System Response Function–Based Leak Detection in Viscoelastic Pipelines
Publication: Journal of Hydraulic Engineering
Volume 138, Issue 2
Abstract
The possibility of leak detection in a viscoelastic pipe system is studied. The frequency response function method (FRFM) is used for leak detection, and the analytical expression for the FRFM originally developed for an elastic pipeline is extended to the viscoelastic situation in this study. The extended FRFM is validated from numerical experiments with one-dimensional viscoelastic transient models. The analysis shows that the pipe-wall viscoelasticity effect has significant impact on the amplitude damping and phase shift of the pressure wave, but little influence on the leak-induced patterns of pressure head peaks in transient system frequency responses. The results indicate that the extended FRFM is applicable to the viscoelastic situation. The impact of viscoelastic parameters and incident wave bandwidth on the applicability of the extended FRFM i also investigated in this paper, and the results imply that transient input signals with rapid changes in time are preferable for leak location in viscoelastic pipelines.
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Acknowledgments
This research work was partially supported by Hong Kong Research Grant Council (HKRGC) Project Nos. UNSPECIFIED620706 and UNSPECIFIED612908.
References
Aklonis, J. J., and MacKnight, W. J. (1983). Introduction to polymer visco-elasticity, 2nd Ed., Wiley, New York.
Brunone, B. (1999). “Transient test-based technique for leak detection in outfall pipes.” J. Water Resour. Plann. Manage., 125(5), 302–306.
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, 2nd Ed., Van Nostrand Reinhold, New York.
Cheong, L. C. (1991). “Unaccounted for water and the economics of leak detection.” Proc. 18th Int. Water Supply Congr. Exhib., Copenhagen, 123(8), 709–718.
Colombo, A. F., Lee, P. J., and Karney, B. W. (2009). “A selective literature review of transient-based leak detection methods.” J. Hydro-environ. Res., 2(4), 212–227.
Covas, D., and Ramos, H. (2010). “Case studies of leak detection and location in water pipe systems by inverse transient analysis.” J. Water Resour. Plann. Manage., 136(2), 248–257.
Covas, D., Ramos, H., and Almeida, A. B. (2005a). “Standing wave difference method for leak detection in pipeline systems.” J. Hydraul. Eng., 131(12), 1106–1116.
Covas, D., Stoianov, I., Mano, J., Ramos, H., Graham, N., and Maksimovic, C. (2004). “The dynamic effect of pipe-wall visco-elasticity in hydraulic transients. Part 1: Experimental analysis and creep characterization.” J. Hydraul. Res., 42(5), 517–532.
Covas, D., Stoianov, I., Mano, J., Ramos, H., Graham, N., and Maksimovic, C. (2005b). “The dynamic effect of pipe-wall visco-elasticity in hydraulic transients. 2: Model development, calibration and verification.” J. Hydraul. Res., 43(1), 56–70.
Duan, H. F., Lee, P. J., Ghidaoui, M. S., and Tung, Y. K. (2010). “Essential system response information for transient-based leak detection methods.”J. Hydraul. Res., 48(5), 650–657.
Ferrante, M., and Brunone, B. (2003). “Pipe system diagnosis and leak detection by unsteady-state tests. 1. Harmonic analysis.” Adv. Water Resour., 26(1), 95–105.
Franke, P. G., and Seyler, F. (1983). “Computation of unsteady pipe flow with respect to visco-elastic material properties.” J. Hydraul. Res., 21(5), 345–353.
Kreyszig, E. (1993). Advanced engineering mathematics, 7th Ed., Wiley, New York.
Lee, P. J. (2005). “Using system response functions of liquid pipelines for leak and blockage detection.” Ph.D. dissertation, Univ. of Adelaide, Adelaide, SA, Australia.
Lee, P. J., Lambert, M. F., Simpson, A. R., Vítkovský, J. P., and Liggett, J. (2006). “Experimental verification of the frequency response method for pipeline leak detection.” J. Hydraul. Res., 44(5), 693–707.
Lee, P. J., Vítkovský, J. P., Lambert, M. F., Simpson, A. R., and Liggett, J. (2007). “Leak location in pipelines using the impulse response function.” J. Hydraul. Res., 45(5), 643–652.
Liggett, J. A., and Chen, L. C. (1994). “Inverse transient analysis in pipe networks.” J. Hydraul. Eng., 120(8), 934–954.
Liou, J. C. (1998). “Pipeline leak detection by impulse response extraction.” J. Fluids Eng., 120(4), 833–838.
Nixon, W., Ghidaoui, M. S., and Kolyshkin, A. A. (2006). “Range of validity of the transient damping leakage detection method.” J. Hydraul. Eng., 132(9), 944–957.
Pezzinga, G., and Scandura, P. (1995). “Unsteady flow in installation with polymeric additional pipe.” J. Hydraul. Eng., 121(11), 802–811.
Ramos, H., Covas, D., and Borga, A. (2004). “Surge damping analysis in pipe systems: Modelling and experiments.” J. Hydraul. Res., 42(4), 413–425.
Sattar, A. M., and Chaudhry, M. H. (2008). “Leak detection in pipelines by frequency response method.” J. Hydraul. Res., 46(EI1), 138–151.
Suo, L., and Wylie, E. B. (1990). “Complex wavespeed and hydraulic transients in viscoelastic pipes.” J. Fluids Eng., 112(4), 496–500.
Vítkovský, J. P., Simpson, A. R., and Lambert, M. F. (2000). “Leak detection and calibration using transients and genetic algorithms.” J. Water Resour. Plann. Manage., 126(4), 262–265.
Wang, X. J., Lambert, M. F., Simpson, A. R., Liggett, J. A., and Vítkovský, J. P. (2002). “Leak detection in pipeline systems using the damping of fluid transients.” J. Hydraul. Eng., 128(7), 697–711.
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Published In
Journal of Hydraulic Engineering
Volume 138 • Issue 2 • February 2012
Pages: 143 - 153
Copyright
© 2012 American Society of Civil Engineers.
History
Received: May 6, 2010
Accepted: Jul 22, 2011
Published online: Jul 25, 2011
Published in print: Feb 1, 2012
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