Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-18T19:01:27.160Z Has data issue: false hasContentIssue false
  • English
  • Français

Measurement of fluid turbulence based on pulsed ultrasound techniques. Part 2. Experimental investigation

Published online by Cambridge University Press:  20 April 2006

Joseph L. Garbini ,
Fred K. Forster  and
Jens E. Jorgensen
Joseph L. Garbini
Affiliation:
Department of Mechanical Engineering, University of Washington, Seattle, U.S.A.
Fred K. Forster
Affiliation:
Department of Mechanical Engineering, University of Washington, Seattle, U.S.A.
Jens E. Jorgensen
Affiliation:
Department of Mechanical Engineering, University of Washington, Seattle, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

An extensive experimental programme in both laminar and turbulent flow was undertaken to examine the validity of all of the major implications of the model of the pulsed ultrasonic Doppler velocimeter for turbulent flow developed in part 1 of this investigation. The turbulence measurements were made in fully developed flow at the centre of a 6·28 cm diameter pipe. The Reynolds number of the flow ranged from 6000 to 40000. The carrier frequency of the ultrasonic velocimeter was 4·7 MHz.

Measurements of the turbulence intensity and of the one-dimensional velocity spectra made with the ultrasonic velocimeter are compared with the analysis and with the actual quantities as measured by a hot-film anemometer. The experimental results are in agreement with theoretical predictions.

Measurements of one-dimensional turbulence spectra with reduced ambiguity spectra made by the two sample volume methods described in part 1 are presented. The results verify the analysis and indicate that an improvement in the useful dynamic range of the velocity power spectrum of nearly three orders of magnitude can realistically be achieved.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 118 , May 1982 , pp. 471 - 505
Copyright
© 1982 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Angelsen, B. A. J. & Kristoffersen, K. 1979 On ultrasonic MTI measurement of velocity profiles in blood flow. I.E.E.E. Trans. Biomed. Engng BME 26, 665–671.
Bendat, B. S. & Piersol, A. G. 1971 Random Data: Analysis and Measurement Procedures. Wiley.
Bourke, P. J., Pulling, D. T., Gill, L. E. & Denton, W. H. 1968 The measurement of turbulent velocity fluctuations and turbulent temperature fluctuations in the supercritical region by a hot-wire anemometer and a cold wire resistance thermometer. In Proc. Symp. Heat Transfer and Fluid Dynamics of Near Critical Fluids, paper 9. Inst. Mech. Engrs, London.
Garbini, J. L. 1978 Measurement of fluid turbulence based on pulsed ultrasound techniques. Ph.D. dissertation. Dept Mech. Engng, Univ. Washington, Seattle.
Garbini, J. L., Forster, F. K. & Jorgensen, J. E. 1982 Measurement of fluid turbulence based on pulsed ultrasound techniques. Part 1. Analysis. J. Fluid Mech. 118, 445–470.Google Scholar
George, W. K. & Lumley, J. L. 1973 The laser-Doppler velocimeter and its application to the measurement of turbulence. J. Fluid Mech. 60, 321–363.Google Scholar
Goldstein, R. J. & Kried, D. K. 1968 Fluid velocity measurement from the Doppler shift of scattered laser radiation. Heat Transfer Lab., Dept Mech. Engng, Univ. Minnesota, Minneapolis, Rep. no. 85.Google Scholar
Jenkins, G. M. & Watts, D. G. 1968 Spectral Analysis and its Applications. Holden-Day.
Koopmans, L. H. 1974 The Spectral Analysis of Time Series. Academic.
Laufer, J. 1954 The structure of turbulence in fully-developed pipe flow. NACA Rep. no. 1174.Google Scholar
Lawn, C. J. 1971 The determination of the rate of dissipation in turbulent pipe flow. J. Fluid Mech. 48, 477–505.Google Scholar
Monin, A. S. & Yaglom, A. M. 1975 Statistical Fluid Mechanics: Mechanics of Turbulence, vol. 2. MIT Press.
Oppenheim, A. V. & Schafer, R. W. 1975 Digital Signal Processing. Prentice-Hall.
Pennel, W. T., Sparrow, W. M. & Eckert, E. R. G. 1972 Turbulence intensity and time-mean velocity distributions in low Reynolds number turbulent pipe flows. Int. J. Heat Mass Transfer 15, 1067–1074.Google Scholar
Pike, E. B., Jackson, P. J. & Page, D. I. 1968 Measurement of turbulent velocities from the Doppler shift in scattered laser radiation. Sci. Instrum. 1, 727–730.Google Scholar
Rabiner, L. R. & Schafer, R. W. 1974a Comparison of some IIR and FIR digital filters. Bell Syst. Tech. J. 53, 305–331.Google Scholar
Rabiner, L. R. & Schafer, R. W. 1974b On the behavior of minimax relative error FIR digital differentiators. Bell Syst. Tech. J. 53, 363–390.Google Scholar
Rabiner, L. R. & Schafer, R. W. 1974c On the behavior of minimax FIR digital Hilbert transoformers. Bell Syst. Tech. J. 53, 363–390.Google Scholar
Resch, F. & Coantic, M. 1969 A study of hot-wire and hot-film anemometers in water. Houille Blanche 2, 151–161.Google Scholar
Rice, S. O. 1949 Statistical properties of a sine wave plus random noise. Bell Syst. Tech. J. 27, 109–157.Google Scholar
Sandborn, V. A. 1954 Experimental evaluation of momentum terms in turbulent pipe flow. NACA Tech. Note no. 3266.Google Scholar