Abstract Airfoil-based self-agitators (AFAs) were installed in multiple plate-fin channels integrated with cantilever beams. The heat transfer enhancement and pressure drop characteristics of this AFA design were experimentally investigated and compared with the clean channel case. We found that the AFA vibrates periodically and generates vortices, which enhance flow mixing and thus heat transfer performance. A rectangular shaped airfoil-based self-agitator (RAFA) and a delta shaped airfoil-based self-agitator (DAFA) with variable chord lengths were designed to investigate shape and size effects on thermal performance. Measurements were also carried out for DAFAs with different layouts, such as multiple rows of DAFAs installed inside a single channel. For the chosen heat sink and assigned working conditions, the best heat transfer performance was obtained with four rows of DAFAs, which caused an 80% increase in overall Nusselt number over the clean channel at the same Reynolds number and a 50% rejected heat increase at the same pumping power due to the strong longitudinal vortices generated by the presence of the AFAs.

中文翻译：

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基于翼型的自搅拌器增强板翅通道空气侧传热

摘要 基于翼型的自搅拌器 (AFA) 安装在与悬臂梁集成的多个板翅通道中。对这种 AFA 设计的传热增强和压降特性进行了实验研究，并与清洁通道情况进行了比较。我们发现 AFA 周期性振动并产生涡流，这增强了流动混合，从而增强了传热性能。设计了具有可变弦长的矩形翼型自搅拌器 (RAFA) 和三角翼型自搅拌器 (DAFA)，以研究形状和尺寸对热性能的影响。还对具有不同布局的 DAFA 进行了测量，例如安装在单个通道内的多排 DAFA。对于选定的散热器和指定的工作条件，