An Improved Tubular Ultrasonic Radiator in Longitudinal and Radial Composite Vibration

2015 ◽  
Vol 101 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Long Xu ◽  
Shuyu Lin
Keyword(s):  
Ultrasonic Radiator

scholarly journals Radial vibration and ultrasonic field of a long tubular ultrasonic radiator

2013 ◽  
Vol 20 (5) ◽  
pp. 1161-1167 ◽  
Author(s):  
Lin Shuyu ◽  
Fu Zhiqiang ◽  
Zhang Xiaoli ◽  
Wang Yong ◽  
Hu Jing
Keyword(s):  
Ultrasonic Field ◽  
Radial Vibration ◽  
Ultrasonic Radiator

A piezoelectric microelectromechanical systems ultrasonic radiator.

2009 ◽  
Vol 126 (4) ◽  
pp. 2282
Author(s):  
Benjamin A. Griffin ◽  
Matthew D. Williams ◽  
Mark Sheplak
Keyword(s):  
Microelectromechanical Systems ◽  
Ultrasonic Radiator

Vibration analysis and sound field characteristics of a tubular ultrasonic radiator

Ultrasonics ◽  
2006 ◽  
Vol 45 (1-4) ◽  
pp. 146-151 ◽  
Author(s):  
Zhaofeng Liang ◽  
Guangping Zhou ◽  
Yihui Zhang ◽  
Zhengzhong Li ◽  
Shuyu Lin
Keyword(s):  
Vibration Analysis ◽  
Sound Field ◽  
Ultrasonic Radiator

High Power Ultrasonic Radiator in Liquid

2011 ◽  
Vol 97 (4) ◽  
pp. 544-552 ◽  
Author(s):  
Shuyu Lin ◽  
Tian Hua ◽  
Jing Hu ◽  
Wenxv Hu ◽  
Zhiqiang Fu ◽  
...  
Keyword(s):  
High Power ◽  
Ultrasonic Radiator ◽  
Power Ultrasonic

Summation of high-frequency Langevin transducers vibrations for increasing of ultrasonic radiator power

Ultrasonics ◽  
2021 ◽  
Vol 114 ◽  
pp. 106413
Author(s):  
Vladimir Nikolaevich Khmelev ◽  
Andrey Victorovich Shalunov ◽  
Viktor Aleksandrovich Nesterov
Keyword(s):  
High Frequency ◽  
Ultrasonic Radiator

Appearance of Non-Equilibrium α-Aluminum Grains in Hypereutectic Al-Si Alloy through Sono-Solidification

2010 ◽  
Vol 638-642 ◽  
pp. 362-367 ◽  
Author(s):  
Yoshiki Tsunekawa ◽  
Kanako Taga ◽  
Yuta Fukui ◽  
Masahiro Okumiya
Keyword(s):  
Molten Metal ◽  
Silicon Content ◽  
Eutectic Temperature ◽  
Eutectic Reaction ◽  
Acoustic Streaming ◽  
Eutectic Point ◽  
Primary Silicon ◽  
Ultrasonic Radiator ◽  
Equilibrium Phases ◽  
Non Equilibrium

Ultrasonic vibration has been applied to various molten metal processes owing to the functions of (a) improvement in wettability, (b) liquid adhesion at a vibrating end surface and (c) sono-solidification such as grain refinement. The present study is focused on the sono-solidification with acoustic cavitaion in hypereutectic Al-18mass%Si alloy. There appears an equilibrium microstructure composed of primary silicon and coupled eutectic -Al/Si phases in Al-18mass%Si alloy, however, non-equilibrium -Al grains develop along with the equilibrium phases through the sono-solidification. During the sono-solidification of Al-18mass%Si alloy, non-equilibrium -Al grains are recognized in the molten metal close to the ultrasonic radiator just before reaching the eutectic temperature of 577 oC in addition to the refined primary silicon particles. The appearance of -Al grains is understood through acoustic cavitation: ultrasound in molten Al-Si alloys exhibits two outstanding behaviors of cavitation bubbling and acoustic streaming. Firstly the de-coupled eutectic reaction, which is recognized in the solidified eutectic Al-Si alloy with severe stirring, causes divorced -Al grains by the acoustic streaming with cavitation. Secondly it is expected that high pressure of over 1 GPa generated by the collapse of cavitaion babbles leads to not only an increase in the eutectic temperature, but also higher silicon content at the eutectic point in Al-Si alloy. Consequently, non-equilibrium -Al grains are nucleated at collapsed cavitaion bubble sites, and they are characterized by higher silicon content compared with that of primary -Al grains in hypoeutectic Al-7masst%Si alloy.

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