US 11,739,698 B2
Aero-acoustically dampened bleed valve
Thomas Malkus, Albany, NY (US); Trevor H. Wood, Clifton Park, NY (US); Giridhar Jothiprasad, Clifton Park, NY (US); Nageswar Ganji, Bengaluru (IN); Hiranya Kumar Nath, Bengaluru (IN); Ravindra Shankar Ganiger, Bengaluru (IN); and Ambika Shivamurthy, Bengaluru (IN)
Assigned to GENERAL ELECTRIC COMPANY, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Mar. 1, 2022, as Appl. No. 17/684,172.
Claims priority of application No. 202211003034 (IN), filed on Jan. 19, 2022.
Prior Publication US 2023/0228220 A1, Jul. 20, 2023
Int. Cl. F02C 9/18 (2006.01); F01D 17/10 (2006.01); F04D 27/02 (2006.01); F02C 7/052 (2006.01)
CPC F02C 9/18 (2013.01) [F01D 17/105 (2013.01); F02C 7/052 (2013.01); F04D 27/023 (2013.01); F04D 27/0215 (2013.01); F05D 2250/42 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A variable bleed valve (VBV) apparatus comprising:
a variable bleed valve port defining a bleed flowpath in a turbine engine, the variable bleed valve port having an inlet and an outlet, the inlet being radially inward relative to the outlet and defined by an upstream edge and a downstream edge, wherein the upstream edge is coupled to a casing defining a main flowpath of the turbine engine such that the upstream edge defines a point of flow separation for a boundary layer that flows along the casing;
a variable bleed valve door to actuate the variable bleed valve apparatus, the variable bleed valve door to prevent flow through the outlet when the variable bleed valve port is in a closed position;
wherein the upstream edge includes a vortex device having a vorticity generating feature disposed along a length of the upstream edge such that the vorticity generating feature is positioned immediately at the point of flow separation, and wherein the vorticity generating feature includes at least one of a first undulated bump or a first serration.