Patent ID: 9085985
Filing Date: 2015-07-21
Classification: F01D,F05D,Y02T

Abstract:
1. A turbine stage comprising: a row of airfoils integrally joined to corresponding platforms and spaced laterally apart to define respective flow passages therebetween for channeling gases, each flow passage having a width; each of the airfoils including a concave pressure side and a laterally opposite convex suction side extending in chord between opposite leading and trailing edges; and at least some of the platforms having a scalloped flow surface including a bulge adjoining the pressure side and a bowl adjoining the suction side aft of the leading edge of the respective airfoils, wherein the bulge is configured having a maximum height located within its respective flow passage, and wherein the bulge decreases in height in a forward and aft direction and decreases in height laterally toward the pressure side of the airfoil and toward the bowl adjoining the suction side of a next adjacent airfoil, and wherein the bowl is configured having a maximum depth located within its respective flow passage and directly adjoining the suction side of the respective airfoil.