Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Measurement of the Fluid Viscosity by Using the Torsional Vibration of a Circular Rod

원형 봉의 비틀림 진동에 의한 유체 점도 측정 연구

  • 전한용 (숭실대학교 공과대학 기계공학과) ;
  • 김진오 (숭실대학교 대학원 기계공학과)
  • Published : 2002.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper deals with the measurement of the fluid viscosity by using the torsional vibration of a circular rod excited by a torsional vibrator at one end. The effect of an adjacent viscous fluid on the torsional vibration of the rod has been studied theoretically and expressed in terms of the mechanical impedance. The theoretically-obtained trend that the mechanical impedance is proportional to the square root of the viscosity times the density of the fluid has been confirmed by the impedance measurement. The paper demonstrates that a torsionally-vibrating rod can be used as a sensor to measure the viscosity of a fluid.

Keywords

References

  1. 김진오, 전한용, 2000, '봉의 비틀림 고유진동에 대한 인접 점성유체의 영향,' 한국소음진동공학회지, 제10권, 제1호, pp. 168-173
  2. Kim, J. O., Wang, Y., Bau, H. H., 1991, 'The Effect of an Adjacent Viscous Fluid on the Transmission of Torsional Stress Waves in a Submerged Waveguide,' Journal of the Acoustical Society of America, Vol. 89, No.3, pp. 1414-1422 https://doi.org/10.1121/1.400541
  3. 김진오, 1999, '초음파 점도계용 고체 매질의 탄성파와 인접 점성유체 간의 상호작용,' 한국음향학회지, 제18권, 제5호, pp. 28-34
  4. Bau, H. H., Kim, J. O., Lynnworth, L. C., Nguyen, T. H., 1990, 'Torsional Wave Fluid Sensor and System,' United States Patent 4,893,496
  5. 谷澤, 公彦, 坂本, 泰弘, 1995, '？り振動ラソヅュハソ型超音波粘度計,' 超音波TECHNO, 2月？, pp. 23-17
  6. Achenbach, J. D., 1975, Wave Propagation in Elastic Solids, North-Holland Publishing Co., Amsterdam, p. 241, p. 24
  7. Fox, R. W., McDonald, A. T., 1998, Introduction to Fluid Mechanics, 5th ed., John Wiley & Sons, New York, p. 709
  8. Wolfram, S., 1988, Mathematica-A System for Doing Mathematics by Computer, Addison-Wesley, New York
  9. Nayfeh, A. H., 1981, Introduction to Perturbation Techniques, John Wiley & Sons, New York
  10. 전한용, 2000, '봉의 비틀림 진동에 대한 인접 점성유체의 영향,' 숭실대학교 석사학위논문, 제3장
  11. Yih, C.-S., 1979, Fluid Mechanics, West River Press, Michigan, pp. 321 - 324
  12. 권오수, 김진오, 2001, '랑주방형 압전 비틀림 변환기의 진동특성,' 대한기계학회논문집(A), 제25권, 제8호, pp. 1197-1205
  13. 한국공업표준협회, 1993, '점도계 교정용 표준액,' 한국산업규격KS A 5103
  14. American Society for Testing and Materials, 1993, 'Viscosity-Temperature Charts for Liquid Petroleum Products,' Annual Book of ASTM Standards, D 341-89