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TECHNICAL PAPERS

High-Frequency Ultrasonic Atomization With Pulsed Excitation

[+] Author and Article Information
A. Lozano

LITEC/CSIC, Maria de Luna, 10, 50018-Zaragoza, Spain   e-mail: alozano@litec.csic.es

H. Amaveda

Centro Politécnico Superior de Ingenieros, Area de Mecánica de Fluidos, Universidad de Zaragoza, Maria de Luna, 3, 50015-Zaragoza, Spain  

F. Barreras

LITEC/CSIC, Maria de Luna, 10, 50018-Zaragoza, Spain

X. Jordà, M. Lozano

Centre Nacional de Microelectrònica (CNM-CSIC), Campus UAB, 08193 Bellaterra, Cerdanyola del Vallès, Spain

J. Fluids Eng 125(6), 941-945 (Jan 12, 2004) (5 pages) doi:10.1115/1.1603301 History: Received April 30, 2002; Revised April 30, 2003; Online January 12, 2004
Copyright © 2003 by ASME
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References

Figures

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Impedance plot of a typical piezoelectric transducer
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Electrical circuits equivalent to a ceramic disk: (a) simple R-L-C circuit; (b) set of R-L-C branches, in parallel with the CO capacitance
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H-bridge topology of the DC-AC power converter operated in ZVS conditions
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Current and voltage waveforms of the transducer during the atomization process at 1,668 MHz
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Image of the piezoceramic disk used in the present experiments, during the atomization process
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Cone formation on the liquid surface when rising the voltage to 10 V
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Variation of the droplet size distribution with voltage
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Mean diameter, D10, mass mean diameter, D30, 10 percent and 50 percent volume percentiles, Dv0.1 and Dv0.5 as a function of the forcing voltage. All these parameters have been derived from the distributions in Fig. 7.
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Volume fraction of droplets with diameter below 5 μm as a function of the excitation voltage
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Atomization rate as a function of voltage
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Intensity and power required for the atomization when forcing at increasing voltages
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Energy required to atomize 1 ml of water as a function of voltage

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