A method is described that allows the correction of the reading of a flow meter that is exposed to pipe flow disturbed by installations upstream of the meter. The method is aimed at minimizing the distance between installation and meter and is based on characterizing the flow by “fundamental” disturbances, physically interpretable as vortical structures, and on the detection of these disturbances by a measuring device located slightly upstream of the meter. A functional relationship between fundamental disturbances and “error shift” of the meter is postulated, and its existence is demonstrated by a number of experiments. It is concluded that the correction method is applicable to any type of installation and flow meter.
Issue Section:
Technical Papers
1.
Laws
, E. M.
, 1990
, “Flow Conditioning—A New Development
,” Flow Measurement and Instrumentation
, 1
, pp. 165
–170
.2.
Kalku¨hler, K., 1998, “Experimente Zur Entwicklung Der Geschwindigkeitsprofile Und Turbulenzgro¨ssen Hinter Verschiedenen Gleichrichtern,” Dissertation, Universita¨t Essen; also available as Fortschritt-Bericht VDI, Reihe 7, Nr. 339, VDI-Verlag, Du¨sseldorf.
3.
Mattingly
, G. E.
, and Yeh
, T. T.
, 1994
, “Pipeflow Downstream of a Reducer and Its Effect on Flowmeters
,” Flow Measurement and Instrumentation
, 5
, pp. 181
–187
.4.
Reader-Harris
, M. J.
, Sattary
, J. A.
, and Spearman
, E. P.
, 1995
, “The Orifice Plate Discharge Coefficient Equation—Further Work
,” Flow Measurement and Instrumentation
, 6
, pp. 101
–114
.5.
Gersten, K., and Klika, M., 1998, “The Decay of Three-Dimensional Deviations From the Fully Developed State in Laminar Pipe Flow,” Advances in Fluid Mechanics and Turbomachinery, H. J. Rath and C. Egbers, eds., Springer-Verlag, Heidelberg, pp. 17–28.
6.
Gersten, K., and Papenfuss, H. D., 2001, “The Decay of Three-Dimensional Deviations From the Fully Developed State in Turbulent Pipe Flow,” submitted to J. Fluid Mech.
7.
Mattingly
, G. E.
, and Yeh
, T. T.
, 1991
, “Effects of Pipe Elbows and Tube Bundles on Selected Types of Flow Meters
,” Flow Measurement and Instrumentation
, 2
, pp. 4
–13
.8.
Mickan
, B.
, Wendt
, G.
, Kramer
, R.
, and Dopheide
, D.
, 1996
, “Systematic Investigation of Pipe Flows and Installation Effects Using Laser Doppler Anemometry. Part II: The Effect of Disturbed Flow Profiles on Turbine Gas Meters—A Describing Empirical Model
,” Flow Measurement and Instrumentation
, 7
, pp. 151
–160
.9.
Wildemann, C., Merzkirch, W., and Gersten, K., 1998, “Characterization and Correction of Installation Effects by Measuring Wall Shear Stress in Pipe Flow,” Proceedings FLOMEKO 1998, Lund, Sweden, pp. 333–334.
10.
Wildemann, C., Merzkirch, W., and Gersten, K., 1999, “A Systematic Approach for Correcting the Reading of a Flow Meter in Disturbed Pipe Flow,” Proceedings 4th Int. Symposium on Fluid Flow Measurement, Denver, CO, USA.
11.
Wildemann, C., 2000, “Ein System Zur Automatischen Korrektur Der Messabweichungen Von Durchflussmessgera¨ten Bei Gesto¨rter Anstro¨mung,” Dissertation, Universita¨t Essen; also available as Fortschritt-Bericht VDI, Reihe 8, Nr. 868, VDI-Verlag, Du¨sseldorf, 2001.
12.
Schlu¨ter
, Th.
, and Merzkirch
, W.
, 1996
, “PIV Measurements of the Time-Averaged Flow Velocity Downstream of Flow Conditioners in a Pipeline
,” Flow Measurement and Instrumentation
, 7
, pp. 173
–179
.13.
Dengel, P., Fernholz, H. H., and Hess, M., 1987, “Skin-Friction Measurements in Two-and Three-Dimensional Highly Turbulent Flows With Separation,” Advances in Turbulence, G. Comte-Bellot, J. Mathieu, eds., Springer-Verlag, Heidelberg, pp. 470–479.
14.
Nitsche, W., 1994, Stro¨mungsmesstechnik, Springer-Verlag, Berlin.
15.
Mattingly, G. E., 1983, “Volume Flow Measurements,” Fluid Mechanics Measurements, R. J. Goldstein, ed., Hemisphere, Washington, D.C., pp. 245–306.
16.
Baker, R. C., 2000), Flow Measurement Handbook, Cambridge University Press.
17.
Gersten, K., Merzkirch, W., and Wildemann, C., 2001, “Verfahren Und Vorrichtung Zur Korrektur Fehlerhafter Messwerte Von Durchflussmessgera¨ten Infolge Gesto¨rter Zustro¨mung,” Patent no. 197 24 116.
Copyright © 2002
by ASME
You do not currently have access to this content.
