Assessment of a transport equation for mean reaction rate using DNS data obtained from highly unsteady premixed turbulent flames
Journal article, 2019

Recently, a transport equation for the mean rate of product creation in a premixed turbulent flame was derived and a joint closure relation for dominant terms in that equation was developed and validated against Direct Numerical Simulation (DNS) data obtained from weakly turbulent flames. Present communication reports results of further DNS tests of this newly introduced approach, performed using recent data computed under substantially different turbulent conditions. In particular, the ability of the approach to predict significant oscillations of the turbulent burning velocity with time is shown under conditions associated with not only the flamelet but also the thin-reaction-zone regimes of premixed turbulent burning. While such oscillations are documented in the present and other DNS studies, capabilities of other models of premixed turbulent combustion to reproduce this challenging phenomenon have not yet been demonstrated in the literature.

Premixed turbulent flame Mean heat-release rate Combustion oscillations Modeling DNS

Author

Andrei Lipatnikov

Chalmers, Mechanics and Maritime Sciences, Combustion

Sabelnikov V.A.

ONERA Centre de Palaiseau

Alexei Poludnenko

Texas A&M University

International Journal of Heat and Mass Transfer

0017-9310 (ISSN)

Vol. 134 398-404

Driving Forces

Sustainable development

Areas of Advance

Transport

Energy

Roots

Basic sciences

Subject Categories

Fluid Mechanics and Acoustics

DOI

10.1016/j.ijheatmasstransfer.2019.01.043

More information

Latest update

5/21/2019