US 11,939,889 B2
Method for manufacturing an engine component with a cooling duct arrangement and engine component
Kay Heinze, Ludwigsfelde (DE); and Michael Ebel, Rangsdorf (DE)
Assigned to ROLLS-ROYCE DEUTSCHLAND LTD & CO KG, Blankenfelde-Mahlow (DE)
Appl. No. 17/435,953
Filed by Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow (DE)
PCT Filed Mar. 3, 2020, PCT No. PCT/EP2020/055587
§ 371(c)(1), (2) Date Sep. 2, 2021,
PCT Pub. No. WO2020/178295, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10 2019 105 442.7 (DE), filed on Mar. 4, 2019.
Prior Publication US 2022/0162955 A1, May 26, 2022
Int. Cl. F01D 9/06 (2006.01); F01D 5/18 (2006.01); F01D 9/02 (2006.01); F23R 3/06 (2006.01)
CPC F01D 9/065 (2013.01) [F01D 5/186 (2013.01); F01D 9/023 (2013.01); F23R 3/06 (2013.01); F05D 2240/11 (2013.01); F05D 2240/15 (2013.01); F05D 2240/35 (2013.01); F05D 2240/81 (2013.01); F05D 2250/11 (2013.01); F05D 2260/202 (2013.01); F23R 2900/03041 (2013.01); F23R 2900/03042 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for producing an engine component having a cooling duct arrangement, the method comprising:
providing a plurality of cooling ducts and a plurality of inflow openings, with each of the plurality of cooling ducts having one of the plurality of inflow openings, wherein the plurality of inflow openings are arranged according to a pattern on an inflow surface of the engine component, each of the plurality of cooling ducts flowing into a respective recess in a wall of the engine component, the plurality of cooling ducts configured to guide a cooling fluid onto the wall to form a cooling film along the wall, wherein the method further comprises determining the pattern for the plurality of inflow openings comprises the following steps:
specifying a minimum spacing between two adjacent ones of the plurality of inflow openings,
determining a quantity of the plurality of cooling ducts and a mean diameter for each of the plurality of inflow openings based on a specified mass flow for the cooling fluid through the plurality of cooling ducts and on a length of extent of the inflow surface along a first direction of extent of the inflow surface,
defining an isosceles triangle having three vertices with one of the plurality of inflow openings positioned centrally at each of the three vertices, wherein a length of a base of the isosceles triangle corresponds to a specified minimum spacing, the base extending along the first direction of extent,
determining a maximum width of each recess, each recess being assigned to one of the plurality of cooling ducts, on a basis of the mean diameter, and
building up the pattern in a first region of the inflow surface using a plurality of the isosceles triangles, wherein a row of the plurality of isosceles triangles situated one behind the other along the first direction of extent defines a number of vertices, wherein two adjacent ones of the plurality of isosceles triangles each have at least one of the vertices in common and at the vertices having a respective one of the plurality of inflow openings with the mean diameter, each of the plurality of inflow openings at the vertices leading to one of the plurality of cooling ducts leads into one of the recesses with the maximum width.