AIRFOIL PLATFORM RIM SEAL ASSEMBLY

摘要

An airfoil stage of a turbine engine (20) includes an upstream airfoil assembly (62), a downstream airfoil assembly (64) in rotational relationship to the upstream airfoil assembly (62) and a rim seal assembly (118) integrated therebetween. The rim seal assembly (118) may include a sloped downstream portion (94) of a platform (70) of the upstream airfoil assembly (62), an upstream segment (110) of a platform (76) of the downstream airfoil assembly (64) and a nub (120) that projects radially outward from the upstream segment (110). The downstream portion (94) and the upstream segment (110) are spaced from one-another defining a cooling cavity (114) therebetween for the flow of cooling air. The portion (94) and segment (110) overlap axially such that the nub (120) is axially aligned to the downstream portion (94) to reduce a core airflow (73) into the cooling cavity (114).