利用风力助推转子辅助推进在实际工程中广泛应用，但以往的研究多局限于低雷诺数和单圆柱的范畴。本文基于重叠网格技术研究亚临界雷诺数范围内串列双圆柱体绕流，寻找合适的转速比实现航行器辅助推进。研究结果表明，旋转圆柱体产生的横向力可以为航行器提供辅助动力。然而转速比较大时，上下游圆柱产生的横向力差距变大，这对航行器的航向稳定性不利。要消除这种不利的影响，下游圆柱体需要更大的转速比才能平衡这个扭矩。随着转速比的增加，旋转圆柱体的尾涡由交替脱落转变为无明显的漩涡脱落，上游圆柱体对下游圆柱体的影响逐渐削弱。
Wind-assisted rotor is widely applied in practical engineering, but previous studies mostly focus on low Reynolds number and single cylinder. In this paper, flow past two cylinders in tandem arrangement at subcritical Reynolds number is studied based on the overlapping grid technique, in order to find the optimal velocity ratio to realize the auxiliary propulsion of the vehicle. The results show that the lateral force generated by the rotating cylinder can provide auxiliary power for the vehicle. However, when the rotational speed is relatively large, the difference of the transverse force between the upstream and downstream cylinders is pronounce, which is detrimental to the heading stability of the vehicle. To eliminate this adverse effect, the downstream cylinders need a larger rotational speed ratio to balance this torque. With the increase of the velocity ratio, the wake structure of the rotating cylinder switches from alternating shedding to no obvious vortex shedding, and the influence of the upstream cylinder on the downstream cylinder is gradually weakened.
2024,46(3): 50-55 收稿日期：2023-02-06
DOI：10.3404/j.issn.1672-7649.2024.03.009
分类号：U661.1
作者简介：胡泰安(1995-),男,硕士,工程师,研究方向为舰船总体设计
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