TURBINE BUCKET AND TURBINE TO REDUCE THERMAL AND MECHANICAL STRESS IN ROOT COOLING HOLE AND TO IMPROVE INTERACTION BETWEEN MANY STAGES OF TURBINE

PURPOSE: A turbine bucket and a turbine are provided to improve the air dynamic efficiency and to reduce the thermal and the mechanical stress of a first stage airfoil. CONSTITUTION: An airfoil(36) has a nominal profile according to rectangular coordinates values of X, Y and Z. The Z value is a dime...

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Main Authors PESETSKY, DAVID SAMUEL, CHIURATO, ANTHONY AARON, BLACK, RACHEL KYANO, ZHANG, XIUZHANG JAMES
Format Patent
LanguageEnglish
Korean
Published 08.12.2004
Edition7
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES
STEAM ENGINES
WEAPONS
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Summary:PURPOSE: A turbine bucket and a turbine are provided to improve the air dynamic efficiency and to reduce the thermal and the mechanical stress of a first stage airfoil. CONSTITUTION: An airfoil(36) has a nominal profile according to rectangular coordinates values of X, Y and Z. The Z value is a dimensionless value of zero or one and converted to a Z distance of inch unit by multiplying a height of the airfoil to the Z value. The X value and the Y value are distances of inch unit to define an airfoil profile section(38) from each distance Z when connecting with a smooth continuous arc. The profile section from the Z distance forms a complete airfoil shape by combining smoothly. Thereby, the thermal and the mechanical stress in a root cooling hole of a tailing edge is reduced.
Bibliography:Application Number: KR20040037710