Internally cooled airfoil

摘要

An internally cooled airfoil for a gas turbine engine has a hollow airfoil body including pressure and suction sidewalls defining a cooling passage therebetween. A combination of pedestal and trip-strips are used in the cooling passage to enhance heat transfer while minimizing the coolant pressure drop across these features.

主权项

1. An internally cooled airfoil for a gas turbine engine, comprising a hollow airfoil body having opposed pressure and suction sidewalls defining therebetween a cooling passage, and a plurality of pedestals extending across said cooling passage from said pressure sidewall to said suction sidewall, wherein at least some of said pedestals have a trip-strip portion projecting laterally therefrom a distance less than a distance between two adjacent pedestals, wherein each trip-strip portion has a free distal end opposite to an associated one of the pedestals, the free distal end being spaced from adjacent pedestals.