Patent ID: 6832889
Filing Date: 2004-12-21
Classification: F01D,Y02T

Abstract:
A turbine blade comprising:a hollow airfoil including a concave pressure sidewall and laterally opposite convex suction sidewall joined together at chordally opposite leading and trailing edges extending in span from a root to a tip; a dovetail integrally joined to said airfoil at said root; said airfoil further including a perforate first bridge spaced behind said leading edge and integrally joined to said pressure and suction sidewalls to define a leading edge channel therebetween; said airfoil further including an imperforate second cold bridge spaced behind said first bridge, and extending integrally from said suction sidewall chordally aft to integrally join said pressure sidewall before said trailing edge to define a first serpentine flow channel adjacent said suction sidewall; and said airfoil further including an imperforate third bridge disposed between said first and second bridges, and integrally joined at opposite ends to said pressure sidewall and said second bridge in a convex profile to define with said first bridge a complementary concave supply channel for channeling air through said first bridge, and to define with said second bridge a louver channel extending axially aft therealong to a distal end thereof at said pressure sidewall.