Experiments on Collapsing Cylindrical Flames

摘要: This article is concerned with the effect of curvature on laminar flame dynamics. topic fundamental interest and it has practical implications in turbulent combustion. It shown that highly curved premixed flames may be obtained by operating a standard axisymmetric burner specific pulsed mode. Collapsing cylindrical are observed submitting to suitably tuned plane pulsations flow velocity. The pattern collapses an essentially radial motion. In these circumstances cylinder separates unburned inner gases from burned outer flow. temporal evolution monitored using schlieren images while velocity determined particle image velocimetry (PIV). data yield stretched burning up very small radii. Models as function compared experimental Markstein lengths deduced. These experiments indicate how respond large values. gathered used guide modeling efforts area