Abstract: The study displayed the heat transfer in a rectangular perforated fin plate by natural convection type, experiments produced through in an experimental facility designed and built a unique device for this study. And simulated with ANSYS program. The fins that used in this study including five types, the first one without perforated and the perforations were used with the remains fins by different shape as circular perforation these fins perforation by a different number of circles (1, 2, 4 and 8 circles) the cross-section area is same for all perforations fins (28.26 cm2) for all perforated fin. These perforations distributed on 1 circle have a 60 mm diameter and after that divided to 2 circles have diameter 30 mm, the 2 circles also divided to 4 circles have diameter 15 mm and the last one has 8 circles with 7.5 mm diameter is produced from divided the 4 circles perforated fin. The experiment is processed for different power is ranged from (30, 60 and 90 W). The results for practical side shows the temperature drops along the length, the temperature dropped in non-perforated fin was (31.9-28°C) at 30 W but for perforated fin maximum drop was (31.9-27.5°C) for one circle perforated fin also observed the temperature drop at 60 W along the non-perforated fin was (86.6-76°C) but for perforated fin maximum drop was (86.6-74.3°C) at one circle perforated. The last one was at 90 W for non-perforated fin was (105.9-94.48°C) but for perforated fin was from (105.9-89.9°C).
Aram Mohammed Ahmed, Mohammed Ghazy Habbeb and Iesam Jondi Hasan, 2019. Study on the Circular Perforations Effect in the Rectangular Fins on Convection Heat Transfer. Journal of Engineering and Applied Sciences, 14: 9066-9072.