INVESTIGATION OF THE EFFECTS OF ANGLED V-SHAPED TURBULATIONS PLACED IN A HEAT EXCHANGER PIPE ON THE THERMAL PERFORMANCE FACTOR WITH ANSYS-FLUENT


Fırat İ.

9TH INTERNATIONAL CONGRESS ON SCIENTIFIC RESEARCH AND INNOVATION, Venice, Italy, 28 - 29 September 2024, pp.187-197

  • Publication Type: Conference Paper / Full Text
  • City: Venice
  • Country: Italy
  • Page Numbers: pp.187-197
  • Erzincan Binali Yildirim University Affiliated: Yes

Abstract

Rapid developments in various industries have triggered scientists, engineers and researchers to improve the performance and efficiency of heat transfer systems. Therefore, continuous research is being carried out to increase heat transfer performance and as a result, it is aimed to use more efficient heat exchangers and cooling systems. In this study, the effects of angled V-shaped turbulators placed in a circular shaped pipe under turbulent flow conditions on heat transfer and friction factor were investigated. Water was used as the working fluid. The analyses were carried out under turbulent flow conditions in the range of Re = 12427 - 20712. Initially, analyses of the circular shaped test pipe were performed. The obtained empty pipe results were compared with the correlations accepted in the literature. Then, the pipe analyses with 10o angled V-shaped turbulators placed in the test pipe were examined. According to the obtained results, the effects of V-shaped turbulators on heat transfer, friction factor and thermal performance were examined. According to the obtained results, the graphic curves obtained in all turbulent cases were obtained above the empty pipe graphic curves. For increasing Reynolds number due to increasing fluid flow rate, Nusselts number values ​​increased while friction factor values ​​decreased. The presence of 10o angled V shaped turbulators in the test pipe increased heat transfer and friction factor with increasing fluid contact surface area. Maximum Nusselts increase rate compared to empty pipe increased by 15.04% at Re=15876. Maximum friction factor increase compared to empty pipe was 87.95% at Re=20712. While the lowest TPF value was 0.913 at Re=12427, it was concluded that the highest TPF value was 0.933 for Re=15876.