INVESTIGATION OF THE EFFECT OF CONICAL RING PIPES ON THERMAL PERFORMANCE IN HEAT EXCHANGERS BY CFD METHOD

24th CONGRESS ON THERMAL SCIENCE AND TECHNOLOGY WITH INTERNATIONAL PARTICIPATION, Ankara, Türkiye, 06 Eylül 2023 - 08 Ocak 2024, cilt.2, ss.885-892

Heat exchangers are devices designed to transfer the heat of one fluid to another fluid. These devices play

an important role in heat transfer processes used to increase or decrease the temperature of a fluid. In this study,

numerical analyzes have been carried out to examine the heat transfer properties of the fluid passing through the heat

exchanger tube on which perforated conical rings have been added. Straight pipe, conical ring pipe, 2-hole conical

ring pipe, and 4-hole conical ring pipe have been used in the analysis. In the analyzes made, the inlet diameter of the

conical rings has been determined as 60 mm, the outlet diameter as 30 mm, and the hole diameter as 5 mm. Analyzes

- has been

chosen as the turbulence model. Nusselt number and friction factor values obtained from the results of analyzes using

different geometries have been compared with each other. In addition, the results of the calculations using the 4-hole

conical ring pipe have been compared with the experimental data in the literature. It has been seen that the data

obtained from the analyzes made as a result of the validation have been compatible with the experimental data. As a

result, it shows that the highest thermal efficiency in terms of heat transfer has been obtained from the analyzes using

a 4-hole conical ring pipe among the selected geometries. The main reason for this is thought to be stronger

turbulence intensity and flow disturbance near the core regions.