Drag coefficient of circular cylinder in axial flow of water for a wide range of length to diameter ratios

Tsugumasa Iiyama*, Masahiro Furuya, Takahiro Arai, Atsushi Ui, Riichiro Okawa, Kenetsu Shirakawa, Taro Shimada

*この研究の対応する著者

研究成果: Article査読

抄録

An experimental campaign was conducted to determine drag coefficients of circular cylinders in axial flow of water for a wide range of length-to-diameter ratios (L/D) from 2 to 35. Drag force acting on the circular cylinders was acquired at a velocity of 2 to 6 m/s, which corresponds to the Reynolds numbers of 2.2 × 105 to 7.0 × 105. The experimental data were validated by analysis using the commercial CFD code, Star-CCM+. The measured drag coefficients increased monotonically as the L/D increased with the range of Reynolds numbers, and were almost constant regardless of the Reynolds number. The drag coefficient was decomposed by the term of form drag and skin friction. As the value of L/D increased, the drag coefficient increased due to the skin friction drag term. The drag coefficient correlation was proposed as a function of L/D. The predicted values were consistent with both the experimental data and numerical simulation results. Furthermore, this correlation was applied to a fuel assembly with a channel box, it was shown that the drag coefficient can be predicted for a wide range of Reynolds numbers by specifying an appropriate form drag term.

本文言語English
ページ(範囲)1478-1486
ページ数9
ジャーナルJournal of Nuclear Science and Technology
59
12
DOI
出版ステータスPublished - 2022
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学

フィンガープリント

「Drag coefficient of circular cylinder in axial flow of water for a wide range of length to diameter ratios」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル