Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Improvement of the Efficiency of a Twin-fluid Nozzle using Ultrasonic Vibration

초음파 가진을 이용한 2-유체 노즐의 효율 향상

  • Published : 2002.08.01
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Abstract

Characteristics of a twin-fluid spray with ultrasonic vibration were examined in order to obtain a high efficiency of cold-fog spray of the automatic pest control machine which has been widely used in protected horticulture recently. An electrostrictive vibrator of PZT BLT and a magnetostrictive $\pi$-type vibrator were used applied as the ultrasonic transducers with a frequency of 28 kHz. All experiments were conducted in 4 methods of spray ; a conventional spray method without ultrasonic forcing, an indirect vibration method with ultrasonic forcing, an improving-quality method by ultrasonic forced within liquid, and a combined-use method with both of the indirect vibration method and the improving quality method. It was found that the ultrasonic energy increased the atomization efficiency of spray droplets about 10% and especially much more in the case of the combined-use method.

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References

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