Airfoil for improved flow distribution with high radial offset

摘要

A vane assembly for use in a gas flow duct. The vane assembly includes multiple vanes arranged circumferentially about the duct. A throat angle of each of the vanes at mid-span is greater than the throat angle at the tips of the vane.

主权项

1. A vane assembly for a duct comprising:
a plurality of vanes arranged circumferentially about an axis defined by a duct; wherein each of said plurality of vanes has a throat distance defining a shortest distance between the vane and an adjacent vane at a constant span; wherein the throat distance defines a throat angle relative to a line tangential to a trailing edge of each of said plurality of vanes; wherein a throat angle of each vane at mid-span is greater than a throat angle at the tip region of each vane; and wherein a throat angle at 0% -5 % span is greater than a throat angle at mid-span, and the throat angle at mid-span is greater than a throat angle at 95%-100% span, and the throat angle decreases at a first rate as a percent span increases from 0% span to mid-span, the throat angle decreases at a second rate as a percent span increase from mid-span to 100% span, and the second rate is greater than the first rate.