GAS TURBINE ENGINE COMPONENTS HAVING INTERLACED TRIP STRIP ARRAYS
Components for gas turbine engines are described. The components include a component body defining an internal cavity and an interlaced trip strip array arranged within the internal cavity. The interlaced trip strip array includes a chevron trip strip having an apex, a first ligament extending from the apex in a first direction, and second ligament extending from the apex in a second direction that is different from the first direction to form a chevron shape and a skew trip strip arranged proximate to the chevron trip strip, wherein the skew trip strip has a leading end and a trailing end. The skew trip strip of the array is positioned adjacent to and not contacting the chevron trip strip such that a gap is formed between one of the first ligament and the second ligament and the skew trip strip.
1 . A component for a gas turbine engine, the component comprising:
a component body defining an internal cavity; and
an interlaced trip strip array arranged within the internal cavity, wherein the interlaced trip strip array comprises:
a chevron trip strip having an apex, a first ligament extending from the apex in a first direction, and second ligament extending from the apex in a second direction that is different from the first direction to form a chevron shape; and
a skew trip strip arranged proximate to the chevron trip strip, wherein the skew trip strip has a leading end and a trailing end,
wherein the skew trip strip is positioned adjacent to and not contacting the chevron trip strip such that a gap is formed between one of the first ligament and the second ligament and the skew trip strip.
2 . The component of claim 1 , wherein the interlaced trip strip array comprises a plurality of the chevron trip strips and a plurality of the skew trip strips.
3 . The component of claim 1 , wherein the gap is formed between the leading end of the skew trip strip and one of the first or second ligaments of the chevron trip strip.
4 . The component of claim 1 , wherein the gap is formed between the trailing end of the skew trip strip and one of the first or second ligaments of the chevron trip strip.
5 . The airfoil of claim 1 , wherein the skew trip strip is located on an upstream side of the chevron trip strip in a flow direction through the internal cavity.
6 . The component of claim 1 , wherein the skew trip strip is located on a downstream side of the chevron trip strip in a flow direction through the internal cavity.
7 . The component of claim 1 , further comprising a single-chevron trip strip array and a dual-chevron trip strip array arranged within the internal cavity, wherein the interlaced trip strip array is arranged at a transition between the single-chevron trip strip array and the dual-chevron trip strip array.
8 . The component of claim 1 , wherein the internal cavity is an internal cavity of a blade outer air seal.
9 . The component of claim 1 , wherein the internal cavity is a leading edge cavity along a leading edge of an airfoil.
10 . The component of claim 9 , wherein the leading edge includes a stagnation line, wherein the interlaced trip strip array is arranged with an offset from the stagnation line.
11 . The component of claim 10 , wherein the offset is between 0.003 inches and 0.005 inches.
12 . The component of claim 9 , wherein the interlaced trip strip array is arranged on a pressure side of the leading edge cavity and a second interlaced trip strip array is arranged on a section of the leading edge cavity.
13 . The component of claim 1 , wherein the interlaced trip strip array further comprises a second skew trip strip, wherein the skew trip strip is arranged adjacent the first ligament of the chevron trip strip and the second skew trip strip is arranged adjacent the second ligament of the chevron trip strip.
14 . A gas turbine engine comprising:
a turbine section having a plurality of airfoils and a plurality of blade outer air seals arranged radially outward from the airfoils, wherein at least one blade outer air seal or airfoil comprises:
a component body defining an internal cavity; and
an interlaced trip strip array arranged within the internal cavity, wherein the interlaced trip strip array comprises:
a chevron trip strip having an apex, a first ligament extending from the apex in a first direction, and second ligament extending from the apex in a second direction that is different from the first direction to form a chevron shape; and
a skew trip strip arranged proximate to the chevron trip strip, wherein the skew trip strip has a leading end and a trailing end,
wherein the skew trip strip is positioned adjacent to and not contacting the chevron trip strip such that a gap is formed between one of the first ligament and the second ligament and the skew trip strip.
15 . The gas turbine engine of claim 14 , wherein the interlaced trip strip array comprises a plurality of the chevron trip strips and a plurality of the skew trip strips.
16 . The gas turbine engine of claim 14 , wherein the gap is formed between the leading end of the skew trip strip and one of the first or second ligaments of the chevron trip strip.
17 . The gas turbine engine of claim 14 , wherein the gap is formed between the trailing end of the skew trip strip and one of the first or second ligaments of the chevron trip strip.
18 . The gas turbine engine of claim 14 , wherein the skew trip strip is located on an upstream side of the chevron trip strip in a flow direction through the internal cavity.
19 . The gas turbine engine of claim 14 , wherein the skew trip strip is located on a downstream side of the chevron trip strip in a flow direction through the internal cavity.
20 . The gas turbine engine of claim 14 , further comprising a single-chevron trip strip array and a dual-chevron trip strip array arranged within the internal cavity, wherein the interlaced trip strip array is arranged at a transition between the single-chevron trip strip array and the dual-chevron trip strip array.