초록

A stator airfoil is subject to wake fluid from rotor blades in a gas turbine engine. The airfoil includes a plurality of cross channels extending therethrough between opposite sides thereof for bleeding the wake fluid therebetween to reduce differential pressure thereacross and reduce noise.

대표청구항 ▼

[ Accordingly, what is desired to be secured by Letters Patent of the United States is the invention as defined and differentiated in the following claims:] [1.] A stator airfoil subject to wake fluid from rotor blades in a gas turbine engine comprising:a leading edge, an opposite trailing edge, an

[ Accordingly, what is desired to be secured by Letters Patent of the United States is the invention as defined and differentiated in the following claims:] [1.] A stator airfoil subject to wake fluid from rotor blades in a gas turbine engine comprising:a leading edge, an opposite trailing edge, an inner root, an opposite outer tip, and opposite first and second sides extending therebetween; anda plurality of cross channels extending through said airfoil from said first side to said second side for bleeding said wake fluid therebetween to reduce differential pressure thereacross. [12.] A method of reducing noise from wake fluid interaction between a row of rotor blades and row of stator airfoils comprising bleeding said wake fluid circumferentially through said airfoils from a first side thereof to an opposite second side to reduce differential pressure therebetween. A method according to claim 12 further comprising bleeding said wake fluid solely adjacent a leading edge of said airfoils. A method according to claim 12 further comprising bleeding said wake fluid to reduce unsteady-state differential pressure in said wake fluid between said first and second sides to a greater extent than steady state differential pressure therein. A method according to claim 12 further comprising bleeding said wake fluid through a fan strut disposed downstream of a fan blade in a gas turbine engine to reduce fan noise. A method according to claim 12 further comprising bleeding said wake fluid through a fan outlet guide vane disposed downstream of a fan blade in a gas turbine engine to reduce fan noise. A method according to claim 12 further comprising bleeding said wake fluid through a turbine rear frame strut disposed downstream of a turbine blade in a gas turbine engine to reduce turbine exhaust noise. A stator airfoil including cross channels extending between opposite sides thereof for bleeding external fluid across said opposite sides to reduce differential pressure. A stator airfoil comprising:opposite first and second sides extending between opposite leading and trailing edges; anda plurality of cross channels extending between said opposite sides for bleeding external fluid from said first side to said second side to reduce differential pressure thereacross.