在板式翅片散热器的基础上,通过增加不同数量和半径的半圆柱肋片,构造了6种不同结构的半圆柱板翅片散热器(HPPFHS),并通过数值模拟的方法对这两种散热器的流动和传热特性进行了研究。结果表明,随着入口风速的增加,两种散热器的热阻减小的同时压降随之增大,但其热阻减小的趋势变小。入口风速相同时,相比板式翅片散热器,流经半圆柱板翅片散热器的空气受到半圆柱肋片的影响产生涡流,因而减少了热阻,同时增加了压降,但其综合性能远好于板式翅片散热器。 Based on the plate-fin heatsink, six kinds of semi-cylindrical plate finned heatsinks (HPPFHS) with different structures were constructed by adding semi-cylindrical fins of different numbers and radii, and the numerical simulations were performed on the two Radiator flow and heat transfer characteristics were studied. The results show that with the increase of inlet air velocity, the pressure drop increases with the decrease of the thermal resistance of the two kinds of radiators, but the decrease of thermal resistance decreases. At the same inlet air velocity, the air flowing through the semi-cylindrical finned radiator is swirled by the semi-cylindrical fins, resulting in reduced thermal resistance and increased pressure drop compared to the plate finned radiator, but its combined performance Far better than the plate finned radiator.