并列双圆柱尾流切向喷射控制研究

袁方洋; 曹阳; 凃程旭; 邹衡

doi:10.11729/syltlx20190151

并列双圆柱尾流切向喷射控制研究

doi: 10.11729/syltlx20190151

袁方洋^1, ,,
曹阳¹,
凃程旭²,
邹衡³

1.
江南大学江苏省食品先进制造装备技术重点实验室, 江苏无锡 214122
2.
中国计量大学计量测试工程学院, 杭州 310018
3.
浙江省安全生产协会, 杭州 310018

基金项目:

国家自然科学基金青年科学基金 11802105

江苏省自然科学基金青年基金 BK20180621

中央高校基本科研业务费专项资金 JUSRP12034

详细信息

作者简介:
袁方洋(1990-), 男, 江苏无锡人, 讲师, 博士。研究方向:流体动力学。通信地址:江苏省无锡市滨湖区蠡湖大道1800号江南大学机械工程学院(214122)。E-mail:fyyuan@jiangnan.edu.cn

通讯作者:
袁方洋, E-mail:fyyuan@jiangnan.edu.cn

中图分类号: O357
计量
- 文章访问数: 167
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- 被引次数: 0
出版历程
- 收稿日期: 2019-11-12
- 修回日期: 2020-01-13
- 刊出日期: 2020-10-25

Control of side-by-side cylinders wake by a pair of tangential jets

1.
Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi Jiangsu 214122, China
2.
College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
3.
Zhejiang Safety Production Association, Hangzhou 310018, China

摘要

摘要: 采用PIV实验研究雷诺数为4000、中心距比为1.1的绕并列双圆柱流动施加切向喷射的尾涡控制特性。发现尾涡流场呈现双稳态偏流流型，偏向间隙流的存在将导致圆柱附近时均尾流场沿圆柱中心轴线不对称。分析圆柱尾流涡旋的分布情况和升力频谱，发现可以根据喷射角度θ及射流动量系数C_μ的大小将切向喷射尾流的控制效果分为无效区（θ≤20°或C_μ < 0.135）、非完全控制区（θ > 20°且C_μ > 0.135）和完全控制区（θ > 35°且C_μ > 0.304）。在非完全控制区，切向喷射诱导的射流势流区将并列双圆柱宽尾流抑制为窄尾流，涡系分布范围控制收缩在近尾流的一个三角形区域内。随着喷射角的增大或是射流动量系数的增大，圆柱所受升力的频谱峰值逐渐降低。在完全控制区，并列双圆柱尾流完全被消除，从时均场上看已无明显的涡旋存在，此时控制效果最优。
- 涡激振荡 /
- 流动控制 /
- 切向喷射 /
- 喷射角 /
- 喷射动量系数
Abstract: The active control of two side-by-side cylinders wake with a Reynolds number of 4000 and a pitch ratio of 1.1 was studied experimentally by the Particle Image Velocimetry (PIV) technique. The flow has a bistable biased flow structure, and the biased gap flow leads to the asymmetry of the flow field. The vortex distribution and the lift spectrum of the cylinders wake were analyzed and it is found that the control effect of tangential jets on the wake can be divided into an invalid zone (θ≤20° or C_μ < 0.135), an incomplete zone (θ > 20° and C_μ > 0.135) and a complete zone (θ > 35° and C_μ > 0.304) according to the values of the jet angle and the jet momentum coefficient. In the incomplete zone, the induced tangential jets potential region can restrain the wake of side-by-side cylinders to a triangle region. The range of the vortex distribution decreases with the increase of the injection angle or the jet momentum coefficient, and the peak value of the lift force spectrum decreases gradually. In the complete zone, the wake of side-by-side cylinders is eliminated and no obvious vortex structure can be found in the time-averaged flow field, and the performance of tangential jets is at its best.
- vortex-induced vibration /
- flow control /
- tangential jets /
- jet angle /
- jet momentum coefficient

HTML全文

图 1 风洞整体结构示意图

Figure 1. Structure of the wind tunnel

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图 2 控制实验装置示意图

Figure 2. Schematic diagram of control system

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图 3 PIV系统安装图

Figure 3. Picture of PIV system

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图 4 喷射尾流控制截面示意图

Figure 4. Cross section of jet wake control diagram

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图 5 C_μ=0.029时尾流场流线图与时均速度矢量图

Figure 5. Streamlines and time-average velocity vectors of wake at C_μ=0.029

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图 6 C_μ=0.218时尾流场流线图与时均速度矢量图

Figure 6. Streamlines and time-average velocity vectors of wake at C_μ=0.218

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图 7 C_μ=0.405时尾流场流线图

Figure 7. Streamlines of wake at C_μ=0.405

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图 8 θ=25°时尾流场流线图

Figure 8. Streamlines of wake at θ=25°

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图 9 θ=35°时尾流场流线图

Figure 9. Streamlines of wake at θ=35°

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图 10 θ=45°时尾流场流线图

Figure 10. Streamlines of wake at θ=45°

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图 11 Re=4000切向喷射尾流控制效果分区

Figure 11. Tangential jet wake control effect zones at Re=4000

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图 12 圆柱升力功率频谱分析

Figure 12. Spectrum analysis of cylinder lift

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