不等直径的多圆柱系统广泛应用于海洋工程中，为研究不等直径双圆柱之间的互扰效应。本文基于CFD方法，对不同间距比下的二维不等直径双圆柱进行了数值模拟。研究结果表明：当$T/D \leqslant {\text{3}}{\text{.0}}$时，双圆柱尾流涡相互融合，互扰效应造成斯特劳哈尔数偏低，升力系数幅值随时间变化不稳定；当$T/D > {\text{3}}{\text{.0}}$时，两圆柱互扰较弱，圆柱水动力系数与单圆柱结果相差不大；$T/D \approx {\text{3}}{\text{.0}}$可认为是临界间距比。本文成果有助于多圆柱流动控制技术研究。
The multiple cylinder systems have been dramatically applied in ocean engineering, in order to study the interaction effect between two cylinders with different diameters, the numerical simulation of two cylinders with different diameters under different pitch ratio is carried out based on the CFD method. The results show that: At $T/D \leqslant {\text{3}}{\text{.0}}$, the wake vortices of the two cylinders merged, and the Strouhal number is small due to the interaction effect, and the amplitude of lift coefficient is unstable with the increase of time. At $T/D > {\text{3}}{\text{.0}}$, the interaction is weak and the hydrodynamic coefficients are close to that of single cylinder. The $T/D \approx {\text{3}}{\text{.0}}$ is regarded as the critical spacing ratio. The results of present study are significant for investigation of flow control technique of multiple cylinders.
2021,43(5): 48-52 收稿日期：2020-06-29
DOI：10.3404/j.issn.1672-7649.2021.05.010
分类号：TV131
作者简介：张艺鸣(1998-)，男，本科，研究方向为海洋工程水动力学
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