REPEATABILITY OF LASER-DOPPLER VELOCIMETRY EXPERIMENTS FOR INDUSTRIAL PIPE-FLOW ANALYSIS

Denis F. Hinz

Abstract

We study the repeatability of laser-Doppler velocimetry experiments for pipe-flow analysis. For single-point velocity measurements, we find repeatability standard deviations of approximately 0.5 % in the core region whereas measurements close to the wall are de-facto unrepeatable. We discuss how repeatability data may be used to verify uncertainty budgets and how it could be included in revised uncertainty budgets in view of established guidelines such as GUM and ISO 21748.

Keywords

Laser-Doppler velocimetry, turbulent pipe-flow, repeatability, uncertainty, statistical error, GUM, ISO 21748

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IMEKO-WC-2015-TC9-218.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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