Effect of confinement ratio on flame structure and blow-off characteristics of swirl flames
Experimental Thermal and Fluid Science(2022)
摘要
•The macrostructure and blow-off characteristics of swirling flame with different confinement rates were studied.•The increase of CR in the confined combustor is helpful to enhance the resistance to stretch-induced extinction.•The ISL vortexes accelerate the flame blow-off near the lean limit.•The downstream ORZ is helpful to stabilize the flame near blow-off with CR = 3.•The transition process from a stable to an unstable flame is extended by increasing the CR of the confined combustor.
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关键词
Swirl flame,Flame stabilization,Blow-off limit,Flame macrostructure transition,Confinement ratio
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