低温风洞排气塔流致振动的理论及数值研究

张伟; 高鑫鑫; 高荣; 张小斌; 程俊

doi:10.13224/j.cnki.jasp.20220422

低温风洞排气塔流致振动的理论及数值研究

doi: 10.13224/j.cnki.jasp.20220422

张伟^{1, 2},
高鑫鑫³,
高荣²,
张小斌³,
程俊^2,*, ,

1.
国防科技大学空天科学学院，长沙 410073
2.
中国空气动力研究与发展中心，四川绵阳 621000
3.
浙江大学制冷与低温工程研究所，杭州 310027

基金项目: 中国空气动力研究与发展中心基础和前沿技术研究基金探索项目（PJD20200240）

详细信息

作者简介:
张伟（1988-），男，工程师，硕士，主要从事低温两相流及流固耦合研究

通讯作者:
程俊（1984-），男，工程师，硕士，主要从事低温系统设计。E-mail：chengjun@cardc.cn

中图分类号: V211
计量
- 文章访问数: 27
- HTML浏览量: 13
- PDF量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-13
- 网络出版日期: 2023-12-26

Theoretical and numerical study on flow-induced vibration of exhaust tower in a cryogenic wind tunnel

ZHANG Wei^{1, 2},
GAO Xinxin³,
GAO Rong²,
ZHANG Xiaobin³,
CHENG Jun^{2,*
, ,}

1.
College of Aero Space Science and Engineering，National University of Defense Technology，Changsha 410073，China
2.
China Aerodynamics Research and Development Center，Mianyang Sichuan 621000，China
3.
Institute of Refrigeration and Cryogenics，Zhejiang University，Hangzhou 310027，China

摘要

摘要:
为分析排气塔在自然风载和内流共同作用下的结构安全性，采用理论和数值模拟方法分析了排气塔的流致振动响应情况。理论分析获得了排气塔在自然风载作用下的顺流响应和均值响应。采用计算流体力学方法，shear stress transport （SST）k-ω湍流模型和动网格数值技术实现了排气塔的双向流固耦合数值模拟，获得了排气塔在内外流动混合作用下的速度、压力和涡量分布。表明排气塔在特定风载下的旋涡脱落频率接近1阶模态频率，塔体应力较小，在许用应力范围内。
- 排气塔 /
- 流致振动 /
- 低温风洞 /
- 涡量 /
- 流固耦合
Abstract:
The flow-induced vibration response of the exhaust tower was analyzed by theoretical and numerical simulation methods to investigate the structural safety of the exhaust tower under the combined action of natural wind load and internal flow. The exhaust tower’s co-current response and mean response under the action of wild wind load were achieved. Then, using the computational fluid dynamics approach, shear stress transport (SST) k-ω turbulence model and dynamic mesh numerical technology, the exhaust tower’s two-way fluid-structure interaction numerical simulation was realized. The exhaust tower’s velocity, pressure, and vorticity distribution under the action of internal and external flow mixing were also obtained. The vortex shedding frequency of the exhaust tower under a specific wind load was close to the first-order modal frequency of the structure. The gained stress was within the allowable stress range of stainless steel.
- exhaust tower /
- flow-induced vibration /
- cryogenic wind tunnel /
- vortex /
- fluid-structure interaction

HTML

图 1 排气塔三维模型（单位：m）

Figure 1. 3D model of exhaust tower （unit：m）

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图 2 几何模型和流场布置

Figure 2. Geometry model and flow field distribution

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图 3 圆柱绕流区域网格分布

Figure 3. Mesh distribution at zone around cylinder

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图 4 t=4.42 s时x=0平面速度分布

Figure 4. Velocity distribution at plane x=0 at t=4.42 s

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图 5 t=4.42 s时z=31 m平面涡量分布

Figure 5. Vorticity distribution at plane z=31 m at t=4.42 s

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图 6 t=4.42 s时z=31 m平面流线分布

Figure 6. Streamline distribution at plane z=31 m at t=4.42 s

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图 7 外流场中的涡结构（λ₂等值面）

Figure 7. Vortex structure in outside fluid zone （isosurface of λ₂）

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图 8 涡结构局部特征（λ₂等值面）

Figure 8. Local feature of vortex structure （isosurface of λ₂）

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图 9 不同高度的速度变化

Figure 9. Velocity variation at different altitudes

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图 10 模拟与试验值的St对比

Figure 10. St comparison between simulation and experiment

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图 11 排气塔顶部变形随时间变化

Figure 11. Variation of displacement of venting tower with time

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图 12 排气塔顶部沿x方向变形随时间变化

Figure 12. Variation of displacement at x direction of venting tower with time

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图 13 排气塔顶部沿y方向变形随时间变化

Figure 13. Variation of displacement at y direction of venting tower with time

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图 14 沿y方向变形（未排气）

Figure 14. Displacement at y direction （without venting）

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图 15 变形运动轨迹

Figure 15. Deformation trajectory

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图 16 等效应力随时间变化

Figure 16. Variation of equivalent stress with time

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图 17 排气塔局部应力分布

Figure 17. Local stress distribution of venting tower

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表 1 排气塔振动模态频率

Table 1. Vibration modal frequency of exhaust tower Hz

模态频率模态频率

1 1.9587 4 12.027

2 1.9684 5 15.270

3 11.999 6 16.057

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