Void diagnostics in liquid-filled pressure sensing lines

Kang Lin, Keith Holbert

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Air or gas entrapped in liquid-filled sensing lines can result in false pressure readings, sluggish response, and extraneous noise due to acoustic resonances. This work models the impact on the pressure system transfer function of voids inside sensing lines based on an equivalent pi circuit along with a lumped parameter void representation. Field test data from a fossil power plant are used to validate the simulation results. Two void indicators derived from resonant peak frequencies are also introduced to perform sensing line diagnostics.

Original languageEnglish (US)
Pages (from-to)503-511
Number of pages9
JournalProgress in Nuclear Energy
Issue number5
StatePublished - Jul 1 2010


  • Noise analysis
  • Power spectral density
  • Pressure sensing lines
  • Sensing line equivalent pi model
  • Transfer functions

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Waste Management and Disposal


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