Turbine blade with platform cooling

摘要

A turbine rotor blade with a platform cooling circuit that includes three zones with one zone occupying the entire pressure side of the platform and two zones occupying the entire suction side of the platform. Each zone is formed with a series of impingement ribs that form separated impingement chambers with impingement holes formed in the ribs to form a series of impingement holes with impingement chambers along the entire platform. Each zone is supplied with cooling air from one or more cooling air supply holes located in the forward most impingement chamber. The three zones discharge cooling air out through exit holes located along the two mate-faces and the aft side of the platform so that the cooling air discharged does not overlap.