This study experimentally investigated the heat transfer characteristics of the heat sink situated in a rectangular channel with the axial main flow under a transverse synthetic jet. The heat sinks, made of aluminum alloy, were divided into three kinds: the finned heat sinks, the in-line pin-fin heat sinks and the pure aluminum-foam heat sink. Total 7 heat sinks were used as test specimens. There was a fixed bypass space between the heat sink and the upper cover of the channel. The synthetic-jet device was separately placed above the leading edge of heat sink, normally above the heat sink and above the trailing edge of heat sink. Under current test parameters, the heat transfer capability of the system with the synthetic jet was around four times that without the synthetic jet. When the value of Rej/Re was bigger than 2.4, the synthetic jet would enhance the heat transfer of the present cooling system above 50%. The cases with the smaller diameter of synthetic-jet nozzle had the better heat transfer enhancement. The Nusselt number of the pure aluminum-foam heat sink was the lowest, and its heat transfer was lower than that of the highest group by 30 ~ 40%.

这项研究实验研究了散热器的传热特性，该散热器位于矩形通道中，在横向合成射流下具有轴向主流。由铝合金制成的散热器分为三种：翅片式散热器，直列式针翅式散热器和纯铝泡沫散热器。总共7个散热器用作测试样本。散热器和通道的上盖之间有一个固定的旁路空间。合成喷射装置分别放置在散热器的前缘上方，通常在散热器上方和散热器后缘上方。在当前的测试参数下，具有合成射流的系统的传热能力约为没有合成射流的系统的四倍。当Rej / Re的值大于2.4时，合成射流将使现有冷却系统的热传递提高50％以上。合成喷嘴直径较小的情况具有更好的传热效果。纯铝泡沫散热器的Nusselt数最低，其热传递比最高的泡沫低30％至40％。