Patent ID: 8303253
Filing Date: 2012-11-06
Classification: F01D,F05D

Abstract:
1. A turbine airfoil comprising: a spar having a general airfoil shape with a leading edge and a trailing edge and a pressure side wall and a suction side wall extending between the two edges; the spar forming at least one collector cavity between the two walls; an outer surface of the spar includes a plurality of ribs extending in a spanwise direction along the airfoil; the outer surface of the spar includes a row of mini pin fins each extending between adjacent ribs; a thin thermal skin forming an outer airfoil surface bonded to the spar; the thin thermal skin having a plurality of mini pin fins extending out from the backside surface of the thin thermal skin; and, the mini pin fins on the spar and the thin thermal skin arranged in an alternating arrangement to form a serpentine flow passage between adjacent ribs; wherein the serpentine flow passages discharge into the collector cavity.