Heat Transfer Analysis of Swiss-Roll Combustor for Ventilation Air Methane

A thermal equilibrium model of SRC (Swiss-roll combustors) for VAM (ventilation air methane) combustion was developed. Temperature distribution of the combustor was calculated. The effects of inlet velocity, channel structure, and diameter of combustion chamber on the TCC (temperature in combustion chamber) were investigated. It is found that even when the methane volume concentration of inlet VAM remained 1%, the TCC can be higher than 1400K, which exceeds the temperature needed for stable and sustained combustion. The TCC is significantly affected by channel width and channel length, while less by inlet velocity compared with them and the diameter of combustion chamber has little effect on the TCC. Faster inlet velocity and narrower channel width are favorable for enhancing heat transfer and increase the TCC, and longer channel length could increase the TCC effectively, but the factors of temperature, flow resistance, cost, etc. should be considered comprehensively in the design of Swiss-roll combustor.