Recent advances in understanding of thermal expansion effects in premixed turbulent flames
Journal article, 2017

When a premixed flame propagates in a turbulent flow, not only does turbulence affect the burning rate (e.g., by wrinkling the flame and increasing its surface area), but also the heat release in the flame perturbs the pressure field, and these pressure perturbations affect the turbulent flow and scalar transport. For instance, the latter effects manifest themselves in the so-called countergradient turbulent scalar flux, which has been documented in various flames and has challenged the combustion community for approximately 35 years. Over the past decade, substantial progress has been made in investigating (a) the influence of thermal expansion in a premixed flame on the turbulent flow and turbulent scalar transport within the flame brush, as well as (b) the feedback influence of countergradient scalar transport on the turbulent burning rate. The present article reviews recent developments in this field and outlines issues to be solved in future research.

Author

Vladimir Sabelnikov

ONERA Centre de Palaiseau

Andrei Lipatnikov

Chalmers, Applied Mechanics, Combustion

Annual Review of Fluid Mechanics

0066-4189 (ISSN) 1545-4479 (eISSN)

Vol. 49 91-117

Areas of Advance

Transport

Energy

Roots

Basic sciences

Subject Categories

Fluid Mechanics and Acoustics

DOI

10.1146/annurev-fluid-010816-060104

More information

Created

10/7/2017