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ファイル | 記述 | サイズ | フォーマット | |
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j.net.2016.06.007.pdf | 5.1 MB | Adobe PDF | 見る/開く |
タイトル: | Bubbly, Slug, and Annular Two-Phase Flow in Tight-Lattice Subchannels |
著者: | Prasser, Horst-Michael Bolesch, Christian Cramer, Kerstin Ito, Daisuke https://orcid.org/0000-0003-0067-0525 (unconfirmed) Papadopoulos, Petros Saxena, Abhishek Zboray, Robert |
著者名の別形: | 伊藤, 大介 |
キーワード: | Computational Fluid Dynamics Subchannel Flow Tight Fuel Rod Lattice TomographyTwo-Phase Flow Void Fraction |
発行日: | Aug-2016 |
出版者: | Elsevier BV |
誌名: | Nuclear Engineering and Technology |
巻: | 48 |
号: | 4 |
開始ページ: | 847 |
終了ページ: | 858 |
抄録: | An overview is given on the work of the Laboratory of Nuclear Energy Systems at ETH, Zurich (ETHZ) and of the Laboratory of Thermal Hydraulics at Paul Scherrer Institute (PSI), Switzerland on tight-lattice bundles. Two-phase flow in subchannels of a tight triangular lattice was studied experimentally and by computational fluid dynamics simulations. Two adiabatic facilities were used: (1) a vertical channel modeling a pair of neighboring subchannels; and (2) an arrangement of four subchannels with one subchannel in the center. The first geometry was equipped with two electrical film sensors placed on opposing rod surfaces forming the subchannel gap. They recorded 2D liquid film thickness distributions on a domain of 16 × 64 measuring points each, with a time resolution of 10 kHz. In the bubbly and slug flow regime, information on the bubble size, shape, and velocity and the residual liquid film thickness underneath the bubbles were obtained. The second channel was investigated using cold neutron tomography, which allowed the measurement of average liquid film profiles showing the effect of spacer grids with vanes. The results were reproduced by large eddy simulation + volume of fluid. In the outlook, a novel nonadiabatic subchannel experiment is introduced that can be driven to steady-state dryout. A refrigerant is heated by a heavy water circuit, which allows the application of cold neutron tomography. |
著作権等: | © 2016, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
URI: | http://hdl.handle.net/2433/227131 |
DOI(出版社版): | 10.1016/j.net.2016.06.007 |
出現コレクション: | 学術雑誌掲載論文等 |
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