用于串列海豹胡须柱尾迹流场分析的降阶模型方法

袁咏祎; 朱剑月; 方存与; 杨志刚

doi:10.7652/xjtuxb202511016

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用于串列海豹胡须柱尾迹流场分析的降阶模型方法

更新时间：2025-11-11

- 用于串列海豹胡须柱尾迹流场分析的降阶模型方法
- A Reduced-Order Modelling Approach for Wake Flow Field Analysis of Tandem Seal-Vibrissa-Shaped Cylinders
- 西安交通大学学报 2025年59卷第11期页码：164-176
- 作者机构：
- 作者简介：
  
  作者简介：袁咏祎（1999—），女，博士生；
  朱剑月（通信作者），男，副教授，博士生导师。
- 基金信息：
  
  国家自然科学基金资助项目(52232013;51875411);上海市地面交通工具空气动力与热环境模拟重点实验室资助项目(23DZ2229029)
- DOI：10.7652/xjtuxb202511016
  中图分类号： O353
- 收稿：2025-02-13，
  
  纸质出版：2025-11-10
- 稿件说明：
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袁咏祎, 朱剑月, 方存与, 等. 用于串列海豹胡须柱尾迹流场分析的降阶模型方法[J]. 西安交通大学学报, 2025,59(11):164-176.

YUAN Yongyi, ZHU Jianyue, FANG Cunyu, et al. A Reduced-Order Modelling Approach for Wake Flow Field Analysis of Tandem Seal-Vibrissa-Shaped Cylinders[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 164-176.
袁咏祎, 朱剑月, 方存与, 等. 用于串列海豹胡须柱尾迹流场分析的降阶模型方法[J]. 西安交通大学学报, 2025,59(11):164-176. DOI： 10.7652/xjtuxb202511016.

YUAN Yongyi, ZHU Jianyue, FANG Cunyu, et al. A Reduced-Order Modelling Approach for Wake Flow Field Analysis of Tandem Seal-Vibrissa-Shaped Cylinders[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 164-176. DOI： 10.7652/xjtuxb202511016.

摘要

针对高雷诺数下串列海豹胡须柱杆件周围流场的高维特性导致流动结构识别困难的问题，采用谱本征正交分解（SPOD）和基于聚类分析（CROM）的降阶模型方法，通过数值仿真对其尾迹流场进行降阶分析，采用模态分解与流场重构得到简化流场，识别其主要流动特征，并与具有相同特征长度的串列圆柱以及串列椭圆柱杆件周围流场进行对比。结果表明：串列圆柱和串列椭圆柱尾迹中均存在能量占比较高的卡门涡街拟序结构，主导着尾迹流场的发展与输运；串列海豹胡须柱工况中各杆件上、下鞍面形成反相涡脱落结构，上、下游杆件尾迹内未出现大尺度拟序结构，模态分解中未出现能量占比较高的相干结构，涡脱落不规则，涡旋波动强度减弱，尾迹稳定性增强；不同于串列圆柱的单一方向循环回路，串列海豹胡须柱流场中形成了从主回路发散出的次级回路，上、下游杆件之间涡脱落存在同相与反相的相互转换，尾迹振荡得到有效抑制。该研究结果可为串列海豹胡须柱杆件应用于工程领域气动减阻和气动噪声控制提供参考。

Abstract

To address the difficulty in identifying flow structures caused by the high-dimensional characteristics of the flow field around tandem seal-vibrissa-shaped cylinders at high Reynolds numbers

a reduced-order modeling approach combining spectral proper orthogonal decomposition (SPOD) and cluster-based reduced-order modeling (CROM) is employed for reduced-order analysis of the wake flow field through numerical simulations. Modal decomposition and flow field reconstruction are performed to obtain simplified flow fields and identify dominant flow features

with comparisons made against flow fields around tandem circular cylinders and tandem elliptical cylinders of identical characteristic lengths. Results demonstrate that both tandem circular and elliptical cylinder wakes exhibit high-energy Kármán vortex street coherent structures that dominate wake development and transport. In contrast

the tandem seal-vibrissashaped cylinders exhibit anti-phase vortex shedding structures formed on the upper and lower saddle surfaces of each cylinder. No large-scale coherent structures emerge in the wakes of upstream and downstream cylinders

and modal decomposition reveals no dominant high-energy coherent structures. The vortex shedding appears irregular

with weakened vortex fluctuation intensity and enhanced wake stability. Unlike the unidirectional circulation loop observed in tandem circular cylinders

the flow field around tandem seal-vibrissa-shaped cylinders develops secondary loops diverging from the primary circulation. The vortex shedding between upstream and downstream cylinders undergoes in-phase and anti-phase transitions

effectively suppressing wake oscillations. These findings provide insights for engineering applications of tandem sealvibrissa-shaped cylinders in aerodynamic drag reduction and noise control.

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references

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