The Effect of the Eccentricity of the Annular Fin in the Bundle of Fins Exposed to Flow on Its Thermal Stresses

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

2 Department of mechanical engineering, University of Sistan and Baluchestan, Iran

3 Department of mathematics, University of Sistan and Baluchestan.Zahedan,Iran

Abstract

In this paper, the effect of the passed fluid flow around a fin in the bundle of annular fins with different eccentricities on thermal stresses created in it is discussed. To solve the turbulent fluid flow equations and thermal stress in solid, the volume element with the k-ε model and finite element methods are used, respectively. The results are obtained for 2 fin spacing and 4 heights of fins. Then, in each fin height, the effect of 5 eccentricities on the decrease of thermal stress is considered. The results show that at each fin height, there is an optimal eccentricity for which the thermal stress in the fin reaches its minimum value. The results show that the maximum decrease of thermal stress in optimal eccentricity related to fin height of 4mm for both fin spacing of 4 mm and 8mm is 30, and 35% respectively. According to the results of this paper, although the difference between both pressure drop and heat transfer values in two eccentricity optimal cases and concentric cases are negligible, thermal stress reduction is observable.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 54, Issue 11
February 2023
Pages 2621-2644

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