Characteristics of the flame distribution using alternative types of fuels in the combustion chamber with variable volume

Results of an experimental research of the average velocity of the flame distribution in the main phase of combustion using methane and gasoline and with the addition of hydrogen to these types of fuel-air mixture are presented. Evaluation of changes of the average velocity of the flame distribution is executed. Graphical dependences of the average velocity of the flame distribution which show different character of their changes for gasoline and methane from the composition of fuel-air mixture are obtained. The maximum of the velocity of the flame distribution for methane-air and methane-hydrogen-air mixtures is achieved at the excess air ratio α about 1,1 while for gasoline-air and gasoline-hydrogen-air mixtures in the α range of 0,85-0,9. Moreover, for gasoline velocity of the flame distribution is higher for the entire range of the fuel-air mixture. With the addition of hydrogen in an amount of 3 and 5 % by weight for gasoline and 5 and 10 % by weight for methane velocities of the flame distribution are increased for the entire range of the fuel-air mixture with the increase of the benefit with more the mixture is lean. For gasoline-air mixture the addition of hydrogen is more efficient than for methane at the range of α higher than 1,0.

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