Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics submitted time 2018-02-01 Cooperative journals: 《工程热物理学报》
Abstract: A novel counterflow flame apparatus that can meet the requirement of heterogeneous combustion of pulverized coal particles was developed. A new micro-scale powder feeding system was developed based on the fundamental of deagglomeration by particle-wall impaction, achieving a perfect dispersion and stable feeding rate of coal particles in low carrier flows. With the advanced ICCD optical technology, the behavior of coal particles across the counterflow flame was observed. Results show that the particle heat rate can reach as high as 105 K/s, while flame temperature and particle residence time are the dominant factors that influence the ignition mechanism in the post-flame zone.