Open this publication in new window or tab >>2019 (English)In: Flow Measurement and Instrumentation, ISSN 0955-5986, E-ISSN 1873-6998, Vol. 69, article id 101604Article in journal (Refereed) Published
Abstract [en]
The pressure-time method is classified as a primary method for measuring discharge in hydraulic machinery. The uncertainty in the discharge determined using the pressure-time method is typically around ±1.5 %; however, despite dating back almost one hundred years in time, there still exists potential to reduce this uncertainty. In this paper, an improvement of the pressure-time method is suggested by implementing a novel formulation to model the frictional losses arising in the evaluation procedure. By analyzing previously obtained data from CFD, laboratory and full-scale pressure-time measurements it is shown that the new friction model improves the accuracy of the flow rate calculation by approximately 0.1–0.2% points, compared to currently utilized friction models. Despite being a small absolute improvement, the new friction model presents an important development of the pressure-time method because the relative improvement is significant.
Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Pressure-time method, Transient friction modeling, Pipe flow
National Category
Fluid Mechanics
Research subject
Fluid Mechanics
Identifiers
urn:nbn:se:ltu:diva-75599 (URN)10.1016/j.flowmeasinst.2019.101604 (DOI)000496341600005 ()2-s2.0-85070506497 (Scopus ID)
Note
Validerad;2019;Nivå 2;2019-08-20 (svasva)
2019-08-202019-08-202025-02-09Bibliographically approved