The analytical investigation of premixed combustion in cylindrical micro-combustor

• In this study, an analytical model for heat recirculation in cylindrical micro-combustorsis presented, including the effects of heat transfer from the product gas stream in the reaction zoneand post-flame region to the reactant in the preheat zone, structural heat conduction through thecombustor walls and heat loss to ambient. Eventually, the explicit expression for the flame speedin non-adiabatic condition and the implicit expression for adiabatic condition are obtained in thisresearch. In addition, comparison is made between adiabatic and non-adiabatic flame speeds.It is demonstrated that the streamwise heat conduction through the structure of combustorplays an important role in the flame broadening in both adiabatic and non-adiabatic conditions.Moreover, it is shown that reducing the size of the combustor to a submillimetre scale extremelyincreases the surface-to-volume ratio, leading to the decrease in the flame speed and flamequenching.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Kemiska processer (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)

Keyword

heat recirculation effect

analytical approach

non-adiabatic flame speed

micro-combustors

adiabatic flame speed

Publication and Content Type

art (subject category)

ref (subject category)