Blade tip cooling

摘要

A turbine blade includes a hollow airfoil having a squealer tip rib (36) extending outboard from a tip cap (40) enclosing the airfoil. An impingement baffle (44) is spaced inboard from the tip cap to define a tip plenum (46) therebetween. Impingement holes (48) extend through the baffle and are directed at the junction (42) of the rib and cap for impinging a coolant jet thereagainst.