Akademik Veri Yönetim Sistemi
Thermal Science and Engineering Progress, cilt.51, ss.1-13, 2024 (SCI-Expanded)
In an internal combustion engine, the values of the heat
and pressure increase considerably over the combustion cycle. One of the most
effective methods of cooling the piston is the piston cooling gallery. In this
study, we investigated the effects of different geometries of the piston
cooling gallery on piston cooling in a heavy-duty diesel engine, with the aim of
finding the most suitable geometry for piston cooling and increasing heat
dissipation through the piston cooling gallery. To achieve this, the most
suitable piston gallery geometry for piston cooling was first determined. The
diameter of the inlet hole of the oil gallery was then varied, and the diameter
that provided the best results in terms of piston cooling was found. The aim
was to determine the hole diameter of the oil gallery that drew the most heat
into the oil gallery of the piston and reduced the piston temperatures the
most. Based on our experimental results for a piston in a heavy-duty diesel
engine, computational fluid dynamics analyses were performed and newly designed
geometries for the piston oil gallery were compared with the existing geometry.
Analyses were then performed by changing the diameter of the inlet hole
diameter of the oil gallery for a given geometry. The amount of heat transferred
into the oil gallery was evaluated based on the diameter of the oil gallery inlet
hole and the maximum temperature at the top of the piston. As a result of these
analyses, the geometry of the piston cooling gallery and the diameter of the
oil inlet hole that ensured the highest heat transfer and the lowest piston
temperature were determined.