Fundamental mechanisms in premixed turbulent flame propagation via flame–vortex interactions: Part I: experiment

摘要: Abstract A combined experimental and numerical study of the interaction a two-dimensional vortex with planar laminar premixed flames has been carried out. In such flow, flame is subjected to time-varying strain curvature and, hence, may be viewed as model fundamental processes occurring in turbulent flames. Part I paper describes facility diagnostics employed presents results from investigation effects Lewis number, radiative heat losses, unsteadiness on interaction. V-shaped stabilized heated wire constant-area square duct. pair, generated slot duct wall, eventually interacts one fronts. Schlieren smoke flow visualization indicate that field remains over significant part flame–vortex This feature allows use line-of-sight diagnostics, particular, CO ∗ 2 emission imaging technique for determination quantitative release rates. Several fuel oxidizer mixtures are order vary number 0.8 1.6 increase loss parameter by factor 2.6. For conditions investigated, Damkohler numbers important controlling parameters evolution rate losses neglected. II paper, direct simulations pair presented. The were performed using Navier-Stokes solver which variable density temperature-dependent transport coefficients considered. utilize initial experiment used investigate role multistep chemistry