New concept combustion technologies with heat and mass recirculation
・Micro-, Mild and Microgravity combustions
・Flame structure diagnostic by micro flow reactor with prescribed temperature profile
・Combustion with surrogate fuels, biomass, and synthetic fuels
・Combustion in porous media
Three directions of researches on new concept combustion in extreme conditions will be introduced. These three directions are all based on common key concept, “combustion with heat and/or mass transfer managements.”
First, research and development on “microcombustion” are presented. Highly efficient Swiss roll microcombustor as general heating device and original new method “flame chromatography” for reaction kinetics study will be introduced. Second, fundamental combustion experiments conducted under microgravity environments for constructing comprehensive combustion limit theory will be presented. Discussion on the combustion limits which comprehensively cover both ordinary deflagration flame and peculiar phenomena termed “flame ball” is introduced. Finally, “high temperature oxygen combustion technology, HiTOx” which enables 40 % higher thermal efficiency compared with the ordinary heating furnace is introduced.