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NUMERICAL INVESTIGATION ON THE EFFECTS OF NATURAL GAS AND HYDROGEN BLENDS ON ENGINE COMBUSTION
No full textNumerical Investigation on the Effects of Natural Gas and Hydrogen Blends on Engine Combustion
No full textAbstract
The use of hydrogen blended with natural gas is a viable alternative to pure fossil fuels
because of the expected reduction of the total pollutant emissions and increase of effi-
ciency. These blends offer a valid opportunity for tackling sustainable transportation, in
view of the future stringent emission limits for road vehicles. The aim of the present paper
is the investigation of the performance of internal combustion engines fuelled by such
blends. A numerical investigation on the characteristics of natural gas–hydrogen blends as
well as their effect on engine performance is carried out. The activity is focused on the
influence of such blends on flame propagation speed. Combustion pattern modelling
allows the comparison of engine brake efficiency and power output using different fuels.
Results showed that there is an increase in engine efficiency only if Maximum Brake
Torque (MBT) spark advance is used for each fuel. Moreover, an economic analysis has
been carried out to determine the over cost of hydrogen in such blends, showing percent
increments by using these fuels about between 10 and 34%
Numerical modelling of internal combustion engines fuelled by hydrogen – natural gas blends
No full text
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