A Study of Thermo-structural Behavior of Annular Fin
Adding an annular/radial fin to a heat exchanger increases the surface area in interaction with the surrounding fluid, thus increasing the convective heat transfer between the object and surrounding fluid. Since surface area increases as length from the object increases, an annular fin transfers more heat than a similar pin fin at any given length. The present work involves computation of temperature gradient followed by the determination of thermal stresses in radial and tangential direction, radial displacements, and strains of annular fins and compares the results for different aspect ratio (ratio of the inner radius to outer radius) by varying inner radius of the annular fin. A general second-order non-linear ordinary differential equation has been derived for all the parameters as the governing equation. The performance parameters of the annular fins for different aspect ratio have been calculated and plotted on graphs.
KeywordsAnnular fin Aspect ratio Temperature distribution Thermal stresses Isotropic material Axisymmetric investigation
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