Akademik Veri Yönetim Sistemi
3rd International Conference on Applied Engineering and Natural Sciences, Konya, Türkiye, 25 Temmuz 2022, cilt.1, sa.1, ss.252
This study presents a parametric optimization of ring inserted heat exchanger tube according to
Nusselt number and friction factor. The heat exchanger tube was heated with constant heat flux and flow
conditions is turbulent corresponding to Reynolds number of 25,000. Inner diameter, thickness and pitch
lengths of the rings were considered as factors and each factor is composed of five various levels. The study
was carried out by using a computational fluid dynamics program that is Ansys-Fluent 18.0. Realizable kepsilon turbulence model is employed to simulate the turbulent flow condition. The results showed that
inner diameter, thickness and pitch length of the rings increases, the Nusselt number and the friction factor
tend to decrease. The configuration of the ring inserted heat exchanger tube provides the highest Nusselt
number which is the inner diameter of 17mm, the thickness of 4 mm and the pitch length of 50 mm. On the
other hand, the configuration of the ring inserted heat exchanger tube provides the lowest friction factor
which is the inner diameter of 25 mm, the thickness of 10 mm and the pitch length of 250 mm. When the
results are simultaneously optimized according to both the Nusselt number and the friction factor, it was
found that the best configuration is the inner diameter of 25 mm, the thickness of 2 mm and the pitch length
of 50 mm.