Material having internal cooling passage and method for cooling material having internal cooling passage

A material having an internal cooling passage having a wall surface therein provided with cooling ribs, a cooling medium being allowed to flow in the internal cooling passage so as to conform to the wall surface to perform cooling,

• wherein a front surface of the cooling rib is inclined with respect to a flow direction of the cooling medium so that the cooling medium flows from near the center of the cooling passage to both side edges of the wall surface, and
• wherein a front surface and a back surface of the cooling rib are formed to promote re-attachment of the cooling medium to the wall surface or the cooling rib.

A material having an internal cooling passage formed hollow and cooling ribs provided on opposed wall surfaces of the passage, and being cooled by a medium allowed to flow in the passage,

• wherein a front surface of the cooling rib with respect to a flow direction of the medium is arranged to direct a portion of the medium near the wall surface to a side edge of the passage,
• an upper surface and a back surface of the cooling rib with respect to a flow direction of the medium are shaped to prevent separation from the material by allowing a portion of the medium that has passed near a periphery of the front surface of the cooling rib to move along the upper surface and the back surface, and shaped to reduce a distance to a position to which the medium that has separated re-adheres.

A material having an internal cooling passage having a wall surface provided with ribs thereon and being cooled by allowing a medium to flow in the cooling passage so as to conform to the wall surface,

• wherein the ribs are mounted so that the medium near the center of the cooling passage is allowed to flow on the wall surface to generate a snaking flow thereon and direct a portion of the snaking flow to both side edges of the wall surface and so that a portion of the medium flowing on a surface of the rib is prevented from separating from the rib.

A method of cooling a material having an internal cooling passage in which a cooling medium is allowed to flow to cool a parent material,

• wherein ribs mounted on a wall surface of the inner passage allow a portion of the cooling medium flowing near the center of the internal passage to flow to both side edges of the wall surface and also allow a portion of the cooling medium flowing on a surface of the rib to move to conform to the surface of the rib and then flow to the wall surface.