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Professor Simone Hochgreb

Professor Simone Hochgreb

Professor of Experimental Combustion


Office Phone: 01223 764098

Departments and Institutes

Engineering:

Research Interests

I investigate problems in energy conversion and reacting flows, with the aim of maximising efficiency and minimising harmful pollutant emissions. The main theme is to understand the physics of reacting flows in energy conversion devices, and the tradeoffs in stability, efficiency and emissions.

Many of the projects involve experimentation and analysis at realistic conditions, from which simpler experiments are defined: measurements in gas turbine injectors at high pressures and temperatures, eg. by means of optical diagnostics and measurement techniques provided the questions for current experiments investigating how reactant stratification behaviour affects flame structure, emissions formation, ignition, behaviour and instability. Results of the work on flame instability and soot emissions have been used by partners in industry in developing new injectors, whilst the work on flame structure and instabilities continues to serve as a database for model verification. The work is inherently collaborative, developing and sharing tools, data and models across the world.

Past research includes work on chemical kinetics, autoignition and internal combustion engine performance and emissions. Current developments are focused on understanding the emergence and fate of hot (entropy) spots in combustion, leading to emissions and instabilities in model combustors, and developing accurate and non-intrusive methods for measurements of soot, coal, spray and fine particles in reacting flows.

Key Publications

Chong, C.T., S. Hochgreb, Spray flame structure of rapeseed biodiesel and Jet-A1 fuel, Fuel. 115 (2014) 551–558.

Mohd Yasin, M.F., R.S. Cant, C.T. Chong, S. Hochgreb, Discrete multicomponent model for biodiesel spray combustion simulation, Fuel. 126 (2014) 44–54 doi:10.1016/j.fuel.2014.02.020.

Chong, C.T., S. Hochgreb, Measurements of laminar flame speeds of liquid fuels: Jet-A1, diesel, palm methyl esters and blends using particle imaging velocimetry (PIV), Proc. Combust. Inst. 33 (2011) 979–986 doi:10.1016/j.proci.2010.05.106.

Chong, C.T., S. Hochgreb, Spray Combustion Characteristics of Palm Biodiesel, Combust. Sci. Technol. 184 (2012) 1093–1107 doi:10.1080/00102202.2012.663999.

Balusamy, S., A. Schmidt, S. Hochgreb, Flow field measurements of pulverized coal combustion using optical diagnostic techniques, Exp. Fluids. 54 (2013) 1534 doi:10.1007/s00348-013-1534-2.

Kim, K.T., S. Hochgreb, Effects of Nonuniform Reactant Stoichiometry on Thermoacoustic Instability in a Lean-Premixed Gas Turbine Combustor, Combust. Sci. Technol. 184 (2012) 608–628 doi:10.1080/00102202.2011.652788.

Sweeney, M.S., S. Hochgreb, M.J. Dunn, R.S. Barlow, Multiply conditioned analyses of stratification in highly swirling methane/air flames, Combust. Flame. 160 (2013) 322–334 doi:10.1016/j.combustflame.2012.10.017.

Sweeney, M.S., S. Hochgreb, M.J. Dunn, R.S. Barlow, The structure of turbulent stratified and premixed methane/air flames II: Swirling flows, Combust. Flame. 159 (2012) 2912–2929 doi:10.1016/j.combustflame.2012.05.014.

Sweeney, M.S., S. Hochgreb, M.J. Dunn, R.S. Barlow, The structure of turbulent stratified and premixed methane/air flames I: Non-swirling flows, Combust. Flame. 159 (2012) 2896–2911 doi:10.1016/j.combustflame.2012.06.001.