In the introductory part of the thesis, a brief explanation about the dynamic of bubble cavitation in homogenous and heterogeneous nucleation, pressure domain bubble growth and collapse. A review of methods used for the calibration of piezoelectric film sensors was elaborated to select the most appropriate method for the cavitation aggressiveness measurement. Regarding the sort pulse duration, the pencil-lead breaking method was selected. The test using the drop ball method was used performed for the comparison. To realize the calibration method an experimental assembly for the pencil-lead breaking method was designed and manufactured. Two kinds of sensors were tested using the pencil lead breaking method and the drop ball method. Pencil-lead breaking calibration two different hardness of 2mm pencil lead with two protruding lengths. The resulting constants are directly applicable to any measurements using tested PVDF films. The applicability of the pencil-lead breaking method was discussed resulting in the extension and modification of the experiment.
Anotace v angličtině
In the introductory part of the thesis, a brief explanation about the dynamic of bubble cavitation in homogenous and heterogeneous nucleation, pressure domain bubble growth and collapse. A review of methods used for the calibration of piezoelectric film sensors was elaborated to select the most appropriate method for the cavitation aggressiveness measurement. Regarding the sort pulse duration, the pencil-lead breaking method was selected. The test using the drop ball method was used performed for the comparison. To realize the calibration method an experimental assembly for the pencil-lead breaking method was designed and manufactured. Two kinds of sensors were tested using the pencil lead breaking method and the drop ball method. Pencil-lead breaking calibration two different hardness of 2mm pencil lead with two protruding lengths. The resulting constants are directly applicable to any measurements using tested PVDF films. The applicability of the pencil-lead breaking method was discussed resulting in the extension and modification of the experiment.
Klíčová slova
cavitation, ball drop calibration, pencil-lead breaking calibration
Klíčová slova v angličtině
cavitation, ball drop calibration, pencil-lead breaking calibration
Rozsah průvodní práce
61
Jazyk
AN
Anotace
In the introductory part of the thesis, a brief explanation about the dynamic of bubble cavitation in homogenous and heterogeneous nucleation, pressure domain bubble growth and collapse. A review of methods used for the calibration of piezoelectric film sensors was elaborated to select the most appropriate method for the cavitation aggressiveness measurement. Regarding the sort pulse duration, the pencil-lead breaking method was selected. The test using the drop ball method was used performed for the comparison. To realize the calibration method an experimental assembly for the pencil-lead breaking method was designed and manufactured. Two kinds of sensors were tested using the pencil lead breaking method and the drop ball method. Pencil-lead breaking calibration two different hardness of 2mm pencil lead with two protruding lengths. The resulting constants are directly applicable to any measurements using tested PVDF films. The applicability of the pencil-lead breaking method was discussed resulting in the extension and modification of the experiment.
Anotace v angličtině
In the introductory part of the thesis, a brief explanation about the dynamic of bubble cavitation in homogenous and heterogeneous nucleation, pressure domain bubble growth and collapse. A review of methods used for the calibration of piezoelectric film sensors was elaborated to select the most appropriate method for the cavitation aggressiveness measurement. Regarding the sort pulse duration, the pencil-lead breaking method was selected. The test using the drop ball method was used performed for the comparison. To realize the calibration method an experimental assembly for the pencil-lead breaking method was designed and manufactured. Two kinds of sensors were tested using the pencil lead breaking method and the drop ball method. Pencil-lead breaking calibration two different hardness of 2mm pencil lead with two protruding lengths. The resulting constants are directly applicable to any measurements using tested PVDF films. The applicability of the pencil-lead breaking method was discussed resulting in the extension and modification of the experiment.
Klíčová slova
cavitation, ball drop calibration, pencil-lead breaking calibration
Klíčová slova v angličtině
cavitation, ball drop calibration, pencil-lead breaking calibration
Zásady pro vypracování
A review of methods used for the calibration of piezoelectric film sensors
The selection of an appropriate method for the calibration of piezoelectric film sensors used for the measurement of the cavitation aggressiveness
The design of an experimental assembly for the realization the selected calibration method
The calibration of piezoelectric film sensors with the selected calibration method
Application of the sensors calibrated by the selected method to the measurement of the aggressiveness of an ultrasonic cavitation field
The critical evaluation of the results obtained by the selected calibration method
The recommendations for the application of the selected calibration method
Zásady pro vypracování
A review of methods used for the calibration of piezoelectric film sensors
The selection of an appropriate method for the calibration of piezoelectric film sensors used for the measurement of the cavitation aggressiveness
The design of an experimental assembly for the realization the selected calibration method
The calibration of piezoelectric film sensors with the selected calibration method
Application of the sensors calibrated by the selected method to the measurement of the aggressiveness of an ultrasonic cavitation field
The critical evaluation of the results obtained by the selected calibration method
The recommendations for the application of the selected calibration method
Seznam doporučené literatury
KIM, Ki-Han, Georges CHAHINE, Jean-Pierre FRANC a Ayat KARIMI. Advanced experimental and numerical techniques for cavitation erosion prediction. Dordrecht: Springer, [2014]. Fluid mechanics and its applications, v. 106.
FRANC, Jean-Pierre a Jean-Marie MICHEL. Fundamentals of cavitation. Boston: Kluwer Academic Publishers, c2004. ISBN 1402022328.
BRENNEN, Christopher E. Cavitation and bubble dynamics. New York: Cambridge University Press, c2014. ISBN 978-1-107-64476-2.
SOYAMA, Hitoshi, MOMMA Takahiro, LICHTAROWICZ Andrzej and Edward WILLIAMS. A New Calibration Method for Dynamically Loaded Transducers and Its Application to Cavitation Impact Measurement. Journal of Fluids Engineering. 1998, 120(4). 10.1115/1.2820728.
Seznam doporučené literatury
KIM, Ki-Han, Georges CHAHINE, Jean-Pierre FRANC a Ayat KARIMI. Advanced experimental and numerical techniques for cavitation erosion prediction. Dordrecht: Springer, [2014]. Fluid mechanics and its applications, v. 106.
FRANC, Jean-Pierre a Jean-Marie MICHEL. Fundamentals of cavitation. Boston: Kluwer Academic Publishers, c2004. ISBN 1402022328.
BRENNEN, Christopher E. Cavitation and bubble dynamics. New York: Cambridge University Press, c2014. ISBN 978-1-107-64476-2.
SOYAMA, Hitoshi, MOMMA Takahiro, LICHTAROWICZ Andrzej and Edward WILLIAMS. A New Calibration Method for Dynamically Loaded Transducers and Its Application to Cavitation Impact Measurement. Journal of Fluids Engineering. 1998, 120(4). 10.1115/1.2820728.
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