All Outputs (21)

GT2022-82180 Experimental investigation into oil film thickness and behaviour near an aero-engine bearing (2022)
Conference Proceeding

In an aero-engine transmission system, bearings are used for shaft location and load support. These bearings are housed in bearing chambers and oil is supplied to the chamber for lubrication and cooling. To achieve the targets of ACARE Flightpath 205... Read More about GT2022-82180 Experimental investigation into oil film thickness and behaviour near an aero-engine bearing.

COUPLED EULERIAN THIN FILM MODEL AND LAGRANGIAN DISCRETE PHASE MODEL TO PREDICT FILM THICKNESS INSIDE AN AERO-ENGINE BEARING CHAMBER (2022)
Conference Proceeding

In aero-engine bearing chambers, two-phase shearing flows are difficult to predict as Computational Fluid Dynamics (CFD) RANS models tend to overestimate interfacial turbulence levels, leading to inaccuracies in the modelling of the flow. Turbulence... Read More about COUPLED EULERIAN THIN FILM MODEL AND LAGRANGIAN DISCRETE PHASE MODEL TO PREDICT FILM THICKNESS INSIDE AN AERO-ENGINE BEARING CHAMBER.

Experimental Investigation Into Oil Shedding From a Rotating Cup Geometry (2022)
Conference Proceeding

Oil shedding from rotating components and static elements within rotating systems has a number of applications within the design and understanding of transmission systems as well as wider industrial applications. There is a reasonable body of prior r... Read More about Experimental Investigation Into Oil Shedding From a Rotating Cup Geometry.

Droplet Impact on a Curved Moving Liquid Film (2022)
Conference Proceeding

The European Commission has set targets to reduce the emissions of CO2 and NOx by 75% and 90% respectively, per passenger kilometre, by 2050. Computational modelling of elements within the aero-engine will play a key role in achieving this goal. Curr... Read More about Droplet Impact on a Curved Moving Liquid Film.

Numerical Investigation Into Maximum Pressure Capability of Intershaft Hydraulic Seals (2022)
Conference Proceeding

Hydraulic seals are used as intershaft seals in aero-engines and consist of an oil filled trough on the higher speed shaft and a fin on the lower speed shaft that dips into the oil forming the seal. Rotation is imparted to the sealing fluid within th... Read More about Numerical Investigation Into Maximum Pressure Capability of Intershaft Hydraulic Seals.

Investigation of Droplet Shedding in an Aeroengine Bearing Chamber Using Convolutional Neural Networks (2022)
Conference Proceeding

More efficient aeroengines are needed to reduce the environmental impact of civil aviation. Design changes for increased efficiency mean that higher loads are transmitted through the bearings supporting the rotating shafts. Better bearing chamber des... Read More about Investigation of Droplet Shedding in an Aeroengine Bearing Chamber Using Convolutional Neural Networks.

Numerical investigations to assess the impact of shaft speed on the performance of scoop devices (2018)
Conference Proceeding

The demand for continuous and efficient lubrication in aeroengine bearing assemblies has encouraged the development of scoop based lubrication systems. Using a scooped rotor in conjunction with axial passages within the shaft, a scoop system can prov... Read More about Numerical investigations to assess the impact of shaft speed on the performance of scoop devices.

Experimental investigation of oil shedding from an aero-engine ball bearing at moderate speeds (2017)
Conference Proceeding

In civil aero-engine transmission system bearings are used for shaft location and load support. An experimental test facility in the University of Nottingham's Gas Turbine Transmissions Research Centre (G2TRC) was designed and commissioned to investi... Read More about Experimental investigation of oil shedding from an aero-engine ball bearing at moderate speeds.

Effect of vortex shedding on the performance of scoop based lubrication devices (2017)
Conference Proceeding

In civil aircraft aeroengine bearing chambers it is sometimes difficult to feed oil to bearings using the traditional under-race or targeted jet approaches. In such situations one proposed solution is that of a scoop delivery system. Published experi... Read More about Effect of vortex shedding on the performance of scoop based lubrication devices.

