimizes a radial component of an exit speed.
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