Tip flowpath contour
The invention relates to a tip flowpath contour. An apparatus (10) is provided and includes a turbine (20) including a casing and a turbine (20) bucket having a tip (32) proximate to the casing and a trailing edge (33) defined relative to a direction of fluid flow through the turbine (20) and a diff...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to a tip flowpath contour. An apparatus (10) is provided and includes a turbine (20) including a casing and a turbine (20) bucket having a tip (32) proximate to the casing and a trailing edge (33) defined relative to a direction of fluid flow through the turbine (20) and a diffuser (40), defined between a central surface (41) and a downstream section (42) of the casing, which is fluidly coupled to the turbine (20) and disposed downstream from the trailing edge (33), a slope of the downstream section of the casing being angled by at least 6 degrees relative to a slope of the tip (32) within about 0.5 turbine (20) bucket chord lengths as measured at the tip (32) from the trailing edge (33), and the central surface (41) and the downstream section (42) of the casing being at least substantially parallel or divergent from the trailing edge (33). |
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