Oil droplet impact dynamics in aero-engine bearing chambers: correlations derived from direct numerical simulations
Peduto, D. (2015) Oil droplet impact dynamics in aero-engine bearing chambers: correlations derived from direct numerical simulations. PhD thesis, Karlsruhe Institute of Technology and University of Nottingham.
Bearing Chambers in Aero-Engines are located near the rolling-element type of bearings which support the shafts and accomodate the resulting thrust loads. One of the main task of the bearing chambers is, beside an efficient scavenging of the lubricating oil, the cooling of the hot compartments. A very complex two-phase air-oil flow takes usually place in these bearing chambers consisting of oil droplet-laden air flows and shear-driven liquid wall films. The interaction of the droplets with the wall films is significantly influencing the wall heat transfer and the cooling performance of these systems. For this reason, a detailed characterization and modelling of the mass and momentum exchange between droplets and wall films for the unique impingement parameter range in bearing chambers is inevitable.
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