Heat exchanger
AssigneeKomatsu Ltd.
InventorKoki Hirasawa
Life of this patent
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Abstract
This heat exchanger includes a tube that has an inner surface facing an internal passage through which an exhaust gas discharged from an engine is able to flow and an outer surface facing an external passage through which cooling water for heat exchange with the exhaust gas is able to flow, and extends in a flow direction of the exhaust gas, and a riblet structure that is provided on the inner surface of the tube and has a plurality of convex portions extending in an extension direction of the tube, in which the riblet structure has a bottom wall surface that is aligned with the inner surface of the tube at a bottom between two adjacent convex portions among the plurality of convex portions.
Claims11
A heat exchanger comprising:
- a tube that has an inner surface facing an internal passage through which an exhaust gas discharged from an engine is able to flow and an outer surface facing an external passage through which cooling water for heat exchange with the exhaust gas is able to flow, and extends in a flow direction of the exhaust gas;
- and
- a riblet structure that is provided on the inner surface of the tube and has a plurality of convex portions extending in an extension direction of the tube,
- wherein the riblet structure has a bottom wall surface that is aligned with the inner surface of the tube at a bottom between two adjacent convex portions among the plurality of convex portions.
Dependencies are inferred from the claim text.