A numerical study of the nonlinear development of hydrodynamically unstable premixed flames

Y. Rastigejev, Moshe Matalon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The nonlinear evolution of a perturbed premixed flame under the influence of the hydrodynamic instability, has been primarily studied in the literature within the context of the weakly-nonlinear Michelson-Sivashinsky equation. This equation is valid when the heat release relative to the thermal energy of the fresh mixture is relatively small, or σ - 1 ≪ 1. Although it provides valuable physical insight in the nonlinear development of the Darrieus-Landau instability, its application is limited by the fact that σ ∼ 5 ÷ 8 for real combustible gas mixtures. In this work we examine, within the context of a hydrodynamic model, the evolution of the flame front for finite amplitude disturbances and realistic values of a. This full nonlinear model elucidates the effect of thermal expansion on flame dynamics.

Original languageEnglish (US)
Title of host publication43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers
Pages2557-2570
Number of pages14
StatePublished - 2005
Externally publishedYes
Event43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 10 2005Jan 13 2005

Other

Other43rd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/10/051/13/05

ASJC Scopus subject areas

  • Engineering(all)

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    Rastigejev, Y., & Matalon, M. (2005). A numerical study of the nonlinear development of hydrodynamically unstable premixed flames. In 43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers (pp. 2557-2570)