Experimental and numerical study of flame stability in a rotary flow reversal reactor with ultra-lean toluene/air mixture

•The experimental study is on a self-designed rotary flow reversal reactor.•The flame stability research is related to ultra low calorific value gas energy.•The temperature evolution of the packed bad is studied experimentally.•The 3D numerical simulation using sliding grid technology is presented.•The effects of intake parameters on flame stability are analyzed.