Akademik Veri Yönetim Sistemi
AIN SHAMS ENGINEERING JOURNAL, cilt.15, sa.9, ss.1-14, 2024 (SCI-Expanded)
A well-designed exhaust manifold has a positive effect on the efficiency of an engine and exhaust emissions. If the
dimensions and geometric structure of the exhaust manifold are not designed in accordance with the pressure
fluctuations of the fluid, this will have a negative effect on the velocity, temperature, density and pressure of the
flow. In view of this and the high production costs of locomotive diesel engines, the pressure and velocity distributions in the exhaust manifold of a six-cylinder locomotive engine are investigated numerically in this study.
Two different designs for the diesel engine are studied, taking into consideration the area in which the exhaust
manifold will be mounted and the other engine parts. The pressure and velocity variations of the exhaust
manifolds are compared via a computational fluid dynamics analysis, and analyses are performed using test data
from a heavy-duty diesel engine at different power values (225, 450, 675, and 900 HP) and 1500 rpm, with the
aim of finding the optimal design. Since the diameters at the cylinder outlets cannot be changed, the designs are
created to fit within the existing area of the engine area The exhaust outlet is located in the middle of the
manifold in the first model examined here, and is positioned close to the right-hand side of the manifold in the
second model (the existing configuration). It is found that the flow becomes more efficient in the model in which
the outlet is in the middle of the exhaust manifold.