Oil film thickness measurements on surfaces close to an aeroengine ball bearing using optical techniques (2017)
Conference Proceeding

In a civil aero-engine transmission system a number of bearings are used for shaft location and load support. A bespoke experimental test facility in the University of Nottingham's Gas Turbine and Transmissions Research Centre (G2TRC) was created to... Read More about Oil film thickness measurements on surfaces close to an aeroengine ball bearing using optical techniques.

Effect of Turbulence Damping in VOF Simulation of an Aero-Engine Bearing Chamber (2017)
Conference Proceeding

In aero-engine bearing chambers, the modelling of sheardriven oil films with the Volume of Fluid method poses significant challenges linked with the need to accurately capture the gasliquid interaction at the free surface. Typically, the modelling of... Read More about Effect of Turbulence Damping in VOF Simulation of an Aero-Engine Bearing Chamber.

Experimental Investigation Into Crater Morphology for Droplets Impinging on a Moving Film (2017)
Conference Proceeding

Computational Study of a Customised Shallow-Sump Aero-Engine Bearing Chamber With Inserts to Improve Oil Residence Volume (2017)
Conference Proceeding

An aero-engine bearing chamber is a structure that is used to contain and collect oil used in lubricating and cooling the bearings supporting the high-speed engine shafts. There are various bearings in an aero-engine. Within the bearing chambers, the... Read More about Computational Study of a Customised Shallow-Sump Aero-Engine Bearing Chamber With Inserts to Improve Oil Residence Volume.

Evaluation of the SST-SAS model for prediction of separated flow inside turbine internal cooling passages (2016)
Conference Proceeding

The flow and heat transfer over a three-dimensional axisymmetric hill and rectangular ribbed duct is computed in order to evaluate the Shear Stress Transport-Scale Adaptive Simulation (SST-SAS) turbulence model. The study presented here is relevant t... Read More about Evaluation of the SST-SAS model for prediction of separated flow inside turbine internal cooling passages.

Oil scoop simulation and analysis using CFD and SPH (2016)
Conference Proceeding

Innovative shallow sump customizations for aero-engine bearing chambers (2016)
Conference Proceeding

Aero-engines incorporate various bearing chambers and these typically contain bearings, seals, rotating shafts, stationary walls and struts, and sometimes gears. Oil is supplied for lubrication and cooling and is removed (scavenged) from the sump reg... Read More about Innovative shallow sump customizations for aero-engine bearing chambers.

Oil-Air Flow Between the Cage and Inner Race of an Aeroengine Bearing (2016)
Conference Proceeding

Evaluation of a volume of fluid CFD methodology for the oil film thickness estimation in an aero-engine bearing chamber (2016)
Conference Proceeding

The presented work aims to identify a Volume of Fluid (VOF) CFD approach for the transient simulation of air/oil flows inside an aero-engine bearing chamber. Typically VOF requires relatively fine grids and consequently small time-steps to sufficient... Read More about Evaluation of a volume of fluid CFD methodology for the oil film thickness estimation in an aero-engine bearing chamber.

Experimental investigation into droplet impingement upon moving films using high speed video and thermal imaging (2015)
Conference Proceeding

Aeroengine bearing chambers are geometrically complex, typically containing shafts, bearings, seals and stationary components. Oil is supplied for lubrication and cooling and so the chamber contains a highly rotating two-phase (oil/air) flow where th... Read More about Experimental investigation into droplet impingement upon moving films using high speed video and thermal imaging.

Velocity measurements in the vicinity of the exit and inlet of a spiral bevel gear shroud (2015)
Conference Proceeding

In many aeroengines the accessory power offtake is achieved using a spiral bevel gear set running off one of the main shafts. The crown and bevel gears are housed in an internal gearbox. Over the past few years the Nottingham University Technology Ce... Read More about Velocity measurements in the vicinity of the exit and inlet of a spiral bevel gear shroud.