Experimental results of flow pattern and heat transfer in circular-orifice baffled tubes under pure oscillatory flow and compound flow conditions are presented. The hydrogen bubble visualization technique is employed for describing the unsteady flow structure, and particle image velocimetry is used in order to measure the velocity field during eight different phases of the oscillation cycle. The existence of a central jet and the cyclic dispersion of vortices upstream and downstream of the baffles is analyzed. The loss of the flow axisymmetry for ${\mathit{Re}}_{\mathit{osc}}>130$ is clearly identified. Heat transfer measurements under uniform heat flux (UHF) conditions are obtained in a thermal-hydraulic rig, allowing for the description of the influence of net and oscillatory Reynolds numbers on the Nusselt number, using propylene-glycol as working fluid ($\mathit{Pr}=150$). The impact of chaotic mixing, for ${\mathit{Re}}_{\mathit{osc}}>150$, results in a uniform local heat transfer distribution along the reactor cell, as well as in thermal uniformity in the transverse plane of the tube.

给出了在纯振荡流和复合流条件下，圆孔折流板管内流动模式和传热的实验结果。氢气泡可视化技术用于描述非稳态流动结构，粒子图像测速技术用于测量振荡周期的八个不同阶段的速度场。分析了中心射流的存在以及挡板上游和下游涡流的周期性弥散。流轴对称性的损失${\mathit{回覆}}_{\mathit{振荡器}}>130$被明确识别。在热工设备中获得了均匀热通量（UHF）条件下的传热测量结果，使用丙二醇作为工作流体，可以描述净雷诺数和振​​荡雷诺数对Nusselt数的影响（$\mathit{镨}=150$）。混沌混合的影响，对于${\mathit{回覆}}_{\mathit{振荡器}}>150$导致沿反应器单元均匀的局部传热分布，以及在管的横向平面中的热均匀性。