报告题目：Combustion and direct energy conversion inside a micro-combustor
报 告 人： Prof. Wei Chen
报告时间： 2016年4月12日（星期二）下午3：00
报告地点： 苏州大学本部物理科技楼237
报告摘要：Electrical energy can be generated by employing a micro-thermophotovoltaic (TPV) cell which absorbs thermal radiation from combustion taking place in a micro-combustor. The stability of combustion in a micro-combustor is essential for operating a micro-power system using hydrogen and hydrocarbon fuels as energy source. To understand the mechanism of sustaining combustion within the quenching distance of fuel, this study proposed an annular micro combustion tube with recirculation of exhaust heat. To explore the feasibility of combustion in the micro annular tube, the parameters influencing the combustion namely, quenching diameter, and flammability were studied through numerical simulation. The results indicated that combustion could be realized in micro- combustor using heat recirculation. Following results were obtained from simulation. The quenching diameter reduced from 1.3mm to 0.9 mm for heat recirculation at equivalence ratio of 1; the lean flammability was 2.5%–5% lower than that of without heat recirculation for quenching diameters between 2 mm and 5 mm. The overall energy conversion efficiency varied at different inner diameters. A maximum efficiency of 3.15% was achieved at an inner diameter of 1 mm. The studies indicated that heat recirculation is an effective strategy to maintain combustion and to improve combustion limits in micro-scale system.
报告人简介：Wei Chen is an associate professor in Department of Thermal and Power Engineering at China University of Mining and Technology (CUMT). Prior to joining CUMT, Dr. Chen worked as a senior mechanical engineer for Lubrizol Corporation in Houston, Texas, USA. Dr. Chen received his B.S. in Thermal and Power Engineering from Soochow University in 2004, and his M.S. and Ph.D. in Mechanical Engineering from Texas A&M University in 2008 and 2012, respectively. Dr. Chen
报 告 人： Prof. Wei Chen
报告时间： 2016年4月12日（星期二）下午3：00
报告地点： 苏州大学本部物理科技楼237
报告摘要：Electrical energy can be generated by employing a micro-thermophotovoltaic (TPV) cell which absorbs thermal radiation from combustion taking place in a micro-combustor. The stability of combustion in a micro-combustor is essential for operating a micro-power system using hydrogen and hydrocarbon fuels as energy source. To understand the mechanism of sustaining combustion within the quenching distance of fuel, this study proposed an annular micro combustion tube with recirculation of exhaust heat. To explore the feasibility of combustion in the micro annular tube, the parameters influencing the combustion namely, quenching diameter, and flammability were studied through numerical simulation. The results indicated that combustion could be realized in micro- combustor using heat recirculation. Following results were obtained from simulation. The quenching diameter reduced from 1.3mm to 0.9 mm for heat recirculation at equivalence ratio of 1; the lean flammability was 2.5%–5% lower than that of without heat recirculation for quenching diameters between 2 mm and 5 mm. The overall energy conversion efficiency varied at different inner diameters. A maximum efficiency of 3.15% was achieved at an inner diameter of 1 mm. The studies indicated that heat recirculation is an effective strategy to maintain combustion and to improve combustion limits in micro-scale system.
报告人简介：Wei Chen is an associate professor in Department of Thermal and Power Engineering at China University of Mining and Technology (CUMT). Prior to joining CUMT, Dr. Chen worked as a senior mechanical engineer for Lubrizol Corporation in Houston, Texas, USA. Dr. Chen received his B.S. in Thermal and Power Engineering from Soochow University in 2004, and his M.S. and Ph.D. in Mechanical Engineering from Texas A&M University in 2008 and 2012, respectively. Dr. Chen