Patent ID: 6478540
Filing Date: 2002-11-12
Classification: F01D,F05D

Abstract:
A turbine bucket comprising:an airfoil extending from a platform, having high and low pressure sides; a wheel mounting portion; a hollow shank portion located radially between the platform and the wheel mounting portion, said platform having an under surface; and an impingement cooling plate located in said hollow shank portion, said impingement plate located along a high pressure side of the airfoil, spaced from said under surface, said impingement plate formed with plural discrete arrays of impingement cooling holes, said impingement plate also including a blank area without impingement holes located proximate to a trailing edge of said airfoil and substantially surrounded by said discrete arrays of impingement cooling holes, wherein said platform is formed with an array of film cooling holes adapted to discharge air from said hollow shank portion, said array of film cooling holes substantially aligned with said blank area of said impingement plate.