最小热阻法优化自然对流肋片散热器

Resistance analysis is one popular method of heat transfer process, by way of heat sinks, which increases the effective exposed area between heat source and surroundings, how to design an appropriate model that obtains least resistance is an important problem in the subject of thermal design. Whereas the affiliations between resistance and heat transfer coefficient of natural convective heat sinks, we get the heat transfer coefficient via specific algorithm, as a result, resistance is the single function of fin geometry. To calculate the resistances corresponding to different fin dimensions, the optimized fin dimension parallels to the least resistance. And the results indicate: the ratio of fin spacing to fin height exerts influence on total resistance of heat sinks in significant measure, there are figures at the end of this paper, that plot heat transfer coefficients and resistances when fin dimensions amount to different values.