Uniform chemical milling
AssigneeRaytheon Technologies Corporation
InventorsShane E. Haydt, Brian A. Fisher
Life of this patent
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Abstract
A method includes additively manufacturing a heat exchanger with a plurality of fluid passages extending in a flow direction through the heat exchanger. The method includes chemical milling interior surfaces of the plurality of fluid passages, wherein chemically milling includes flowing chemical milling fluid through an inlet of and inlet header to an outlet of the inlet header and into the plurality of fluid passages from the outlet of the inlet header. The inlet header includes a diffuser structure in fluid communication between the inlet and the outlet, configured to promote even distribution and flow of the chemical milling fluid from the outlet of the inlet header into the plurality of fluid passages.
Claims8
An apparatus comprising:
- an inlet header including an inlet, an outlet, and a diffuser structure in fluid communication between the inlet and the outlet, wherein the diffuser structure is configured to promote even distribution and flow of fluid from the outlet into a plurality of fluid passages of an additively manufactured heat exchanger;
- wherein the diffuser structure includes a pin-fin array defined by a plurality of pin-fins extending across an interior space of the inlet header;
- wherein the pin-fin array includes a plurality of chevron shaped pin-fins, wherein each chevron shaped pin-fin has a upstream, downstream, or lateral pointing apex relative to a flow direction from the inlet of the inlet header to the outlet of the inlet header.
Dependencies are inferred from the claim text.