Patent ID: 7824156

Claim:
A cooled component of a fluid-flow machine, comprising: an outer wall adapted to be contacted by hot working medium; a cooling passage, having a center region extending along a longidudinal axis of the component, through which a cooling fluid can flow along the longitudinal axis; and a baffle element comprising a plurality of spaced-apart segments arranged to form a spiral pattern along an inner surface of the cooling passage, the baffle element extending along a helical path with a helix angle of 45° or greater, neither the cooling passage or the baffle element having a solid core in the center region of the cooling passage, wherein the baffle element extends from the inner surface toward the center region a radial extent in a manner according to which a partial flow, transversely directed with respect to the longitudinal axis, and of varying magnitude, can be achieved along the helical path of the baffle element.