Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Flow rate measurement in flows with asymmetric velocity profiles by means of distributed thermal anemometry
Ist Teil von
Flow measurement and instrumentation, 2019-08, Vol.68, p.101570, Article 101570
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Flow rate in closed conduits is one of the most frequently measured parameters in industrial processes and in gas and water supply. For an accurate measurement, flow meters typically require a fully developed symmetric flow profile with preferably no radial or tangential velocity components. This is commonly secured by mounting flow meters in a pipe at a sufficiently long distance downstream any change in cross-section or pipe direction. In this paper, we introduce a new approach for flow rate measurement of gases or liquids that employs a novel spatially resolving fluid velocity sensor basing on thermal anemometry. The new principle allows accurate flow rate measurements for non-axisymmetric velocity profiles, even directly after pipe bends, T-junctions or other alterations in the pipe geometry. This is exemplified for air flow in three different pipe bend configurations.
•We developed a new principle for flow rate measurement in pipes with asymmetric flow profiles that.•The new device allows the measurement of flow rate directly downstream of pipe bends or other flow-disturbing installations.•A prototype sensor was used for validation and we found a deviation of the measured air flow rate that is <2%.