School of Mechanical, Electrical and Manufacturing Engineering


B.Eng (Hons) Mechanical Engineering

M.Sc Mechanical Engineering

I completed a placement year at Babcock Marine and Technology where I worked in component design and analysis.

My PhD is in the elastohydrodynamic lubrication in piston-ring pack assemblies. Two of the most important considerations in engine design are fuel efficiency and emissions. The piston ring pack accounts for a disproportionate amount of the total engine losses (up to 25% of parasitic), especially when considering the size of the component. The project aims to investigate both the frictional losses and the dynamic effects of the piston ring pack. The multitude of vehicles utilising the internal combustion engine globally provides the foundation of the engineering motivation behind the current study, with the penultimate objective being an increase in efficiency coupled with a reduction in emissions.


Turnbull R, Mohammad Pour M, rahmani R, rahnejat H, Offner G. (2017). Coupled Elastodynamics of Piston Compression Ring Subject to Sweep Excitation, Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, 2017, 231(3) 469-479 doi: 10.1177/1464419317725942

Turnbull R, Bewsher SR, Mohammad pour M, Rahmani R, Rahnejat H, Offner G (2016). Elastodynamics of Piston Compression Rings, 3rd Biennial International Conference on Powertrain Modelling and Control (PMC 2016)