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Computational Study of a Customised Shallow-Sump Aero-Engine Bearing Chamber With Inserts to Improve Oil Residence Volume (2017)
Conference Proceeding
Adeniyi, A. A., Chandra, B., & Simmons, K. (2017). Computational Study of a Customised Shallow-Sump Aero-Engine Bearing Chamber With Inserts to Improve Oil Residence Volume. In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. https://doi.org/10.1115/GT2017-64410

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
Zacharzewski, P., Simmons, K., Jefferson-Loveday, R., & Capone, L. (2016). Evaluation of the SST-SAS model for prediction of separated flow inside turbine internal cooling passages. In Conference Proceedings of the ASME 2016 Turbo Expo: Power for Land, Sea, and Air. https://doi.org/10.1115/GT2016-56117

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.

A computational fluid dynamics simulation of oil-air flow between the cage and inner race of an aero-engine bearing (2016)
Journal Article
Adeniyi, A. A., Morvan, H., & Simmons, K. (2017). A computational fluid dynamics simulation of oil-air flow between the cage and inner race of an aero-engine bearing. Journal of Engineering for Gas Turbines and Power, 139(1), https://doi.org/10.1115/1.4034210

In aero-engines, the shafts are supported on bearings that carry the radial and axial loads. A ball bearing is made up of an inner race, an outer race, and a cage, which contains the balls, these together comprise the bearing elements. The bearings r... Read More about A computational fluid dynamics simulation of oil-air flow between the cage and inner race of an aero-engine bearing.

Innovative shallow sump customizations for aero-engine bearing chambers (2016)
Conference Proceeding
Chandra, B., & Simmons, K. (2016). Innovative shallow sump customizations for aero-engine bearing chambers.

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.

Evaluation of a volume of fluid CFD methodology for the oil film thickness estimation in an aero-engine bearing chamber (2016)
Conference Proceeding
Bristot, A., Morvan, H., & Simmons, K. (2016). Evaluation of a volume of fluid CFD methodology for the oil film thickness estimation in an aero-engine bearing chamber.

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.

A study of droplet impact on static films using the BB-LIF technique (2016)
Journal Article
Hann, D. B., Cherdantsev, A. V., Mitchell, A., McCarthy, I., Hewakandamby, B. N., & Simmons, K. (2016). A study of droplet impact on static films using the BB-LIF technique. Experiments in Fluids, 57(46), https://doi.org/10.1007/s00348-016-2132-x

This paper presents results of single droplet impacts on films of different height taken using the Brightness Based Laser Induced Fluorescence technique (BB-LIF). The dynamics of drop impingement such as the shape of the cavity, residual film thickne... Read More about A study of droplet impact on static films using the BB-LIF technique.

Experimental investigation into droplet impingement upon moving films using high speed video and thermal imaging (2015)
Conference Proceeding
Mitchell, A. J., Simmons, K., & Hann, D. B. (2015). Experimental investigation into droplet impingement upon moving films using high speed video and thermal imaging. In Volume 1: Advances in Aerospace Technology. https://doi.org/10.1115/IMECE2015-51677

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
Simmons, K., & Johnson, G. (2015). Velocity measurements in the vicinity of the exit and inlet of a spiral bevel gear shroud. In Volume 5C: Heat Transfer. https://doi.org/10.1115/GT2015-43549

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.

Computational investigation of flows and pressure fields associated with spur gear meshing (2014)
Conference Proceeding
Baydu, C. A., Simmons, K., & Morvan, H. (2014). Computational investigation of flows and pressure fields associated with spur gear meshing. In Volume 5C: Heat Transfer. https://doi.org/10.1115/GT2014-26145

The efficiency of power transmission systems is increasingly targeted with a view to reducing parasitic losses and improving specific fuel consumption (SFC). One of the effects associated with such parasitic losses is the successive compression and e... Read More about Computational investigation of flows and pressure fields associated with spur gear meshing.