Abstract
The paper presents results of experimental studies on the methane and propane ignition process in various volumetric compositions of oxidizers heated to temperature higher than ignition point of analyzed fuels (HTAC conditions – High Temperature Air Combustion conditions). The increment of temperature D T and the ignition delay time t ’ are parameters characterizing the process of ignition under these conditions. These parameters are the function of air excess ratio l , temperature of the oxidizer t oxi and the volumetric composition of oxidizer z i . In order to achieve the minimum ignition delay time t ’ and the maximum increment of the temperature D T, the oxidizer temperature didn’t have to be maximized. There is an interval of t oxi in which analyzed parameters reaches its extreme values.
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