A virtual chemistry model for soot prediction in flames including radiative heat transfer

A turbulent combustion model for soot formation at the LES subgrid-scale using virtual chemistry approach

“…The range of application of reduced virtual schemes is given by the operating conditions and flame configurations covered by the learning database [22]. The virtual chemistry model is composed of a main scheme, dedicated to capture heat release and temperature, and one or more satellite sub-mechanisms devoted to pollutant prediction such as CO [22], NO x [23] or soot [6]. In the present study, the main mechanism for ethylene-air combustion from [6] is retained:…”

“…The virtual chemistry model is composed of a main scheme, dedicated to capture heat release and temperature, and one or more satellite sub-mechanisms devoted to pollutant prediction such as CO [22], NO x [23] or soot [6]. In the present study, the main mechanism for ethylene-air combustion from [6] is retained:…”

“…Consequently, kinetic reduction techniques such as tabulated methods [2,3], analytically reduced chemistry approaches [4] and global optimized chemistry [5] have been developed. In particular, a reduced chemistry method based on the virtual chemistry concept has recently been proposed by Maldonado Colmán et al [6] to predict the soot volume fraction at very low CPU cost. This new approach accounts for a "soot chemistry" representation that envelops both soot particle dynamics and soot surface reactivity [6].…”

“…In particular, a reduced chemistry method based on the virtual chemistry concept has recently been proposed by Maldonado Colmán et al [6] to predict the soot volume fraction at very low CPU cost. This new approach accounts for a "soot chemistry" representation that envelops both soot particle dynamics and soot surface reactivity [6].…”

“…The objective of the present paper is to develop a turbulent combustion model for soot formation. Chemical kinetics will be based on the virtual chemistry methodology recently extended to soot [6] and validated on laminar flame configurations. An original hybrid turbulent combustion model formulation is proposed, which degenerates to the flamelet regime in the flame front region and to a PSR formalism in the post-flame zone, characterized by slow soot chemistry.…”