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首页> 外文期刊>Advanced Functional Materials >Improving and Predicting Fluid Atomization via Hysteresis- Free Thickness Vibration of Lithium Niobate
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Improving and Predicting Fluid Atomization via Hysteresis- Free Thickness Vibration of Lithium Niobate

机译：通过无滞后的铌酸锂厚度振动改善和预测流体雾化

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摘要

Acoustically driven atomization from the broad perspective of materials choice, vibration mode, and fluid characteristics is considered to identify a simple method for improving both the understanding of the atomization phenomena and the overall efficiency of atomization. Whether by the definition of a "figure of merit" (a function of the transducer quality factor and electromechanical coupling coefficient), its output vibration displacement at a given input power, or the fluid flow rate during atomization, it is found that the combination of single-crystal 127.86 degrees Y-rotated lithium niobate and thickness-mode vibration produces an order of magnitude greater atomization flow rate and efficiency in comparison to all known atomizers, including classic lead zirconate-based devices and newer, Rayleigh wave or Rayleigh/Lamb spurious-mode-based devices alike. By using this improved approach, for the first time, fluids with viscosities up to 48 cP are reported to be atomized, and an atomization Reynolds number Re-A is defined which can be used to both predict the atomization flow rate for Re-A greater than or similar to 40 and the inability to atomize a given fluid at a particular vibration amplitude when Re-A less than or similar to 40.
机译：从材料选择，振动模式和流体特性的广泛角度考虑，声驱动雾化被认为是确定一种简单的方法，可以提高对雾化现象的理解以及雾化的整体效率。根据“品质因数”的定义（换能器品质因数和机电耦合系数的函数），在给定输入功率下的输出振动位移或雾化过程中的流体流速，可以得出以下结论：与所有已知的雾化器相比，单晶127.86度Y轴旋转铌酸锂和厚度模式振动产生的雾化流速和效率高一个数量级，包括经典的锆酸铅基器件和更新的瑞利波或瑞利/兰姆杂散基于模式的设备。通过使用这种改进的方法，首次报道了粘度高达48 cP的流体被雾化，并且定义了雾化雷诺数Re-A，可用来预测Re-A的雾化流速更大。小于或等于40，并且当Re-A小于或等于40时，无法以特定的振动幅度雾化给定的流体。

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