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In-situ measurements of stock flow conditions in the twin-wire forming zone
KTH, Skolan för teknikvetenskap (SCI), Mekanik.ORCID-id: 0000-0003-3737-0091
2018 (Engelska)Ingår i: Paper Conference and Trade Show, PaperCon 2018, TAPPI Press , 2018, s. 59-72Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

In the present study, we report results from in-situ investigations of the forming process performed in the roll-blade section of a pilot machine. Direct measurements of the drainage pressure along the forming zone were obtained using a miniature fibre-optic pressure transducer inserted into the flow through the headbox jet. High-speed imaging of tracer particles using a transmitted light setup was performed to in an attempt to obtain direct measurements of the local stock speed. By replacing one section of a ceramic blade with a quartz glass piece, access was also obtained to the region on top of the blade. The combined picture that emerges from these measurements is that the pressure distribution and the velocity field along a twin-wire forming zone is significantly more complex than usually assumed, and that much remains to be understood about the dynamics of twin-wire forming.

Ort, förlag, år, upplaga, sidor
TAPPI Press , 2018. s. 59-72
Nyckelord [en]
Commerce, Velocity, Wire forming machines, Direct measurement, High speed imaging, In-situ investigations, In-situ measurement, Tracer particle, Transmitted light, Twin wire forming, Velocity field, Wire
Nationell ämneskategori
Teknisk mekanik
Identifikatorer
URN: urn:nbn:se:kth:diva-247431Scopus ID: 2-s2.0-85060372651ISBN: 9781510871892 (tryckt)OAI: oai:DiVA.org:kth-247431DiVA, id: diva2:1304926
Konferens
TAPPI Paper Conference and Trade Show, PaperCon 2018, 15 April 2018 through 18 April 2018
Anmärkning

QC20190415

Tillgänglig från: 2019-04-15 Skapad: 2019-04-15 Senast uppdaterad: 2019-04-15Bibliografiskt granskad

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Söderberg, Daniel

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