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Direct Numerical Simulations of turbulent flame expansion in fine sprays

Lookup NU author(s): Professor Nilanjan ChakrabortyORCiD


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Direct Numerical Simulations of expanding flame kernels following localized ignition in decaying turbulence with the fuel in the form of a fine mist have been performed to identify the effects of the spray parameters on the possibility of self-sustained combustion. Simulations show that the flame kernel may quench due to fuel starvation in the gaseous phase if the droplets are large or if their number is insufficient to result in significant heat release to allow for self-sustained flame propagation for the given turbulent environment. The reaction proceeds in a large range of equivalence ratios due to the random location of the droplets relative to the igniter location that causes a wide range of mixture fractions to develop through pre-evaporation in the unreacted gas and through evaporation in the preheat zone of the propagating flame. The resulting flame exhibits both premixed and non-premixed characteristics.

Publication metadata

Author(s): Wandel A, Chakraborty N, Mastorakos E

Publication type: Article

Publication status: Published

Journal: Proceedings of the Combustion Institute

Year: 2009

Volume: 32

Issue: 2

Pages: 2283-2290

ISSN (print): 1540-7489

ISSN (electronic): 1873-2704

Publisher: Elsevier Inc


DOI: 10.1016/j.proci.2008.06.102


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