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Influence of Pipe Roughness on the Performance of Ultrasonic Meters for Flow Rate Measurement

[+] Author Affiliations
Alcir de Faro Orlando

Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil

Ana Luisa Ferreira

Petrobras Transporte S.A. - Transpetro, Rio de Janeiro, RJ, Brazil

José Alberto Pinheiro

Petrobras S.A., Rio de Janeiro, RJ, Brazil

Paper No. IMECE2011-65210, pp. 757-765; 9 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5492-1
  • Copyright © 2011 by ASME


Ultrasonic flow meters have been recently used for flow rate measurement because they are a non-intrusive device and have the capability of making diagnostics of their performance and flow field distortion between two consecutive calibrations. The available completely developed flow velocity profiles in the literature is discussed in this paper and integrated along the meter ultrasonic path to simulate its performance. It was shown that for Reynolds number up to 1,000,000 and relatively roughness values smaller than ε = 0.00012 the flow is in the hydraulically smooth regime. Also, it was shown that the ratio between the area velocity and the average path velocity (kh ) decreases close to centerline and increases close to the wall, when roughness increases.

Copyright © 2011 by ASME



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