| 摘要 |
Tube (16) within airfoil (10) carries cooling air. Flow openings (28) in the tubes direct cooling air (29) against the airfoil inner surface (14) for impingement cooling. Protrusions (30) form extended surface in the form of segmented trip strips are located with at least same in registration with openings (28). The chamber (18) between the tube (16) and surface (14) has an increasing flow area toward air exit (20).
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