抄録
Experiments of co-axial diffusion flame have been carried out to develop the high efficiency combustion technique by utilizing the electro-magnetic radiant materials. Methane produced by thermal decomposition of hydrocarbon fuels combustion can absorb electro-magnetic rays at the wave number of around 1200 cm^<-1>, which belong to the wave regime of far infrared rays. The main acquisitions obtained for the study are as follows: (1) the temperature rising rates of water container by co-axial diffusion flame in electro-magnetic field are always larger than those of non electro-magnetic fields at the range of 1.1 to 1.7 of air ratio, (2) such a phenomenon makes it possible to establish the combustion of lower air ratio on co-axial diffusion flame and the low air ratio combustion technique may be applied to achieve the high energy saving and reduction of CO_2 emission on many kinds of combustors including boilers.
