Combustion characteristics of dimethyl ether-air-N2/CO2 premixed mixtures were studied in a constant volume bomb under different dilution ratios and equivalence ratios at room temperature and atmospheric pressure. N2 and CO2 were used as the diluents for the dimethyl ether-air mixture premixed combustion. The gas temperature and the normalized mass burning rate were calculated based on a two-zone model and the recorded pressure data. The results show that the peak combustion pressure, the normalized mass burning rate, the maximum temperature of the burned gases show the decrease with the increase of dilution ratio whereas the flame development duration and the rapid combustion duration increase with the increase of the dilution ratio. CO2 presents the larger influence on combustion temperature than that of N2 as the diluent in the dimethyl ether-air-diluent mixture combustion.
|Number of pages
|Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)
|Published - 1 May 2008