Skip to main content

Research Repository

Advanced Search

Outputs (23)

A machine learning-driven approach to predicting thermo-elasto-hydrodynamic lubrication in journal bearings (2024)
Journal Article
Cartwright, S., Rothwell, B. C., Figueredo, G., Medina, H., Eastwick, C., Layton, J., & Ambrose, S. (2024). A machine learning-driven approach to predicting thermo-elasto-hydrodynamic lubrication in journal bearings. Tribology International, 196, Article 109670. https://doi.org/10.1016/j.triboint.2024.109670

Traditional methods of evaluating the performance of journal bearings, for example thermal-elastic-hydrodynamic- lubrication theory, are limited to simplified conditions that often fail to accurately model real-world components. Numerical models that... Read More about A machine learning-driven approach to predicting thermo-elasto-hydrodynamic lubrication in journal bearings.

Windage Torque Reduction in Low-Pressure Turbine Cavities Part II: Experimental and Numerical Results (2024)
Journal Article
Jackson, R. W., Li, Z., Christodoulou, L., Ambrose, S., Sangan, C. M., Jefferson-Loveday, R., Lock, G. D., & Scobie, J. A. (2024). Windage Torque Reduction in Low-Pressure Turbine Cavities Part II: Experimental and Numerical Results. Journal of Turbomachinery, 146(6), Article 061005. https://doi.org/10.1115/1.4063876

Minimizing the losses within a low-pressure turbine (LPT) system is critical for the design of next-generation ultra-high bypass ratio aero-engines. The stator-well cavity windage torque can be a significant source of loss within the system, influenc... Read More about Windage Torque Reduction in Low-Pressure Turbine Cavities Part II: Experimental and Numerical Results.

Windage Torque Reduction in Low-Pressure Turbine Cavities Part I: Concept Design and Numerical Investigations (2024)
Journal Article
Li, Z., Christodoulou, L., Jefferson-Loveday, R. J., Ambrose, S., Jackson, R., Lock, G. D., Sangan, C. M., & Scobie, J. (2024). Windage Torque Reduction in Low-Pressure Turbine Cavities Part I: Concept Design and Numerical Investigations. Journal of Turbomachinery, 146(6), 1-16. https://doi.org/10.1115/1.4064224

The windage torque on rotational walls has negative effect on the performance of the low pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine stator well, with upstream... Read More about Windage Torque Reduction in Low-Pressure Turbine Cavities Part I: Concept Design and Numerical Investigations.

Influence of swirl and ingress on windage losses in a low-pressure turbine stator-well cavity (2023)
Journal Article
Jackson, R., Christodoulou, L., Li, Z., Sangan, C. M., Ambrose, S., Jefferson-Loveday, R., Lock, G. D., & Scobie, J. A. (2023). Influence of swirl and ingress on windage losses in a low-pressure turbine stator-well cavity. Experiments in Fluids, 64(11), Article 173. https://doi.org/10.1007/s00348-023-03715-7

As part of the drive towards achieving net-zero flight by 2050, the development of ultra-high bypass ratio engines will place greater importance on the efficiency of the low-pressure turbine. Stator-well cavities can be a significant source of loss w... Read More about Influence of swirl and ingress on windage losses in a low-pressure turbine stator-well cavity.

High-fidelity CFD-trained machine learning to inform RANS-modelled interfacial turbulence (2023)
Journal Article
Bertolotti, L., Jefferson-Loveday, R., Ambrose, S., & Korsukova, E. (2023). High-fidelity CFD-trained machine learning to inform RANS-modelled interfacial turbulence. Journal of the Global Power and Propulsion Society, 7, 269-281. https://doi.org/10.33737/jgpps/166558

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 High-fidelity CFD-trained machine learning to inform RANS-modelled interfacial turbulence.

A New Thermal Elasto-Hydrodynamic Lubrication Solver Implementation in OpenFOAM (2023)
Journal Article
Layton, J., Rothwell, B. C., Ambrose, S., Eastwick, C., Medina, H., & Rebelo, N. (2023). A New Thermal Elasto-Hydrodynamic Lubrication Solver Implementation in OpenFOAM. Lubricants, 11(7), Article 308. https://doi.org/10.3390/lubricants11070308

Designing effective thermal management systems within transmission systems requires simulations to consider the contributions from phenomena such as hydrodynamic lubrication regions. Computational fluid dynamics (CFD) remains computationally expensiv... Read More about A New Thermal Elasto-Hydrodynamic Lubrication Solver Implementation in OpenFOAM.

Windage Torque Reduction in Low-Pressure Turbine Cavities Part 2: Experimental and Numerical Results (2023)
Presentation / Conference Contribution
Jackson, R., Lock, G. D., Sangan, C. M., Scobie, J. A., Li, Z., Christodoulou, L., Jefferson-Loveday, R., & Ambrose, S. (2023, June). Windage Torque Reduction in Low-Pressure Turbine Cavities Part 2: Experimental and Numerical Results. Presented at ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, Boston, Massachusetts, USA

Minimizing the losses within a low-pressure turbine (LPT) system is critical for the design of next-generation ultra-high bypass ratio aero-engines. The stator-well cavity windage torque can be a significant source of loss within the system, influenc... Read More about Windage Torque Reduction in Low-Pressure Turbine Cavities Part 2: Experimental and Numerical Results.

Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations (2023)
Presentation / Conference Contribution
Li, Z., Christodoulou, L., Jefferson-Loveday, R., Ambrose, S., Jackson, R., Lock, G. D., Sangan, C. M., & Scobie, J. A. (2023, June). Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations. Presented at ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, Boston, Massachusetts, USA

The windage torque on rotational walls has negative effect on the performance of the low pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine stator well, with upstream... Read More about Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations.

Computational study of free surface film flow and subsequent disintegration of a sheet and ligaments into droplets from a rotary disk atomizer (2023)
Journal Article
Singh, K., Ambrose, S., Jefferson-Loveday, R., Nicoli, A., & Mouvanal, S. (2023). Computational study of free surface film flow and subsequent disintegration of a sheet and ligaments into droplets from a rotary disk atomizer. Engineering Applications of Computational Fluid Mechanics, 17(1), Article 2162971. https://doi.org/10.1080/19942060.2022.2162971

In the present study, a computational methodology based on computational fluid dynamics (CFD) is developed to investigate free surface film flow and its subsequent disintegration on a rotary disk atomizer. The present study provides an insight into e... Read More about Computational study of free surface film flow and subsequent disintegration of a sheet and ligaments into droplets from a rotary disk atomizer.