Excitation-Induced Heat Transfer Augmentation in Ribbed Ducts

本文的实验和分析研究考虑了肋管流动中剪切层不稳定性的共振激发对传热的潜在增强作用。具体的兴趣是在各种流动和几何条件下由外声源激励引起的激励诱导增强的程度。局部壁面传热的时间演变将被测量并与瞬时流动行为联系起来。补充的数值研究将评估建模能力并扩展实验参数范围。增强传热在许多应用中都很重要，包括电子冷却和热交换器设计。本研究通过外部激励和流动不稳定性的耦合来解决传热增强问题。流动不稳定性的增强已经被记录下来，因此这项研究的新部分是使用外部激励。这种技术有可能显著增强。

This experimental and analytical investigation considers the potential heat transfer enhancement from resonant excitation of the shear-layer instability in a ribbed duct flow. The specific interest is in the degree of excitation-induced enhancement for various flow and geometrical conditions resulting from external acoustic source excitation. The timewise evolution of the local wall heat transfer will be measured and linked to the instantaneous flow behavior. The complementary numerical study will assess the modeling capabilities and extend the experimental parameter range. The enhancement of heat transfer is important in many applications including electronics cooling and heat exchanger design. This research addresses heat transfer augmentation through the coupling of an external excitation and flow instability. The enhancement by flow instability has been documented so that the new part of this research is the use of external excitation. There is a potential for significant enhancement by this technique.