Airfoil assembly including vortex reducing at an airfoil leading edge
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United States of America Patent
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Jul 28, 2015
Grant Date -
Jan 23, 2014
app pub date -
Jul 19, 2012
filing date -
Jul 19, 2012
priority date (Note) -
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Abstract
An airfoil assembly including an endwall and an airfoil extending from the into a gas flow path. The endwall includes upstream and downstream edges, and is defined on a platform structure having a front surface extending radially in a direction of a thickness of the platform structure. At least one fluid injection passage extends through the platform structure in a direction from the upstream edge toward the downstream edge of the endwall. The fluid injection passage has an outlet opening defined at the endwall and an inlet opening in fluid communication with a pressurized fluid source. The fluid injection passage extends at a shallow angle relative to a plane of the endwall wherein the fluid injection passage defines a passage axis passing through the front surface and the endwall for effecting energization of a boundary layer between the outlet opening and the airfoil leading edge.
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