Measurement Techniques

, Volume 61, Issue 4, pp 365–372 | Cite as

Method for Determining Defects on the Inner Walls of Tubing from the Velocity Distribution of the Flowing Fluid

  • V. V. DavydovEmail author
  • S. V. Kruzhalov
  • N. M. Grebenikova
  • K. Ya. Smirnov

The flow structure of a liquid medium in tubing with a circular cross section is investigated. A method has been developed for determining the defects of the inner walls of tubing using laser radiation scattered on particles of the flowing fluid. The results of determining the fluid flow velocity profile in the tubing cross section along the length of this tubing are presented. A new technique is proposed for measuring the point coordinates describing the location of the defect in terms of the length and inner diameter of the tubing.


laser radiation fluid flow velocity liquid medium flow photodetector Doppler frequency shift spectrum defect 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • V. V. Davydov
    • 1
    • 3
    Email author
  • S. V. Kruzhalov
    • 1
  • N. M. Grebenikova
    • 1
  • K. Ya. Smirnov
    • 2
  1. 1.Peter the Great St. Petersburg Polytechnic UniversitySt. PetersburgRussia
  2. 2.Bonch-Bruevich St. Petersburg State University of TelecommunicationsSt. PetersburgRussia
  3. 3.All-Russia Research Institute of Plant PathologyBolshye VyaziomyRussia

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