Investigation of the flame stabilization in a swirling flow has been carried out. In non-swirling flow, combustion is carried out in induction mode. Weak swirling of the flow leads to the curvature of the flame and displacement of the combustion zone to the inlet section. The curvature of the flame front in the flow with moderate swirling, exceeds the maximum allowable value, which ensures combustion stabilization, and the flame is extinguished. The intensive swirling leads to formation a recirculation zone in the flow. In this case, hot combustion products in the recirculation zone ignite the combustible mixture entering the channel.
This paper analyses conditions of flame stabilization in a channel with moderate swirling of a flow and low Reynolds numbers. The effect of swirling on the flame structure and localization of the combustion zone is investigated, and the conditions for flameout in flows with a moderate swirling flow are determined.