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Turbulent Combustion Modelling and Experiments: Recent Trends and Developments

DOI: 10.1615/THMT-18.10
pages 1-18

A. Giusti
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK

E. Mastorakos
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK

Abstract

The development of better laser-based experimental methods and the fast rise in computer power has created an unprecedented shift in turbulent combustion research. The range of species and quantities measured and the advent of kHz-level planar diagnostics are now providing great insights in important phenomena and applications such as local and global extinction, pollutants, and spray combustion that were hitherto unavailable. In simulations, the shift to LES allows better representation of the turbulent flow in complex geometries, but despite the fact that the grid size is smaller than in RANS, the push towards realistic conditions and the need to include more chemistry that includes very fast species and thin reaction zones emphasize the necessity of a sub-grid turbulent combustion model. The paper discusses examples from current research with experiments and modelling that focuses on flame transients (self-excited oscillations, local extinction), sprays, soot emissions, and on practical applications, which demonstrate how current models are being validated by experimental data and the concerted efforts the community is taking to promote the modelling tools to industry. In particular, the various coordinated International Workshops on non-premixed, premixed, and spray flames and on soot are discussed extensively and some of their target flames are explored.

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