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Research Article

Analysis of flow speed distribution in the acoustic streaming generated by two piston sources

두 개의 피스톤음원으로부터 발생된 음향유동의 유속분포 해석

Jungsoon Kim1
,
Jihee Jung2
,
Moojoon Kim3∗
김 정순1
,
정 지희2
,
김 무준3∗
1Department of Electrical Engineering, Tongmyong University
2General Utility Co. Ltd., Korea
3Department of Physics, Pukyong National University
∗Corresponding Author
30 September 2020. pp. 400-405
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Abstract

To analyze the flow distribution formed by multiple acoustic sources, the distribution of acoustic streaming speed caused by an ultrasonic transducer composed of two identical piezoelectric vibrators was examined for various angles between the sound sources. In order to measure the distribution of the speed along the acoustic axis of the transducer, a simple measurement method using a droplet indicator having density similar to that of water is suggested. The simulation results calculated by a numerical method and experimental results showed a similar tendency, and the change of flow speed distribution with the intersection angle between acoustic beams radiated from two acoustic sources was analyzed.

Keywords
Acoustic streaming
Ultrasonic transducer
Multiple acoustic sources
Flow speed distribution
Electroacoustic conversion efficiency

복수의 음향유동에 의해 형성되는 유속의 분포를 해석하기 위하여 동일한 두 개의 압전진동자로 구성된 초음파 트랜스듀서에 의해 형성되는 음향유동에 대해 음원 사이의 각도에 따른 음향유동속도의 분포를 조사하였다. 거리에 따른 유체입자속도의 분포를 측정하기 위하여 물과 동일한 밀도를 갖는 표시액을 사용한 간단한 측정방법을 제안하였다. 수치해석적인 방법으로 시뮬레이션한 결과와 실험결과는 유사한 경향을 나타내었으며, 두 음원으로부터 방사된 평면파의 방사빔이 교차하는 각도에 따른 음향유동의 속도 분포의 변화를 해석할 수 있었다.

키워드
음향유동
초음파트랜스듀서
다중음원
유속분포
전기음향변환효율
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 39
  • No :5
  • Pages :400-405
  • Received Date : 2020-06-21
  • Revised Date : 2020-08-04
  • Accepted Date : 2020-08-07
  • DOI :https://doi.org/10.7776/ASK.2020.39.5.400
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