Specifics of the Combustion Phenomenon Inside a Heavy-Duty Diesel Engine Converted to Natural Gas Lean-Burn Spark Ignition Operation

Spark ignition timing effects on a converted diesel engine using natural gas: A numerical study

“…The results obtained showed that the maximum cylinder pressure increased, two peak formations can be seen in the heat release depending on the spark time, the maximum brake torque and thermal efficiency decrease, the Turbulence Kinetic Energy (TKE) and turbulence dissipation rate in the cylinder increase and the combustion time increased by taking the SIT advanced. 7,[9][10][11][12][13][14][15] When the literature studies are examined in general, it is seen that studies are carried out in engines using natural gas at low compression ratios such as 11:1-16:1. [7][8][9][10][11][12][13][14][15][16][17][18][19] In this study, unlike other studies in the literature, three-dimensional numerical studies were carried out at high speed (2300 rpm) and under full load in an engine with a high compression ratio of 17.5:1 and a special combustion chamber design (stepped lip bowl).…”

“…7,[9][10][11][12][13][14][15] When the literature studies are examined in general, it is seen that studies are carried out in engines using natural gas at low compression ratios such as 11:1-16:1. [7][8][9][10][11][12][13][14][15][16][17][18][19] In this study, unlike other studies in the literature, three-dimensional numerical studies were carried out at high speed (2300 rpm) and under full load in an engine with a high compression ratio of 17.5:1 and a special combustion chamber design (stepped lip bowl). In the study, besides the performance and emission values, incylinder cold flow and combustion phenomena were investigated and the effects of bowl-in piston geometry on in-cylinder combustion characteristics were examined in detail.…”

“…The results obtained showed that the maximum cylinder pressure increased, two peak formations can be seen in the heat release depending on the spark time, the maximum brake torque and thermal efficiency decrease, the Turbulence Kinetic Energy (TKE) and turbulence dissipation rate in the cylinder increase and the combustion time increased by taking the SIT advanced. 7,9–15 When the literature studies are examined in general, it is seen that studies are carried out in engines using natural gas at low compression ratios such as 11:1–16:1. 7–19…”

“…7,9–15 When the literature studies are examined in general, it is seen that studies are carried out in engines using natural gas at low compression ratios such as 11:1–16:1. 7–19…”