余洋, 杨光照, 侯国祥. 限制边界内变截面串列双方柱绕流研究[J]. 中国舰船研究, 2024, 19(X): 1–9. DOI: 10.19693/j.issn.1673-3185.03813
引用本文: 余洋, 杨光照, 侯国祥. 限制边界内变截面串列双方柱绕流研究[J]. 中国舰船研究, 2024, 19(X): 1–9. DOI: 10.19693/j.issn.1673-3185.03813
YU Y, , . Research on the flow past variable sized tandem square cylinders in constrained boundaries[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–9 (in Chinese). DOI: 10.19693/j.issn.1673-3185.03813
Citation: YU Y, , . Research on the flow past variable sized tandem square cylinders in constrained boundaries[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–9 (in Chinese). DOI: 10.19693/j.issn.1673-3185.03813

限制边界内变截面串列双方柱绕流研究

Research on the flow past variable sized tandem square cylinders in constrained boundaries

  • 摘要:
    目的 针对限制边界内的串列双方柱绕流,研究雷诺数为100时,变截面双方柱(边长比为1.5)绕流在不同间距比下对流场、阻力的影响规律。
    方法 基于格子Boltzmann方法以及反弹格式对限制边界内的串列双方柱绕流流场进行数值模拟,对比不同的间距比下变截面和等截面双方柱的流场模式和阻力系数。
    结果 结果表明,在相同的间距比下,变截面在一定程度上可以加速流场模式的改变,但在间距比为6时反而将延缓流场模式的改变;相较于单方柱绕流,变截面的减阻效果最高可达9.16%,而等截面最高可达7.76%;相较于等截面,在相同间距比下的变截面最高可以减阻67.79%,即变截面的减阻效果更好,所以变截面是实现流场控制、减阻的可选方案。
    结论 研究结果可为限制边界内方柱绕流的阻力优化、流场控制提供参考。

     

    Abstract:
    Objectives The influence of the variable sized tandem square cylinders(with a side length ratio of 1.5)on the flow field and drag force of cylinders was researched for the flow past tandem square cylinders in a constrained boundary under different gap ratios at a Reynolds number of 100.
    Methods Based on the lattice Boltzmann method with the bounce-back boundary condition, comparisons of the effect of equal and variable sized tandem cylinders were made under different gap ratios.
    Results The results indicate that variable sized cylinders could accelerate the change of the flow field pattern to a certain extent. However, variable sized tandem cylinders could delay the change of the flow pattern at a gap ratio of 6. In addition, variable sized tandem cylinders, could achieve at most 9.16% reduction in resistance compared with the flow past a single square cylinder. However, the equal sized tandem cylinders could achieve 7.76% at most. On the other hand, compared with the equal sized tandem cylinders, variable sized tandem cylinders could achieve 67.79% reduction in resistance. Variable sized tandem cylinders could obtain better reduction in drag force, so it is a feasible way to achieve flow control and drag reduction.
    Conclusions The results in current paper can be served as a basic guidance for the optimization of drag and flow control for the flow past square cylinders in constrained boundaries.

     

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