Akademik Veri Yönetim Sistemi
2nd International Conference on Scientific and Innovative Studies (ICSIS 2024), Konya, Türkiye, 18 - 19 Nisan 2024, ss.712-722
Supercharging technology is crucial for enhancing engine performance and reducing emissions per unit power. Nowadays, especially in heavy-duty engines used in land and marine transportation, which require high power and torque values, the positive impact of supercharging becomes more evident when considering the effect of these engines on air pollution. When considering the impact of engines on air pollution, the positive effect of supercharging becomes better understood. Meeting international emission standards for land and marine vehicle engines and aiming for high power with low emissions is essential for manufacturers. In this context, the current study presents the effects of various supercharging conditions (with P2d/P1d values of 1.25, 1.5, 1.75, and 2) on the performance and emissions of a heavy-duty engine under fixed medium speed (1500 rpm) conditions with natural aspiration (λ=3 and P2d/P1d=1), along with different air excess ratios (with λ values of 2, 2.25, 2.5, 2.75, 3, 3.25, 3.5, 3.75, and 4). In the study, numerical results were obtained using the Diesel-Rk program. For achieving lower NOx levels at boosted operation points, a 10% EGR application was employed, and for higher performance values with high volumetric efficiency, intercooling processes were applied. According to the obtained numerical results, compared to the naturally aspirated operating point, significant improvements of approximately 163% in power, 5.36% in BSFC, and 46% in NOx values were observed at the supercharging operating point with P2d/P1d=2 and λ=2. However, there was a 40% increase in PM emissions and a 1.87 bar increase in MPRR value.