Specificity of flow structure in a dual elbow and its visualization by PIV measurement

Kazuhiro Yoshida, Yuki Kazuhisa, Hidetoshi Hashizume, Saburo Toda

研究成果: Conference contribution

4 引用 (Scopus)

抜粋

A large number of pipe failures caused by wall thinning have been reported in nuclear power plants, some of which occur in a dual elbow or the vicinity of it. These pipe failures could be influenced by complex flow induced in the elbow. This study, therefore, aims at predicting the whole flow structure in the dual elbow as the first step by taking a secondary flow after the elbow by Ply measurement. A test section consists of two elbows that are 2-dimentionally connected with/without a straight pipe. They are made of acrylic resin. The diameter of thc elbow is 56mm and the curvature radius ratio is 1.5. Reynolds number in this experiment is 4x I It is confirmed that the flow structure in the dual elbow has specificity depending on the inlet flow condition to the elbow and that the secondary flow itself has swirling motion in a streamwise direction. The dual elbow seems to generate more complex and unstable flow field even when the flow field at the inlet of the elbow slightly changes from a fully developed flow. However, there is a strong possibility that putting a straight pipe between the two elbows makes it ease the occurrence of the complex flow field.

元の言語English
ホスト出版物のタイトル2008 Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16
ページ293-299
ページ数7
DOI
出版物ステータスPublished - 2008
イベント16th International Conference on Nuclear Engineering, ICONE16 2008 - Orlando, FL, United States
継続期間: 2008 5 112008 5 15

出版物シリーズ

名前International Conference on Nuclear Engineering, Proceedings, ICONE
3

Other

Other16th International Conference on Nuclear Engineering, ICONE16 2008
United States
Orlando, FL
期間08/5/1108/5/15

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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  • これを引用

    Yoshida, K., Kazuhisa, Y., Hashizume, H., & Toda, S. (2008). Specificity of flow structure in a dual elbow and its visualization by PIV measurement. : 2008 Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 (pp. 293-299). (International Conference on Nuclear Engineering, Proceedings, ICONE; 巻数 3). https://doi.org/10.1115/ICONE16-48231