Patent ID: 8613597
Filing Date: 2013-12-24
Classification: F01D,F05D

Abstract:
1. A turbine rotor blade comprising: a leading edge region and a mid-chord region and a trailing edge region; a multiple pass forward flowing serpentine flow cooling circuit in the mid-chord region with a first leg located adjacent to the trailing edge region; a plurality of ribs extending in a spanwise direction of the blade and from near a platform to near a blade tip of the blade, the ribs forming first and second rows of metering and impingement holes; a row of trailing edge exit slots extending along the trailing edge of the blade and connected to the rows of metering and impingement holes through a third row of metering and impingement holes; the trailing edge exit slots are each formed with a metering section followed by a diffusion section; and, the trailing edge exit slots are each formed by two outer ribs and one inner rib with the inner and outer ribs having slanted surfaces that form two diffusion sections.