Abstract: Electric propulsors powered by Proton Exchange Membrane Fuel Cells (PEMFCs) offer a net zero solution to aircraft propulsion. Heat generated by the PEMFCs can be transferred to atmospheric air via a liquid cooling system; ...

Abstract: Rim seals are critical in terms of limiting the temperature of highly stressed engine components but function with a penalty to the power output and contribute to entropy gain stemming from mixing losses in the turbine. ...

Abstract: Unsteady Reynolds-averaged Navier–Stokes modeling (URANS) is a valuable and cost-effective tool for computational fluid dynamics (CFD), including the investigation of mainstream–cavity interaction in turbines. Despite the ...

Abstract: The mainstream, or primary, flow in a gas turbine annulus is characteristically two-dimensional over the midspan region of the blading, where the radial flow is almost negligible. Contrastingly, the flow in the endwall and ...

Abstract: Purge flows are prevalent in modern gas turbine design, allowing for increased turbine entry temperatures. The purge flow passes through a rim seal and interacts with the mainstream flow, modifying the blade secondary flow ...

Abstract: Abstract. Gas turbine secondary air systems enable elevated turbine entry temperatures for increased cycle efficiency and work output. To prevent the ingress of hot mainstream gas into the turbine cavity, purge flow is ...

Abstract: Abstract. The efficiency of aero-engines is linked to increased turbine entry temperature and a secondary air system that protects vulnerable components under high thermal stresses and metal temperatures. Purge (or sealing) ...

Abstract: This paper describes a new research facility which experimentally models hot gas ingestion into the wheelspace of an axial turbine stage. Measurements of the CO2 gas concentration in the rimseal region and inside the cavity ...

Abstract: This paper describes experimental results from a research facility which experimentally models hotgas ingress into the wheelspace of an axial turbine stage with an axialclearance rim seal. Thermochromic liquid crystal (TLC) ...

Abstract: Part I of this twopart paper presented experimental results for externallyinduced (EI) ingress, where the ingestion of hot gas through the rim seal into the wheelspace of a gas turbine is controlled by the circumferential ...