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Sensors 2018, 18(4), 934; https://doi.org/10.3390/s18040934

The Effect of Vibration Characteristics on the Atomization Rate in a Micro-Tapered Aperture Atomizer

1,2
,
1,2,* , 3,* and 4
1
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
College of Mechanical and Electrical Engineering, Guangzhou University, Guanzhou 510006, China
3
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
4
Taizhou Polytechnical Institute, Taizhou 225300, China
*
Authors to whom correspondence should be addressed.
Received: 25 January 2018 / Revised: 28 February 2018 / Accepted: 20 March 2018 / Published: 21 March 2018
(This article belongs to the Special Issue Ultrasonic Sensors 2018)
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Abstract

Because little is known about the atomization theory of a micro-tapered aperture atomizer, we investigated the vibration characteristics of this type of atomizer. The atomization mechanism of a micro-tapered aperture atomizer was described, and the atomization rate equation was deduced. As observed via microscopy, the angle of the micro-tapered aperture changes with the applied voltage, which proved the existence of a dynamic cone angle. The forward and reverse atomization rates were measured at various voltages, and the influence of the micro-tapered aperture and its variation on the atomization rate was characterized. The resonance frequency of the piezoelectric vibrator was obtained using a laser vibrometer, and the atomization rates were measured at each resonance frequency. From experiments, we found that the atomization rates at the first five resonance frequencies increased as the working frequency increased. At the fifth resonance frequency (121.1 kHz), the atomization rate was maximized (0.561 mL/min), and at the sixth resonance frequency (148.3 kHz), the atomization rate decreased significantly (0.198 mL/min). The experimental results show that the vibration characteristics of the piezoelectric vibrator have a relatively strong impact on the atomization rate. This research is expected to contribute to the manufacture of micro-tapered aperture atomizers. View Full-Text
Keywords: micro-tapered aperture; angle changes; atomization rate; vibration characteristics micro-tapered aperture; angle changes; atomization rate; vibration characteristics
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Yan, Q.; Zhang, J.; Huang, J.; Wang, Y. The Effect of Vibration Characteristics on the Atomization Rate in a Micro-Tapered Aperture Atomizer. Sensors 2018, 18, 934.

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