US 11,674,686 B2
Coating occlusion resistant effusion cooling holes for gas turbine engine
Nagaraja Rudrapatna, Phoenix, AZ (US); and Rodolphe Dudebout, Phoenix, AZ (US)
Assigned to HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed by HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed on May 11, 2021, as Appl. No. 17/317,589.
Prior Publication US 2022/0364727 A1, Nov. 17, 2022
Int. Cl. F23R 3/00 (2006.01); F02C 7/18 (2006.01)
CPC F23R 3/002 (2013.01) [F02C 7/18 (2013.01); F23R 2900/03041 (2013.01); F23R 2900/03042 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A coating occlusion resistant effusion cooling hole configured to form a film of a cooling fluid on a surface of a wall, the coating occlusion resistant effusion cooling hole extending along a longitudinal axis, and the coating occlusion resistant effusion cooling hole comprising:
an inlet section defined so as to be spaced apart from the surface, the inlet section configured to receive the cooling fluid;
a metering section fluidly coupled downstream of the inlet section; and
an outlet section fluidly coupled downstream of the metering section, the outlet section configured to form the film of the cooling fluid on the surface, the outlet section including an overhang portion that extends along the surface, a recessed portion, a first sidewall and a second sidewall, the recessed portion includes a rear wall and a trough wall, the first sidewall and the second sidewall interconnect the overhang portion with the recessed portion along a portion of the outlet section, the first sidewall and the second sidewall converge and diverge in a plane defined proximate an intersection of the rear wall and the trough wall, the plane is transverse to the longitudinal axis, and each of the first sidewall and the second sidewall includes a divergent section that diverges away from the trough wall at a first angle of greater than 90 degrees, a convergent section that converges from the divergent section to the overhang portion in the plane and the convergent section includes a concave curve that curves toward the overhang portion.