Endwall shape for use in turbomachinery
First Claim
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1. A flow directing assembly for use in a rotary machine comprising:
- a plurality of blades, each said blade having an airfoil and a platform;
a plurality of flow passages defined by said airfoils of said blades;
each of said flow passages having an inner endwall defined by platforms of adjacent ones of said blades;
said inner endwall of each said flow passage having means for minimizing shock effects within and aft of each of said flow passages;
said shock effect minimizing means comprising a non-axisymmetric trough which extends from a point within said flow passage to a point aft of said flow passage; and
said trough having an initial amplitude at a location adjacent a leading edge portion of said flow passage, a maximum amplitude adjacent a flow passage throat axial location, and a final amplitude at a downstream extent of said platform and wherein said initial and final amplitudes are less than said maximum amplitude.
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Abstract
The present invention relates to an endwall shape for reducing shock strength on transonic turbomachinery airfoils which define at least one flow passage. The endwall shape includes a non-axisymmetric trough which extends from a leading portion of the at least one flow passage to a point near a trailing edge portion of the at least one flow passage.
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Citations
7 Claims
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1. A flow directing assembly for use in a rotary machine comprising:
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a plurality of blades, each said blade having an airfoil and a platform;
a plurality of flow passages defined by said airfoils of said blades;
each of said flow passages having an inner endwall defined by platforms of adjacent ones of said blades;
said inner endwall of each said flow passage having means for minimizing shock effects within and aft of each of said flow passages;
said shock effect minimizing means comprising a non-axisymmetric trough which extends from a point within said flow passage to a point aft of said flow passage; and
said trough having an initial amplitude at a location adjacent a leading edge portion of said flow passage, a maximum amplitude adjacent a flow passage throat axial location, and a final amplitude at a downstream extent of said platform and wherein said initial and final amplitudes are less than said maximum amplitude. - View Dependent Claims (2, 3, 4, 5)
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- 6. An endwall shape for reducing shock strength on transonic turbomachinery airfoils having at least one flow passage defined by at least two airfoils comprising a non-axisymmetric trough extending from a leading edge portion of said at least one flow passage to a point near a trailing edge portion of said at least one flow passage and said non-axisymmetric trough has having a maximum amplitude near a passage throat axial location.
Specification