<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The article deals with experimental investigation of water cavitation in the convergent-divergent nozzle of rectangular cross-section. In practice, a quick and simple determination of cavitation is essential, especially if it is basic cavitation or cavitation generated additionally by the air being sucked. Air influences the formation, development and size of the cavity area in hydraulic elements. Removal or reduction of the cavity area is possible by structural changes of the element. In case of the cavitation with the suction air, it is necessary to find the source of the air and seal it. The pressure gradient, the flow, the oxygen content in the tank, and hence the air dissolved in the water, the air flow rate, the noise intensity and the vibration velocity on the nozzle wall were measured on laboratory equipment. From the selected measurements the frequency spectrum of the variation of the water flow of the cavity with cavitation without air saturation and with air saturation was compared and evaluated.</p></abstract>

The article deals with experimental investigation of water cavitation in the convergent-divergent nozzle of rectangular cross-section. In practice, a quick and simple determination of cavitation is essential, especially if it is basic cavitation or cavitation generated additionally by the air being sucked. Air influences the formation, development and size of the cavity area in hydraulic elements. Removal or reduction of the cavity area is possible by structural changes of the element. In case of the cavitation with the suction air, it is necessary to find the source of the air and seal it. The pressure gradient, the flow, the oxygen content in the tank, and hence the air dissolved in the water, the air flow rate, the noise intensity and the vibration velocity on the nozzle wall were measured on laboratory equipment. From the selected measurements the frequency spectrum of the variation of the water flow of the cavity with cavitation without air saturation and with air saturation was compared and evaluated.

Spectral Analysis of Pressure, Noise and Vibration Velocity Measurement in Cavitation

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The article deals with experimental investigation of water cavitation in the convergent-divergent nozzle of rectangular cross-section. In practice, a quick and...

Spectral Analysis of Pressure, Noise and Vibration Velocity Measurement in Cavitation

Published Online: Nov 22, 2017

Page range: 250 - 256

Received: Aug 19, 2017

Accepted: Aug 19, 2017

DOI: https://doi.org/10.1515/msr-2017-0030

Keywords
Cavitation, noise, vibration, spectral analysis, CFD

© by Jana Jablonská

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Spectral Analysis of Pressure, Noise and Vibration Velocity Measurement in Cavitation

Published Online: Nov 22, 2017

Page range: 250 - 256

Received: Aug 19, 2017

Accepted: Aug 19, 2017

DOI: https://doi.org/10.1515/msr-2017-0030

KeywordsCavitation, noise, vibration, spectral analysis, CFD

© by Jana Jablonská

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Cavitation, noise, vibration, spectral analysis, CFD