Plug resistant effusion holes for gas turbine engine

An effusion cooling hole for a component associated with a gas turbine engine, the component including a wall having a cold, first surface opposite a hot, second surface and a thickness defined between the first surface and the second surface, the effusion cooling hole extending along a longitudinal axis and angled relative to the second surface, the effusion cooling hole comprising:

• an inlet section spaced apart from the first surface, the inlet section including a planar face orientated transverse to the first surface and defining an inlet through the planar face that is symmetric to the longitudinal axis, the inlet having a first diameter, the planar face having a diameter that is greater than the first diameter, and at least a portion of the planar face is in contact with the first surface at a perimeter of the planar face;
• an outlet at the second surface and downstream from the inlet section, the outlet configured to form a film of a cooling fluid on the second surface, the outlet having an elliptical opening with a third major diameter that is different than the diameter;
• a diverging section downstream from the inlet section and upstream from the outlet, the diverging section is defined substantially external to the thickness, the effusion cooling hole transitions from the first diameter to a second diameter at the diverging section, the second diameter is larger than the first diameter and the diverging section has a first length;
• and
• an intermediate section that extends from the diverging section to the outlet, the intermediate section symmetric to the longitudinal axis, the intermediate section defined at least through the thickness, the intermediate section has the second diameter from the diverging section to the outlet and the intermediate section has a second length that is greater than the first length of the diverging section.

An effusion cooling hole for a component associated with a gas turbine engine, the component including a wall having a cold, first surface opposite a hot, second surface and a thickness defined between the first surface and the second surface, the effusion cooling hole extending along a longitudinal axis and angled relative to the second surface, the effusion cooling hole comprising:

• an inlet section spaced apart from the first surface, the inlet section including a planar face orientated along a first axis transverse to the first surface and the longitudinal axis, the first axis is at a first angle relative to the first surface, the first angle between 10 degrees and 25 degrees, the inlet section defining an inlet through the planar face that is symmetric to the longitudinal axis, the planar face surrounding the inlet and the inlet having a first diameter, the planar face having a diameter that is greater than the first diameter, and at least a portion of the planar face is in contact with the first surface at a perimeter of the planar face;
• an outlet at the second surface and downstream from the inlet section, the outlet configured to form a film of a cooling fluid on the second surface, the outlet having an elliptical opening with a third major diameter that is different than the diameter;
• a diverging section downstream from the inlet section and upstream from the outlet and the diverging section is defined wholly external to the thickness, the effusion cooling hole transitions from the first diameter to a second diameter at the diverging section, the second diameter is larger than the first diameter, smaller than the third diameter and smaller than the diameter, and the diverging section has a first length;
• and
• an intermediate section that fluidly connects the diverging section to the outlet, the intermediate section defined at least through the thickness, the intermediate section having the second diameter from the diverging section to the outlet and the intermediate section has a second length that is greater than the first length of the diverging section.