The water spraying itself is a dynamic course, and it is affected not only by structural style of ultrasonic gas atomizer and compressed air pressure, but also by movement of compressed air flow and so on in the atomizer. Here, the main principle of fine droplet formation in the ultrasonic gas atomizer is that the liquid sheet is disrupted into droplets by the energy of the high velocity air. If the ultrasonic energy is supplied, finer droplets with high sphericity and uniform size distribution can be achieved. But it is difficult to measure the droplet sizes. An ingenious method of droplet measurement was attempted by capturing the droplets on a filter paper and there are subjected to image analysis to obtain the droplet sizes. However, droplet measurement is complicated and the correctness of the droplet sizes is not high. Also advantage of all of the device newly designed is not defined until the experimental measurement are advanced after they are manufactured. As development of an interpretative program, droplet measurement through the numerical simulation was attempted. This paper deals with the water atomization of ultrasonic gas atomizer by numerical simulation with CFD software-ANSYS Fluent. In this paper, generation of ultrasound is decided in the ultrasonic gas atomizer with resonance chamber and ultrasound characters (frequency, pressure level, power level) are decided. These results are proved through the comparison with experiment. The results indicate that ultrasonic gas atomizer is effective to apply to the industrial field such as dust cleaning process. Rational structure parameter and operating parameter are studied in next issue.

中文翻译：

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超声波气体雾化器中超声波产生及水雾形成的数值模拟

喷水本身是一个动态过程，它不仅受超声波气体雾化器的结构形式和压缩空气压力的影响，还受雾化器内压缩气流的运动等因素的影响。在这里，超声波气体雾化器中形成细小液滴的主要原理是液体片被高速空气的能量破碎成液滴。如果提供超声波能量，则可以获得具有高球形度和均匀尺寸分布的更细小液滴。但是很难测量液滴尺寸。通过在滤纸上捕获液滴并对其进行图像分析以获得液滴尺寸，尝试了一种巧妙的液滴测量方法。然而，液滴测量复杂且液滴尺寸的正确性不高。此外，所有新设计的设备的优势都没有定义，直到它们制造出来后进行了实验测量。作为解释程序的开发，尝试通过数值模拟测量液滴。本文采用CFD软件-ANSYS Fluent进行数值模拟，对超声波气体雾化器的水雾化进行了研究。本文对带谐振腔的超声波气体雾化器中超声波的产生进行了确定，并确定了超声波的特性（频率、压力水平、功率水平）。这些结果是通过与实验的比较来证明的。结果表明，超声波气体雾化器可有效应用于工业领域，如除尘工艺。下期研究合理的结构参数和运行参数。