Transported JPDF modelling and measurements of soot at elevated pressures

Accurate measurements and modelling of soot formation in turbulent flames at elevated pressures form a crucial step towards design methods that can support the development practical combustion devices. A mass number density preserving sectional model is here combined with transported joint-scalar probability function (JDPF) method enables fully coupled scalar space soot, gas-phase species enthalpy. The approach extended to KAUST non-premixed ethylene-nitrogen from 1 5 bar via an updated global bimolecular (second order) nucleation acetylene pyrene. latter accounts for pressure-induced effects rate fitted using comparisons full detailed chemistry up 20 pressure experimental data WSR/PFR configuration laminar premixed flames. Soot surface growth treated PAH analogy oxidation considered O, OH O2 Hertz-Knudsen approach. impact differential diffusion between particles included by gradual decline diffusivity among sections. Comparisons normalised OH-PLIF PAH-PLIF signals suggest good predictions evolution flame structure. Good agreement was also found predicted volume statistics all pressures. importance intensifies on PSDs more evident larger which tend be fuel rich centreline leading reduced oxidation.