TURBINE BLADE

PROBLEM TO BE SOLVED: To provide a turbine blade having an airfoil extending between a root and a tip, where cooling of a tip turn is necessary for body cooling.SOLUTION: A turbine blade comprises: an airfoil (78) having a pressure sidewall and a suction sidewall joined together to define a leading...

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Bibliographische Detailangaben
Hauptverfasser: CHRISTOPHER LLOYD MCKENZIE, BHANU MAHASAMUDRAM REDDY, MANNING ROBERT FRANCIS
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a turbine blade having an airfoil extending between a root and a tip, where cooling of a tip turn is necessary for body cooling.SOLUTION: A turbine blade comprises: an airfoil (78) having a pressure sidewall and a suction sidewall joined together to define a leading edge (92) and a trailing edge (94); a body cooling passage (98) located within the airfoil (78), the body cooling passage (98) having at least one tip turn (100) located proximately to a tip (80); and a tip cooling channel (120) extending along the tip (80), the tip cooling channel (120) enveloping the at least one tip turn (100) to form a cooling barrier between the at least one tip turn (100) and an exterior surface of the airfoil (78) on all surfaces of the at least one tip turn (100).SELECTED DRAWING: Figure 3 【課題】タービンブレードは、根元と先端との間に延在する翼形部である。本体冷却のために先端転回部の冷却が必要である。【解決手段】前縁(92)および後縁(94)を形作るように互いに接合された正圧側壁および負圧側壁を有する翼形部(78)と、前記翼形部(78)内に配置された本体冷却通路(98)であって、前記先端(80)の近傍に配置された少なくとも1つの先端転回部(100)を有する本体冷却通路(98)と、前記先端(80)に沿って延在する先端冷却流路(120)であって、前記少なくとも1つの先端転回部(100)のすべての表面において前記少なくとも1つの先端転回部(100)と前記翼形部(78)の外面との間に冷却障壁を形成するように前記少なくとも1つの先端転回部(100)を覆う先端冷却流路(120)とを備える。【選択図】図3