EINRICHTUNG ZUR VERRINGERUNG DER SPALTVERLUSTE BEI VERSTELLBAREN LEITSCHAUFELN VON STROEMUNGSMASCHINEN, INSBESONDERE GASTURBINENTRIEBWERKEN

摘要

An arrangement for reducing the gap formed by the adjustable axial-flow guide vanes of fluid flow engines, such as gas turbine engines, between the root-sided lower edges of the vane airfoil and the thereto contiguous outer wall of an annular flow passageway. Grooves are formed in the outer wall of the flow passageway above a leading and/or trailing lower edge of the vane airfoil; a soft vane base-covering coating filling said grooves; and recesses formed in the coating-filled grooves slightly above the pivot plane of the respective lower vane edges.