RUI: Experimental and Theoretical Studies on Ultrasound- Modulated Two-Fluid Atomization

本文将从实验和理论两个方面对双流体雾化进行研究：超声调制雾化的机理、毛细管波理论的应用以及毛细管波泰勒模式破碎的作用。将超声调制比作压力旋流喷嘴中的压电调制。这项研究将探索一种P.I.发明的性能，这种发明利用了超声波和更高速度的空气产生的液体毛细管波之间的共振。基于Taylor和Jeffreys的幅度增长率线性理论，提出了一种雾化的理论方法。在实验过程中，超声频率和功率流参数、湍流度和流体流变性将发生变化。本科生和研究生将参与该项目。如果成功，这项工作将有助于改进均匀液滴和粉末的生产方法，在先进材料、喷涂和废物最小化方面具有潜在的应用前景。

Several aspects of two-fluid atomization will be investigated by experimental and theoretical means: the mechanisms of ultrasound modulated atomization, application of capillary wave theory, and the role of Taylor-mode breakup of capillary waves. Ultrasound modulation will be compared to piezoelectric modulation in pressure swirl nozzles. The research will explore the performance of an invention of the P.I. that take advantage of the resonance between liquid capillary waves generated by ultrasound and by higher velocity air. A theoretical approach of atomization is proposed based on the linear theory of amplitude growth rates of Taylor and Jeffreys. The ultrasound frequency and power flow parameters, turbulence level, and fluid rheological properties will be varied during the experiments. Undergraduate and graduate students will be involved in the project. If successful, the work will contribute to improved production methods for uniform droplets and powders, with potential applications in advanced materials, spray coating, and waste minimization.