Explanation for the frequency shift pattern of nonuniform blocked pipeline systems from an energy perspective

T. C. Che, H. F. Duan, B. Pan, P. J. Lee, M. S. Ghidaoui

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


It was found in a previous study that the transient frequency shifts induced by nonuniform blockages in water pipelines become less evident as the frequency increases, but its physical mechanism is unclear. This paper explains this non-uniform blockage induced frequency shift pattern from an energy perspective. The results indicate that the non-uniform blockages have a less blocking effect on the propagation of high frequency waves; thus, the induced frequency shifts become less evident. In practical applications of non-uniform blockage detection, the frequency of the incident wave should be selected carefully to ensure that the reflected wave contains enough energy.

Original languageEnglish
Title of host publication13th International Conference on Pressure Surges
PublisherBHR Group Limited
Number of pages15
ISBN (Electronic)9780000000002
Publication statusPublished - 1 Jan 2018
Event13th International Conference on Pressure Surges - Bordeaux, France
Duration: 14 Nov 201816 Nov 2018

Publication series

Name13th International Conference on Pressure Surges


Conference13th International Conference on Pressure Surges


  • Energy transmission coefficient
  • Frequency shift
  • Non-uniform blockage
  • Transfer matrix
  • Transient
  • Water pipeline

ASJC Scopus subject areas

  • Water Science and Technology

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