TITLE:
Experimental and Numerical Evaluation and Optimization of a Non Standard Pitot/Sampling Probe
AUTHORS:
Andrea Shmueli, Tor Erling Unander, Ole Jørgen Nydal
KEYWORDS:
Isokinetic Probe; Pitot Tube; CFD; Flow; Installation Effects
JOURNAL NAME:
Engineering,
Vol.5 No.12,
November
26,
2013
ABSTRACT: An isokinetic sampling probe is designed and constructed
to measure entrained liquid droplet fluxes in separated gasliquid
pipe flows. This probe also has the capability of working as a non-standard
Pitot tube when the sampling is stopped. CFD simulations using the commercial
software Ansys CFX were carried out for single phase gas flow to analyze the
non-standard design. Pitot tube velocity calculations and isokinetic sampling
conditions were studied. The predicted results were compared
against theoretical velocity profiles from the literature and with gas single
phase experimental data acquired in a horizontal 49 m long steel pipeline
with an internal diameter of 69 mm. The experiments were done by using
a dense gas (SF6) at 7 bara. An asymmetry of the experimental velocity profiles
reproduced with the numerical simulations. The CFD simulations made it possible
to verify the design and predict and correct an installation problem.