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A study on steam-water two phase flow distribution in a rectangular channel with different channel orientations
KTH. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnkraftssäkerhet.
2018 (engelsk)Inngår i: Experimental Thermal and Fluid Science, ISSN 0894-1777, E-ISSN 1879-2286, Vol. 99, s. 219-232Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Experimental study on steam-water two phase vertical and inclined upward flow (15–90°) was performed in a rectangular channel with cross section of 17 mm × 10 mm under atmospheric pressure to investigate the phase distribution and the average void fraction in the cross section which were obtained from the local void fraction measurement by a conductivity probe. The inlet superficial velocities of the steam and water varied from 0.72 to 3.85 m/s and from 0.11 to 0.3 m/s respectively. A high speed camera was used to identify the flow patterns. Experimental results show that the phase distribution curves are significantly affected by channel orientation and the average void fraction first decreases and then increases with the increase of orientation. Based on the drift-flux model, two parameters, namely, the distribution parameter (C0) and the drift velocity (Ugm) have been studied in detail. Both the distribution parameter and the drift velocity are found to be functions of orientation. The distribution parameter decreases with the increase of orientation while the drift velocity first increases and then decreases with the increase of orientation., Based on the experimental data, an improved drift-flux model is proposed especially for the slug and churn flow, which predicts the void fraction in an inclined channel with good accuracy.

sted, utgiver, år, opplag, sider
Elsevier Inc. , 2018. Vol. 99, s. 219-232
Emneord [en]
Distribution parameter, Drift velocity, Orientation, Rectangular channel, Void fraction, Atmospheric pressure, Crystal orientation, High speed cameras, Steam, Velocity, Average void fraction, Channel orientations, Distribution parameters, Drift velocities, Local void fraction, Steam water two phase flow, Superficial velocity, Two phase flow
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Identifikatorer
URN: urn:nbn:se:kth:diva-236570DOI: 10.1016/j.expthermflusci.2018.07.022ISI: 000446146600019Scopus ID: 2-s2.0-85051040996OAI: oai:DiVA.org:kth-236570DiVA, id: diva2:1266049
Merknad

Export Date: 22 October 2018; Article; CODEN: ETFSE; Correspondence Address: Gong, S.; School of Nuclear Science and Engineering, Shanghai Jiao Tong UniversityChina; email: gsj@sjtu.edu.cn; Funding details: 51306112, NSFC, National Natural Science Foundation of China; Funding text: This work was supported by the National Natural Science Foundation of China (Grant No. 51306112 ). QC 20181127

Tilgjengelig fra: 2018-11-27 Laget: 2018-11-27 Sist oppdatert: 2018-11-27bibliografisk kontrollert

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