Upload
dennis-sawyer
View
213
Download
1
Embed Size (px)
Citation preview
©Cleaning Technologies Group
Sound . . .Sound . . .Sound Is Vibration Transmitted Through an Elastic Material
UltraSound . . .UltraSound . . .Sound at a Higher Frequency
Sound
UltraSound
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
Think of the black line above as the edge view of a metal plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
Now Imagine an “Ultrasonic Transducer” Attached to the Metal Plate
Ultrasonic Transducer
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
Ultrasonic Transducer
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Sound is Created by a Source of Vibration
The Ultrasonic Transducer Vibrates and Transmits Vibration to the Metal Plate
©Cleaning Technologies Group
Now Imagine that the Metal Plate is the Bottom of a Vessel or “Tank”
©Cleaning Technologies Group
Now Imagine that the Metal Plate is the Bottom of a Vessel or “Tank”
©Cleaning Technologies Group
And that the Tank is Filled with Liquid
©Cleaning Technologies Group
And that the Tank is Filled with Liquid
©Cleaning Technologies Group
Now Let’s Re-Start the Vibration
©Cleaning Technologies Group
Now Let’s Re-Start the Vibration
©Cleaning Technologies Group
Now Let’s Re-Start the Vibration
©Cleaning Technologies Group
Now Let’s Re-Start the Vibration
©Cleaning Technologies Group
Now Let’s Re-Start the Vibration
©Cleaning Technologies Group
Now Let’s Re-Start the Vibration
©Cleaning Technologies Group
As the tank bottom raises, it pushes against the liquid thereby
compressing it. The blue represents an area of “compression”.
©Cleaning Technologies Group
The “compression” continues to travel through the liquid away from the source of vibration.
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
As the tank bottom lowers it “pulls” on the liquid creating an area of negative pressure
or “rarefaction”
©Cleaning Technologies Group
Continued vibration generates areas of
compression and rarefaction radiating through the liquid
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
©Cleaning Technologies Group
+- 0
Now add a pressure gauge to measure pressure at a given point in the liquid
©Cleaning Technologies Group
+- 0
As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure
©Cleaning Technologies Group
+- 0
As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure
©Cleaning Technologies Group
+- 0
As the rarefactions and compressions of the sound waves pass by, the gauge sees alternating negative and positive pressure
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
A vibrating source transmits sound waves to a liquid.
Sound waves, consisting of areas of rarefaction (negative pressure) and compression (positive pressure), radiate through the liquid away from the source of vibration.
©Cleaning Technologies Group
+- 0
Imagine now a small defect in the liquid consisting of a bubble or speck of dirt
.
©Cleaning Technologies Group
.+- 0
The a “cavitation bubble” starts to grow around the defect under influence of negative pressure
©Cleaning Technologies Group
+- 0
Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
©Cleaning Technologies Group
+- 0
Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
©Cleaning Technologies Group
+- 0
Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
©Cleaning Technologies Group
+- 0
Growth of the “cavitation bubble” continues and
accelerates under increasingly negative pressure
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
The “cavitation bubble” shrinks under the influence of growing
positive pressure
+- 0
©Cleaning Technologies Group
+- 0
©Cleaning Technologies Group
+- 0
The catastrophic collapse of the cavitation bubble under
increasing pressure results in implosion!
©Cleaning Technologies Group
+- 0
The high energy resulting from the implosion of millions of
cavitation bubbles do the work associated with ultrasonics
©Cleaning Technologies Group
©Cleaning Technologies Group