Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Uncertainty Evaluation and Experimental Analysis for a Wind Tunnel as Reference to Gas Flare Flow Measurement
Submission Author:
Ligia Franco , ES
Co-Authors:
Ligia Franco, Rogerio Ramos, Marcio Coelho
Presenter: Ligia Franco
doi://10.26678/ABCM.ENCIT2018.CIT18-0041
Abstract
The wind tunnel of the Laboratory of Flow Machines at Federal University of Espirito Santo (UFES) is dedicated to the establishment of a turbulent and fully developed velocity profile. Its configuration provides experimental support in the evaluation of flare gas flow measurement technologies. As a reference flow meter, there is a standardized Pitot tube. In order to statistically define the behavior of the velocity profile inside the wind tunnel, experiments were carried out with the Pitot tube in several configurations. The experimental procedure is based in recommendations for Pitot installations in accordance to the standard ISO 3966 (2008), thus, aiming to enable a critic evaluation about the reliability of Pitot tube as the reference flow meter of this wind tunnel. The results indicate that the uncertainty of the measurement system is above the indicated by the standard, and the installation of a flow rectifier reduces the variability of the measurements and increase the symmetry of the velocity profile. Finally, it is proposed an experimental scenario that provides less variability of the measurement system using the Pitot Tube.
Keywords
Wind Tunnel, Pitot tube, flow measurement, uncertainty
