Discrete Blockage Detection in Pipelines Using the Frequency Response Diagram: Numerical Study
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 5
Abstract
This paper proposes the use of fluid transients as a noninvasive technique for locating blockages in transmission pipelines. By extracting the behavior of the system in the form of a frequency response diagram, discrete blockages within the pipeline were shown to induce an oscillatory pattern on the peaks of this response diagram. This pattern can be related to the location and size of the blockage. A simple analytical expression that can be used to detect, locate, and size discrete blockages is presented, and is shown able to cater for multiple blockages existing simultaneously within the system. The structure of the expression suggests that the proposed technique can be extended to situations where system parameters may not be known to a high accuracy and also to more complex network scenarios, although future studies may be required to verify these possibilities.
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References
Chaudhry, M. H. (1987). Applied hydraulic transients, Van Nostrand Reinhold, New York.
Covas, D., Ramos, H., Brunone, B., and Young, A. (2004). “Leak detection in water trunk mains using transient pressure signals: Field tests in Scottish water.” 9th Int. Conf. on Pressure Surges, BHR Group, Chester, U.K., 185–198.
De Salis, M. H. F., and Oldham, D. J. (2001). “The development of a rapid single spectrum method for determining the blockage characteristics of a finite length duct.” J. Sound Vib., 243(4), 625–640.
Lee, P., Vítkovský, J., Lambert, M., Simpson, A., and Liggett, J. (2005). “Frequency domain analysis for detecting pipeline leaks.” J. Hydraul. Eng., 131(7), 596–604.
Lee, P. J., and Vítkovský, J. P. (2006). “Discussion of ‘Detection of partial blockage in single pipelines by P. K. Mohapatra, M. H. Chaudhry, A. A. Kassem, and J. Moloo.’” J. Hydraul. Eng., accepted.
Lee, P. J., Vítkovský, J. P., Lambert, M. F., Simpson, A. R., and Liggett, J. A. (2003a). “Frequency response coding for the location of leaks in single pipeline systems.” Int. Conf. on Pumps, Electromechanical Devices and Systems Applied to Urban Water Management, International Association of Hydraulic Research (IAHR) and International Water Association (IWA), Valencia, Spain.
Lee, P. J., Vítkovský, J. P., Lambert, M. F., Simpson, A. R., and Liggett, J. (2003b). “Discussion of ‘Leak detection in pipes by frequency response method using a step excitation by Witness Mpesha, M. H. Hanif Chaudhry, and Sarah L. Gassman.’” J. Hydraul. Res., 40(1), 2003, pp. 55–62.
Lee, P. J., Vítkovský, J. P., Lambert, M. F., Simpson, A. R., and Liggett, J. A. (2004). “Experimental validation of frequency response coding for the location of leaks in single pipeline systems.” The Practical Application of Surge Analysis for Design and Operation, 9th Int. Conf. on Pressure Surges, BHR Group, Chester, U.K., 239–253.
Lynn, P. (1982). An introduction to the analysis and processing of signals, Macmillan, London.
Mermelstein, P. (1967). “Determination of the vocal-tract shape from measured format frequencies.” J. Acoust. Soc. Am., 41(5), 1283–1294.
Mohapatra, P. K., Chaudhry, M. H., Kassem, A. A., and Moloo, J. (2006). “Detection of partial blockage in single pipelines.” J. Hydraul. Eng., 132(2), 200–206.
Schroeder, M. R. (1967). “Determination of the geometry of the human vocal tract by acoustic measurements.” J. Acoust. Soc. Am., 41, 1002–1010.
Stephens, M., Simpson, A. R., Lambert, M. F., and Vítkovský, J. P. (2005). “Field measurements of unsteady friction effects in a trunk transmission pipeline.” 7th Annual Symp. on Water Distribution Systems Analysis, ASCE, Anchorage, Alaska.
Stoianov, I., Maksimovic, C., Graham, N., and Dellow, D. (2003). “Field validation of the application of hydraulic transients for leak detection in transmission pipelines.” Advances in Water Supply Management, Computing and Control for Water Industry (CCWI) ’03, London, 86–97.
Vítkovský, J. P., Bergant, A., Lambert, M. F., and Simpson, A. R. (2003). “Unsteady friction weighting function determination from transient responses.” Pumps, electromechanical devices and systems applied to urban water management, E. Cabrera and E. Cabrera, Jr., eds., Vol. II, Valencia, Spain, 781–789.
Wang, X.-J., Lambert, M. F., and Simpson, A. R. (2005). “Detection and location of a partial blockage in a pipeline 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.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 5 • May 2008
Pages: 658 - 663
Copyright
© 2008 ASCE.
History
Received: Dec 2, 2003
Accepted: Mar 12, 2007
Published online: May 1, 2008
Published in print: May 2008
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