Avaliação do desempenho de uma aleta quasi-fractal para aplicação em dissipadores térmicos aeronáuticos

Abstract

The different mechanisms of heat transfer are fundamental concepts in the design and operation of thermal systems. Equipment extensively used in such systems, a heat sink is a type of heat exchanger designed to intensify the heat transfer between a solid-state object and an adjacent fluid via extended surfaces, known as fins. The problem of increasing surface area in bodies that have volumetric and weight restrictions is recurrent in nature. A common and evident solution to the problem is the use of shapes defined by approximations of fractal geometry. In this work, a comparative analysis, based on a numerical computational model, was carried out for the purpose of determining the thermal performance gain of a fin with shape defined by fractal approximation in relation to a rectangular profile fin.