Numerical simulation of flow around two staggered three-dimensional wavy conical cylinders

ZOU Lin; LIU Jian; WU Weinan; YAN Yulong; WEI Yiying

doi:10.11918/202107056

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Numerical simulation of flow around two staggered three-dimensional wavy conical cylinders

更新时间：2026-10-22

- Numerical simulation of flow around two staggered three-dimensional wavy conical cylinders
- Vol. 54, Issue 1, Pages: 163-170(2022)
- 作者机构：
  
  武汉理工大学机电工程学院,武汉,430000
- 作者简介：
- 基金信息：
- DOI：10.11918/202107056
  CLC： TU311
- Published：2022
- 稿件说明：
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ZOU Lin, LIU Jian, WU Weinan, et al. Numerical simulation of flow around two staggered three-dimensional wavy conical cylinders[J]. 2022, 54(1): 163-170.
DOI：

ZOU Lin, LIU Jian, WU Weinan, et al. Numerical simulation of flow around two staggered three-dimensional wavy conical cylinders[J]. 2022, 54(1): 163-170. DOI： 10.11918/202107056.

摘要

利用大涡模拟分析了雷诺数Re=3 900下间距比为L/Dm=4和5、交错角为α=0~15°的错列双波浪锥柱升阻力特性、流场结构及尾迹干涉效应。研究发现:对于特定间距比L/Dm=4、5

下游波浪锥柱脉动升力系数得到显著提高

在α=10°时较单直圆柱分别提升20.1倍和21.4倍

这主要是由上游波浪锥柱尾涡卷起撞击在下游波浪锥柱的一侧

下游波浪锥柱表面产生周期性的耦合力导致；受上游波浪锥柱两个自由端及其侧面来流与下游波浪柱作用产生的回流区的影响

下游波浪锥柱时均阻力系数显著降低。随着交错角增加

对于间距比L/Dm=4、5

下游波浪锥柱时均阻力系数逐渐接近上游柱

且在α=10°时

时均阻力系数较单圆柱分别降低34.9%和18.8%。涡量图展示了错列双波浪锥柱之间的完全撞击状态

侧面撞击状态和尾流干扰状态；且由于波浪锥柱表面形状的影响

使得流经波浪锥柱后方的尾涡存在明显分层现象

侧面撞击状态相对于其他两种状态能提供更大的脉动升力系数。本文研究结果可为风力俘能结构列阵的布局提供理论支持。

Abstract

In this paper

the lifting and drag characteristics

flow field structure and wake interference effects of two staggered wavy conical cylinders with center-to-center pitch ratios of L/Dm=4 and 5 and staggered angles of α=0~15° at Reynolds number 3900 are studied by large eddy simulation. The results show that the trailing vortex of the upstream wavy conical cylinder curls up and impacts on the side of the downstream wavy conical cylinder

which causes periodic coupling force on the surface of the downstream wavy conical cylinder

resulting in the increase of the fluctuating lift coefficient. At α=10° the fluctuating lift coefficient is 20.1 times and 21.4 times higher than that of single straight cylinder

respectively. Under the influence of two free ends of the upstream wavy conical cylinder and the backflow area generated by the interaction between the upstream wavy conical cylinder and the downstream wavy conical cylinder

the time-average drag coefficient of the downstream wavy conical cylinder is significantly reduced

and with the increase of the staggered angle

the time-average drag coefficient of the downstream wavy conical cylinder gradually approaches that of the upstream wavy conical cylinder. At α=10°

the time-average drag coefficient is 34.9% and 18.8% lower than that of a single cylinder

respectively. The flow around the staggered double wavy conical cylinders shows the flow structures of complete impact

side impact and wake disturbance et al. Because of the shape of the wavy conical cylinder

the flow field passing through the wavy conical cylinder presents strong three-dimensional characteristics

and the trailing vortex has obvious stratification

and the side impact condition provides a larger fluctuating lift coefficient than the other two. The results in this paper can provide theory support for the array layout of wind floating structure.

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