All Outputs (11)

How Do Interfacial Shear and Gravity Affect the Oil Film Characteristics Near an Aero-Engine Bearing? (2022)
Journal Article
Sinha, A., Brewster, B., Johnson, K., Walsh, M., & Hann, D. (2022). How Do Interfacial Shear and Gravity Affect the Oil Film Characteristics Near an Aero-Engine Bearing?. Journal of Engineering for Gas Turbines and Power, 144(10), Article 101001. https://doi.org/10.1115/1.4055211

Recent demand for reducing carbon emission and for increasing engine efficiency has led aero-engine manufacturers to strive for a better oil flow system. Aero-engine bearing chambers that house the shaft-support bearings are among the most challengin... Read More about How Do Interfacial Shear and Gravity Affect the Oil Film Characteristics Near an Aero-Engine Bearing?.

How do the liquid properties affect the entrapment of bubbles in gas sheared liquid flows? (2021)
Journal Article
Sinha, A., Cherdantsev, A., Johnson, K., Vasques, J., & Hann, D. (2021). How do the liquid properties affect the entrapment of bubbles in gas sheared liquid flows?. International Journal of Heat and Fluid Flow, 92, Article 108878. https://doi.org/10.1016/j.ijheatfluidflow.2021.108878

A large number of industries use fossil fuels for the purpose of cooling and lubrication utilizing a gas stream that acts as a shearing force on the liquid surface. Decreasing the carbon footprint of these processes needs an improved understanding of... Read More about How do the liquid properties affect the entrapment of bubbles in gas sheared liquid flows?.

Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part II: Droplet Behavior in the Chamber (2021)
Journal Article
Nicoli, A., Johnson, K., & Jefferson-Loveday, R. (2021). Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part II: Droplet Behavior in the Chamber. Journal of Engineering for Gas Turbines and Power, 143(10), 1-13. https://doi.org/10.1115/1.4051561

Within aeroengines, bearing chambers exhibit a highly complex two-phase environment as a result of the complex air/oil interactions. The desire to operate at both higher temperatures and shaft speeds requires a sufficient understanding of these syste... Read More about Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part II: Droplet Behavior in the Chamber.

Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part I: Film Behavior Near the Bearing (2021)
Journal Article
Nicoli, A., Johnson, K., & Jefferson-Loveday, R. (2021). Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part I: Film Behavior Near the Bearing. Journal of Engineering for Gas Turbines and Power, 143(10), 1-12. https://doi.org/10.1115/1.4051560

Previous work at the Gas Turbine and Transmissions Research Center (G2TRC) has highlighted the need for an adequate computational model, which can appropriately model the oil shedding behavior from bearings. Oil can break up forming droplets and liga... Read More about Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part I: Film Behavior Near the Bearing.

Operating under jet splashing conditions can increase the capture efficiency of scoops (2019)
Journal Article
Kruisbrink, A., Paleo Cageao, P., Morvan, H., & Simmons, K. (2019). Operating under jet splashing conditions can increase the capture efficiency of scoops. International Journal of Heat and Fluid Flow, 76, 296-308. https://doi.org/10.1016/j.ijheatfluidflow.2018.11.010

Scoops are used in aero-engines to capture oil and direct the oil flow for the lubrication of bearings, where a direct oil injection is not effective or possible. The design of scoops focuses on the capture of oil to aim for the highest capture effic... Read More about Operating under jet splashing conditions can increase the capture efficiency of scoops.

Assessment of the Oil Scoop Capture Efficiency in High Speed Rotors (2018)
Journal Article
Paleo Cageao, P., Simmons, K., Prabhakar, A., & Chandra, B. (2019). Assessment of the Oil Scoop Capture Efficiency in High Speed Rotors. Journal of Engineering for Gas Turbines and Power, 141(1), Article 012401. https://doi.org/10.1115/1.4040812

Experimental research was conducted into a scooped rotor system that captures oil from a stationary jet and directs it through passages within the shaft to another axial location. Such a system has benefits for delivering oil via under-race feed to a... Read More about Assessment of the Oil Scoop Capture Efficiency in High Speed Rotors.

Experimental investigation into gas turbine oil scoop capture efficiency (2018)
Journal Article
Paleo Cageao, P., Simmons, K., Prabhakar, A., & Chandra, B. (2019). Experimental investigation into gas turbine oil scoop capture efficiency. Journal of Engineering for Gas Turbines and Power, 141(1), Article 012401. https://doi.org/10.1115/1.4040812

Experimental research was conducted into a scooped rotor system that captures oil from a stationary jet and directs it through passages within the shaft to another axial location. Such a system has benefits for delivering oil via under-race feed to a... Read More about Experimental investigation into gas turbine oil scoop capture efficiency.

Mechanisms for Residence Volume Reduction in Shallow Sump (2017)
Journal Article
Chandra, B., Simmons, K., & Murphy, A. (2018). Mechanisms for Residence Volume Reduction in Shallow Sump. Journal of Engineering for Gas Turbines and Power, 140(3), Article 032601. https://doi.org/10.1115/1.4037871

© 2018 by ASME. Gas turbine aero-engines employ fast rotating shafts that are supported by bearings at several axial locations along the engine. Due to extreme load and heat, oil is injected to the bearings to aid lubrication and cooling. The oil is... Read More about Mechanisms for Residence Volume Reduction in Shallow Sump.

A coupled Euler-Lagrange CFD modelling of droplets-to-film (2017)
Journal Article
Adeniyi, A. A., Morvan, H. P., & Simmons, K. A. (in press). A coupled Euler-Lagrange CFD modelling of droplets-to-film. Aeronautical Journal, 121(1246), https://doi.org/10.1017/aer.2017.107

In this paper, a droplet to film interaction model technique is presented. In the proposed approach, the liquid and gas continua are modelled using an enhanced Volume of Fluid (VoF) technique while the droplets are tracked using a Lagrangian framewor... Read More about A coupled Euler-Lagrange CFD modelling of droplets-to-film.

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.

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.