Honeycomb seal for abradable angel wing

摘要

An abradable honeycomb is integrally formed in a turbine nozzle (11) sealing flange (16) for engagement with a bucket angel wing (14) to reduce the leakage of air into the turbine's hot gas path. The honeycomb is integrally formed in a turbine nozzle sealing flange (16) using a sinker EDM method to directly sink the honeycomb into the sealing flange (16) itself so that the honeycomb is an integral part of the flange (16). For repair, an entirely new honeycomb flange can be made and welded or brazed on to the turbine nozzle (11).