ADV Measurements of Turbulence: Can We Improve Their Interpretation?
Publication: Journal of Hydraulic Engineering
Volume 124, Issue 6
Abstract
A simple technique to reduce the Doppler noise influence on measurements of turbulence using the Acoustic Doppler Velocimeter (ADV) is developed, and basic relationships to estimate turbulence characteristics using information about the Doppler noise are derived. The procedure involves, firstly, measurement of instantaneous velocities in the flow under consideration; secondly, measurement of the Doppler noise components in still water taken from the flow investigated (with the same velocity range setting that was used in turbulence measurements); and thirdly, estimation of turbulence characteristics using both sets of measurements and relationships developed in the paper. The technique was tested for three typical environments (water storage basin with silty water, laboratory flume with water containing seeding material of neutrally buoyant hollow glass spheres with a mean size around 8–10 μm, and outdoor flume with natural water containing air bubbles and organic particles). It was shown that the Doppler noise can change the measured turbulence characteristics significantly, even for high-level turbulence flows.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bouckaert, F., and Davis, J.(1996). “Flow regimes and macroinvertebrate distributions associated with stream boulders (isolated roughness elements).”Bull. North Am. Benthological Soc., 13(1), 166.
2.
Brunk, B., Weber-Shirk, M., Jensen, A., Jirka, G., and Lion, L. W.(1996). “Modeling natural hydrodynamic systems with a differential-turbulence column.”J. Hydr. Engrg., ASCE, 122(7), 373–380.
3.
Gammish, R. A., and Friedrichs, C. T. (1996). “Acoustic Doppler technology added to benthic boundary layer tetrapod for marine environmental quality study.”EOS, Trans., AGU, 76(3), OS77.
4.
Kraus, N. C., Lohrmann, A., and Cabrera, R.(1994). “New acoustic meter for measuring 3D laboratory flows.”J. Hydr. Engrg., ASCE, 120(3), 406–412.
5.
Lhermitte, R., and Serafin, R.(1984). “Pulse-to-pulse coherent Doppler sonar signal processing techniques.”J. Atmospheric and Oceanic Technol., 1(4), 293–308.
6.
Lohrmann, A., Cabrera, R., and Kraus, N. C. (1994). “Acoustic Doppler velocimeter (ADV) for laboratory use.”Proc., Symp. on Fundamentals and Advancements in Hydr. Measurements and Experimentation, C. A. Pugh, ed., ASCE, 351–365.
7.
Nikora, V. I., and Goring, D. G. (1996). “A simple technique to avoid the Doppler noise influence on turbulence measurements by ADV.”NIWA, Christchurch Miscellaneous Rep., No. 308, NIWA, Christchurch, New Zealand.
8.
Nikora, V. I., Goring, D. G., and Biggs, B. J. F. (1996a). “On stream periphyton-turbulence interactions.”NIWA Christchurch Miscellaneous Rep. No. 297, NIWA, Christchurch, New Zealand.
9.
Nikora, V. I., Suren, A. M., Biggs, B. J. F., and Brown, S. L. R. (1996b). “Flow structure around moss mat Fissidens Rigidulus in a gravel-bed stream: an experimental study.”NIWA Christchurch Miscellaneous Rep. No. 298, NIWA, Christchurch, New Zealand.
10.
Zedel, L., Hay, A. E., Cabrera, R., and Lohrmann, A.(1996). “Performance of a single-beam pulse-to-pulse coherent Doppler profiler.”IEEE J. of Oceanic Engrg., 21(3), 290–297.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 124 • Issue 6 • June 1998
Pages: 630 - 634
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Jun 1, 1998
Published in print: Jun 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.