Abstract:
In vane cascades, large filleted vanes influence aerodynamics, while
upstream endwall film-cooling arrangement impacts aero-thermal performance. This study explores experimental investigations on endwall flows
and film-cooling effectiveness in a filleted vane cascade using discrete slots
and holes. Two fillet profiles are examined covering the leading-edge area to
either the throat or 62% of the axial chord. Film-cooling employs two slots
and two rows of holes in the leading-edge region with inlet blowing ratios
ranging from 1.0 to 2.8. Results show variations in total pressure loss and
Nusselt number between filleted and un-filleted vanes, highlighting optimal
film-cooling effectiveness with the smaller fillet profiles.
