GAS TURBIN AIRFOIL CAPABLE OF COOLING

摘要

PURPOSE: An air foil is provided to have an improved cooling performance along with a rear circumference and improved tolerance against mechanic fatigue. CONSTITUTION: An air foil(10) capable of cooling is prepared with an inside cavity(18), an outside wall(12), plural first and second cooling holes(20,22). The outside wall includes a part(16) on an absorption side and a part(14) on a pressure side. The outside wall is extended in a widthwise direction between a front and a rear circumference and is extended in a lengthwise direction between the surfaces of inside and outside radius direction. A central camber line(42) of the air foil is extended between the front and rear circumference and the outside surfaces of the pressure side wall and the absorption side wall along with a route passing the same distance. The first cooling hole is extended within the wall on the absorption side and is escaped from the outside wall through the wall of the pressure side. The second cooling hole is extended through the wall of the pressure side, is close to the first cooling hole and is escaped from the wall of the pressure side on an upper part.