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Effects of premixed flames on turbulence and turbulent scalar transport

Andrei Lipatnikov (Institutionen för tillämpad mekanik, Förbränning) ; Jerzy Chomiak (Institutionen för tillämpad mekanik, Förbränning)
Progress in Energy and Combustion Science (0360-1285). Vol. 36 (2010), 1, p. 1-102.
[Artikel, refereegranskad vetenskaplig]

Experimental data and results of direct numerical simulations are reviewed in order to show that premixed combustion can change the basic characteristics of a fluctuating velocity field (the so-called flame-generated turbulence) and the direction of scalar fluxes (the so-called countergradient or pressure-driven transport) in a turbulent flow. Various approaches to modeling these phenomena are discussed and the lack of a well-elaborated and widely validated predictive approach is emphasized. Relevant basic issues (the transition from gradient to countergradient scalar transport, the role played by flame-generated turbulence in the combustion rate, the characterization of turbulence in premixed flames, etc.) are critically considered and certain widely accepted concepts are disputed. Despite the Substantial progress made in understanding the discussed effects over the past decades, these basic issues strongly need further research.

Nyckelord: Premixed turbulent combustion; Flame-generated turbulence; Countergradient transport; Flame instabilities



Denna post skapades 2009-11-25. Senast ändrad 2016-09-15.
CPL Pubid: 102157

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Förbränning

Ämnesområden

Teknisk mekanik

Chalmers infrastruktur