Acoustic wave propagation in high-pressure system.

Area of Science:

• Fluid Dynamics
• Acoustics
• Materials Science

Background:

• Pulsating water jets offer higher cutting efficiency than continuous jets due to increased impact pressure (water-hammer pressure).
• Acoustic wave generation is a key method for producing these pulsating jets.
• Understanding acoustic wave propagation in high-pressure systems is crucial for effective jet generation.

Purpose of the Study:

• To present research results on acoustic wave propagation in high-pressure systems.
• To determine the dependence of sound speed and second kinematical viscosity on operating pressure for numerical simulation.
• To enable effective generation of pulsating jets at greater distances from the acoustic source.

Main Methods:

• Development and laboratory testing of a pulsating jet generation method using acoustic transducers.
• Measurement of acoustic wave propagation in a high-pressure system.
• Determination of sound speed and second kinematical viscosity using modal analysis of a liquid-filled tube's response to impact, measured by pressure sensors.

Main Results:

• Experimental data showed good agreement with the UNESCO equation for sound speed in water.
• The second kinematical viscosity of water was found to be dependent on operating pressure.
• Acoustic wave propagation characteristics were determined for high-pressure water systems.

Conclusions:

• The developed method effectively transmits acoustic waves for pulsating jet generation.
• Accurate determination of water properties (sound speed, viscosity) is essential for simulating and optimizing acoustic wave propagation.
• Further research can enhance the effectiveness of pulsating water jets in various applications.