A study of flame structure for nano-size plastic dust

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560245
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Gunma National College of Technology
• Principal Investigator: HANAI HIRONAO 群馬工業高等専門学校, その他部局等, 准教授 (30312664)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 粉体燃焼 / ナノ / 可燃限界 / 火炎構造

Outline of Final Research Achievements

Combustion characteristics of plastic dusts with nanometer diameter were clarified experimentally. The lean flammability limit and the burning velocity of the dusts were measured by using a cylindrical combustion chamber. The flame structure of the dusts was observed by using a nozzle burner for plastic dusts. The flame behavior for the fine dusts becomes closer that for gaseous fuels. The lean flammability limit of the ultrafine dusts corresponded to that of the gasified plastic dusts approximately. The oscillating flame propagation that was caused by radiation heat transfer, which was observed only under microgravity environment, did not appear for the ultrafine dust flame. The burning velocity for the dusts became smaller value due to the heat loss by radiation heat and heat of gasification. The flame structure for the ultrafine dusts was similar to that for the fine dusts. It showed the brilliant light from luminous flame in the burnt gas.

Free Research Field

燃焼学