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On post-dryout heat...
On post-dryout heat transfer in channels with flow obstacles
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- Anghel, Ionut (author)
- KTH,Reaktorteknologi
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- Anglart, Henryk (author)
- KTH,Reaktorteknologi
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(creator_code:org_t)
- Elsevier BV, 2014
- 2014
- English.
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In: Nuclear Engineering and Design. - : Elsevier BV. - 0029-5493 .- 1872-759X. ; 270, s. 351-358
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- This paper describes a new approach to predict post-dryout heat transfer in channels with flow obstacles. Using experimental data obtained in annular test sections at prototypical BWR conditions, the existing Saha correlation for post-dryout heat transfer has been modified to account for the presence of obstacles. The obstacle effect is taken into account in the following way: (a) the critical quality downstream of an obstacle is found; (b) an exponential function of equilibrium quality is applied to describe the decrease of heat transfer coefficient in the developing post-dryout region; (c) an additional heat transfer enhancement term is applied downstream of the obstacle. The new approach is applied to annular test sections with various flow obstacles and a significant improvement of accuracy of wall temperature prediction, as compared to reference methods, is shown.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Critical quality
- Flow obstacles
- Heat Transfer enhancement
- In-channels
- New approaches
- Reference method
- Test sections
- Wall temperatures
Publication and Content Type
- ref (subject category)
- art (subject category)
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