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Synchronization of a Pair of Opposed Facing Oscillators in a Side-by-Side Configuration
International Journal of Heat and Fluid Flow ( IF 2.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.ijheatfluidflow.2020.108605
Mehmet N. Tomac , Charles Farbos de Luzan

Abstract This study considers two opposed facing fluidic oscillators in a side-by-side layout. Each fluidic oscillator shares one of its feedback channels with the other oscillator thus this configuration provides a mean for communication between fluidic oscillators. As a result of this communication through the shared feedback channel, the exiting jets of the fluidic oscillator pair are synchronized. The details of this synchronization are revealed by means of hot-wire measurements, flow visualizations and validated numerical simulations. The oscillation frequencies for both jets were the same and varied from 123 Hz to 476 Hz for a flow rate range from 5 SLPM to 25 SLPM per inlet corresponding to Reynolds number range of 2,125 to 10,625. The calculated cross-correlation coefficients were over 0.88 for the considered flow rate range. The flow visualizations exposed that the exiting jet of each fluidic oscillator move away from the shared feedback channel and move toward the shared feedback channel simultaneously indicating motion in the same direction. Numerical results indicated that the shared feedback channel plays a pressure balancing role while allowing inter-oscillator flow through each side of the shared feedback channel thus controlling the flow direction of each exiting jet yielding a synchronized output from the fluidic oscillator nozzles.

中文翻译:

并排配置中一对相对的振荡器的同步

摘要 本研究考虑并排布局中的两个相对的流体振荡器。每个流体振荡器与另一个振荡器共享它的一个反馈通道,因此这种配置提供了流体振荡器之间通信的手段。作为通过共享反馈通道的这种通信的结果,流体振荡器对的退出射流是同步的。这种同步的细节是通过热线测量、流动可视化和经过验证的数值模拟来揭示的。对于对应于雷诺数范围 2,125 到 10,625 的每个入口从 5 SLPM 到 25 SLPM 的流速范围,两种射流的振荡频率相同并且在 123 Hz 到 476 Hz 之间变化。对于所考虑的流速范围,计算出的互相关系数超过 0.88。流动可视化显示,每个流体振荡器的出口射流远离共享反馈通道并向共享反馈通道移动,同时指示在同一方向上的运动。数值结果表明,共享反馈通道起到压力平衡的作用,同时允许内部振荡器流过共享反馈通道的每一侧,从而控制每个出口射流的流动方向,从而产生来自流体振荡器喷嘴的同步输出。
更新日期:2020-08-01
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