A Low Order Flow Network Model for Double-Wall Effusion Cooling Systems

The high pressure turbine nozzle guide vane of a modern aeroengine experiences large heat loads and thus requires both highly effective internal external cooling. This can be accomplished with double-wall effusion cooling, which combines impingement, pin-fin combination three cooling mechanisms causes losses, increasing potential for the migration coolant towards low regions, subsequently starving holes on leading edge supply. paper presents order flow network model to rapidly assess mass distributions through such schemes flexible set geometric conditions. is validated by series experiments varying mainstream gradients. Results from are used indicate design parameters reduce effect migration, minimise risk destructive hot gas ingestion.