Aviation fuels:

Aviation fuels

  • Aviation Fuels degradation

    Aviation Fuels degradation

    Supervisor: Professor Mohamed Pourkashanian and Dr Kevin Hughes

    In jet engines, aviation fuel has a secondary purpose as a coolant in addition to being a fuel. As a result, it is subject to thermal stresses that may cause fuel degradation leading to deposit build up and potentially catastrophic engine failure. This project aims to investigate the mechanisms of deposit formation, to look at the links, if any, between fuel autoxidation, the presence of additives, and contaminants, on deposit formation. This project will use various standard experimental tests of fuel stability, employing techniques such as GCMS to examine liquid composition, SEM and X-ray spectroscopic methods top look at deposit structure and composition.

     

  • Aviation Fuels degradation

    Alternative Aviation Fuels Combustion Experiments

    Supervisor: Professor Mohamed Pourkashanian and Dr Kevin Hughes

    As a consequence of concern over increasing greenhouse gas emissions, along with issues of availability and security of supply of conventional fossil fuels, there is a growing pressure to consider the use of alternative fuels in the aviation sector. However, before this can happen a thorough investigation of both the physical and chemical properties of proposed alternative fuels is required. This project aims to address the uncertainty over the combustion behaviour of alternative fuels by a combination of an experimental and theoretical study. Laminar flames of alternative aviation fuels will be probed by the techniques of laser induced fluorescence along with gas sampling to elucidate the flame structure, which will then be modelled using the one-dimensional flame structure code, PREMIX. This will allow the development and validation of chemical kinetic models of these alternative fuels combustion.

     

  • Aviation Fuels degradation

    Alternative Aviation Fuels Kinetic Mechanism Development

    Supervisor: Professor Mohamed Pourkashanian and Dr Kevin Hughes

    Experimental investigations into alternative fuel performance, in flames and jet-stirred reactors provide a wealth of data to aid the development of chemical kinetic models of the combustion process. In this project, these models will be enhanced based on a survey of current literature developments. Sensitivity analysis tools will allow the identification of the most important reactions within the models themselves, and where there is significant uncertainty in the reaction rate data, the GAUSSIAN 09 software package will be employed to determine thermodynamic and structural properties thus allowing improved estimations of the rate parameters for these important reactions.