Partial Blockage Detection in Pipelines by Frequency Response Method
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 1
Abstract
A new technique is presented utilizing the frequency response for the detection of partial blockages in a pipeline. In the system frequency response, a partial blockage increases the amplitude of the pressure oscillations at even harmonics. Such an increase in amplitude has an oscillatory pattern, the frequency and amplitude of which may be used to predict the location and size of a partial blockage. In this technique, the pressure transient history at only one location is sufficient, and the history of the transient in the pipe prior to blockage is not needed, which is an advantage over a number of other available techniques, in addition to being simpler to use. It is shown that the technique successfully detects the location of a blockage in a number of simple systems with blockage size as small as 10%. The technique is verified by comparing the computed results with those computed by the method of characteristics and with measurements from simple laboratory setups. A number of practical issues and limitations for field implementations are discussed.
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Acknowledgments
The writers would like to thank Dr John Dickerson, Department of Civil and Environmental Engineering, University of South Carolina, for his valuable help in preparing the experimental setup for the frequency response extraction process.
References
Adewumi, M. A., Eltohami, E. S., and Ahmed, W. H. (2000). “Pressure transients across constrictions.” J. Energy Resour. Technol., 122, 34–41.
Brunone, B., and Ferrante, M. (2001). “Detecting leaks in pressurized pipes by means of transients.” J. Hydraul. Res., 39(5), 539–547.
Chaudhry, M. H. (1987). Applied hydraulic transients, Van Nostrand Reinhold, New York.
Covas, D., Ramos, H., and de Almeida, A. B. (2005). “Standing wave difference method for leak detection in pipeline systems.” J. Hydraul. Eng., 131(12), 1106–1116.
De Salis, M. H. F., and Oldham, D. J. (1999). “Determination of the blockage area function of a finite duct from a single pressure response measurement.” J. Sound Vib., 221(1), 180–186.
Ferrante, M., and Brunone, B. (2003). “Pipe system diagnosis and leak detection by unsteady-state tests: Harmonic analysis.” Adv. Water Resour., 26, 95–105.
Hunt, A. (1996). “Fluid properties determine flow line blockage potential.” Oil & Gas Journal, 94(29), 62–66.
Jiang, Y., Chen, H., and Li, J. (1996). “Leakage and blockage detection in water network of district heating system.” ASHRAE Trans., 102(1), 291–296.
Lee, P. J., Vitkovsky, J. P., Lambert, M. F., Simpson, A. R., and Liggett, J. A. (2005a). “Frequency domain analysis for detecting pipeline leaks.” J. Hydraul. Eng., 131(7), 596–604.
Lee, P. J., Vítkovský, J. P., Lambert, M. F., Simpson, A. R., and Liggett, J. A. (2005b). “Leak location using the pattern of the frequency response diagram in pipelines: A numerical study.” J. Sound Vib., 284(3), 1051–1073.
Liou, C. P. (1998). “Pipelines leak detection by impulse response extraction.” J. Fluids Eng., 120, 833–838.
McInnis, D., and Karney, B. W. (1995). “Transients in distribution networks: Field tests and demand models.” J. Hydraul. Eng., 121(3), 218–231.
Mohapatra, P. K., Chaudhry, M. H., Kassem, A. A., and Moloo, J. (2006a). “Detection of partial blockage in single pipelines.” J. Hydraul. Eng., 132(2), 200–206.
Mohapatra, P. K., Chaudhry, M. H., Kassem, A. A., and Moloo, J. (2006b). “Detection of partial blockages in a branched piping system by the frequency response method.” J. Fluids Eng., 128(5), 1106–1114.
Osterwalder, J., and Wirth, C. (1985). “Experimental investigations of discharge behavior of crack-like fractures in pipes.” J. Hydraul. Res., 23(3), 255–272.
Qunli, W. (1994). “Reconstruction of blockage in a duct from single spectrum.” Appl. Acoust., 41(3), 229–236.
Qunli, W., and Fricke, F. (1989). “Estimation of blockage dimensions in a duct using measured Eigen frequency shifts.” J. Sound Vib., 133(2), 289–301.
Scott, S. L., and Satterwhitee, L. A. (1998). “Evaluation of the back pressure technique for blockage detection in gas flowlines.” J. Energy Resour. Technol., 120, 27–31.
Scott, S. L., and Yi, J. (1999). “Flow testing methods to detect and characterize partial blockages in looped subsea flowliness.” J. Energy Resour. Technol., 121, 154–160.
Vardy, A. E., and Brown, J. M. (1996). “On turbulent, unsteady, smooth-pipe friction.” 7th Int. Conf. on Pressure Surges and Fluid Transients in Pipelines and Open Channels, BHR Group, Harrogate, England, 289–311.
Vitkovsky, J. P., Bergant, A., Simpson, A. R., and Lambert, M. F. (2003). “Steady oscillatory flow solution including unsteady friction.” Int. Conf. Pumps, Electromechanical Devices, and Systems Applied to Urban Water Management, IAHR, IHR, and BHR Group, Granfield, U.K.
Wang, X. J., Lambert, M. F., and Simpson, A. R. (2005). “Detection and location of a partial blockage in pipeline systems using damping of fluid transients.” J. Water Resour. Plann. Manage., 131(3), 244–249.
Wylie, E. B., and Streeter, V. L. (1993). Fluid transients in systems, Prentice-Hall, Englewood Cliffs, N.J.
Zielke, W. (1968). “Frequency-dependent friction in transient pipe flow.” J. Basic Eng., 90(1), 109–115.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 1 • January 2008
Pages: 76 - 89
Copyright
© 2008 ASCE.
History
Received: Feb 10, 2006
Accepted: Jul 23, 2007
Published online: Jan 1, 2008
Published in print: Jan 2008
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