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Initial entrained fraction at onset of annular flow
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- Anglart, Henryk, 1954- (author)
- KTH,Kärnenergiteknik
- (creator_code:org_t)
- 2019
- 2019
- English.
- In: 18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 20192019. ; , s. 1023-1034
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- One of the frequently employed current models to predict the occurrence of dryout in boiling annular flows is using conservation equations to determine the liquid film mass flux. The accuracy of predictions of dryout depends to a large extend on the initial conditions, which are employed in the model. In this paper it is shown that the accuracy of predictions can be significantly improved if the initial entrained fraction of liquid is correlated to the flow conditions at the onset of annular flow. Using experimental data for liquid film flow rates in pipes with variable power distributions, a new closure relationship for the initial entrained fraction of liquid at the onset of annular flow is proposed.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
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- kon (subject category)
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