Soot Formation in Spherical Diffusion Flames

In the period from 2019 to 2022, joint American–Russian space experiment (SE) Flame Design (Adamant) was carried out on International Space Station (ISS). The purpose of SE study mechanisms control soot formation in a spherical diffusion flame (SDF) formed around porous sphere (PS), and radiative extinction SDF under microgravity conditions. objects this were “normal” “inverse” SDFs gaseous ethylene an oxygen atmosphere with nitrogen addition at room temperature pressures ranging 0.5 2 atm. A normal is oxidizing when fuel supplied through PS. An inverse oxidizer introduced This article presents results calculations SDFs. are based one-dimensional non-stationary model combustion gases detailed kinetics oxidation, supplemented by macrokinetic mechanism formation. indicate that concentrated region where local C/O atomic ratio satisfy conditions 0.32 < 0.44 T > 1300–1500 K.