The life of an annular fin is shortened by the thermal stress developed due to the temperature difference along the length of the fin. However, the thermal stress in fin arrays is yet to be analyzed in detail. Because of that fact, the design of an annular fin array is formulated here as a multiobjective optimization problem, primarily for maximizing the heat transfer rate and minimizing the developed maximum thermal stress. For further assessment, minimization of the total fin volume of the array and maximization of the surface efficiency are considered as two additional objective functions. Considering an array of identical fins having a plane profile, the half-thickness at the base, the half-thickness at the tip, and the outer radius of an individual fin along with the number of fins in the array are taken as four design variables. Evaluating through the hybrid spline difference method, the four objective functions are optimized in different combinations by employing nondominated sorting genetic algorithm II. The proposed procedure should help a designer to choose a compromise fin array configuration from a set of tradeoff optima based upon the availability of resources.
Multiobjective Optimization of Annular Fin Array Subject to Thermal Load
Journal of Thermophysics and Heat Transfer ; 33 , 1 ; 254-263
2018-10-29
10 pages
Article (Journal)
Electronic Resource
English
Multiobjective structural optimization
Springer Verlag | 1986
|Multiobjective Collaborative Optimization
Online Contents | 1997
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