风洞试验段闭口与开口模式下流场的数值模拟与实验研究

廖鹏; 傅继阳; 马文勇; 何运成

doi:10.6052/j.issn.1000-4750.2021.05.S032

风洞试验段闭口与开口模式下流场的数值模拟与实验研究

廖鹏^1,,
傅继阳^1,,
马文勇^2,,
何运成^{1, ,}

- 1.
  广州大学风工程与振动工程中心，广州 510000
- 2.
  河北省风工程和风能利用工程技术创新中心，石家庄 050043
基金项目:
国家杰出青年科学基金项目(51925802)；河北省风工程和风能利用工程技术创新中心(石家庄铁道大学)开放课题项目(ICWEHB202001)

详细信息

作者简介:
廖　鹏(1995−)，男，广东人，硕士，主要从事结构风工程研究(E-mail: 2111916022@e.gzhu.edu.cn)
;

傅继阳(1976−)，男，湖北人，教授，博士，副校长，主要从事结构风工程研究(E-mail: jiyangfu@gzhu.edu.cn)
;

马文勇(1981−)，男，陕西人，教授，博士，主要从事结构风工程研究(E-mail: mawenyong@126.com)

通讯作者: 何运成(1984−)，男，河北人，副教授，博士，主要从事结构风工程研究(E-mail: yuncheng@gzhu.edu.cn)

中图分类号: V211.74
收稿日期: 2021-05-30

修回日期: 2022-03-22

刊出日期: 2022-06-25

NUMERICAL SIMULATION AND EXPERIMENTAL STUDY OF FLOW FIELD IN CLOSED AND OPEN WIND TUNNEL TEST SECTION

Peng LIAO^1,,
Ji-yang FU^1,,
Wen-yong MA^2,,
Yun-cheng HE^{1, ,}

- 1.
  Guangzhou University Wind Engineering and Vibration Engineering Center, Guangzhou 510000, China
- 2.
  Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China

More Information

Corresponding author: Yun-cheng HE, E-mail: yuncheng@gzhu.edu.cn

Received Date: 30 May 2021

Revised Date: 22 March 2022

Publish Date: 25 June 2022

摘要

摘要:
为了满足不同空气动力学模型安装的需求，风洞设计成一种试验段可拆卸构造，原来闭口式小型风洞进行试验段拆除可成为开口式风洞，为了提高开口式风洞的流场品质，设计一套包括收集器和小收缩段的整流装置。使用CFD方法对不同类型的风洞进行流场三维数值模拟，湍流模型采用 SST k-ω湍流模型，同时，采用眼镜蛇探针对实际的不同类型的风洞流场进行测试实验，主要研究风洞的速度均匀性和湍流强度的变化趋势，对风洞的流场品质进行评估和对比。实验和数值仿真结果证明：模拟的速度和湍流强度剖面与实测具有良好一致性，在风洞试验段平均风速在一定测试风速下，闭口式风洞具备低湍流强度和高流动均匀度的特点的流场品质，其中心区域湍流强度在0.3%以下。此外，证明了这套整流装置的设计可提高了开口式风洞的流场品质，在风洞试验段风速最大速度50%左右时，其中心区域湍流度在0.5%以下，边界层厚度减少到50 mm。这些结论将对小型风洞装置的设计、改进奠定了基础。
- 小型风洞 /
- 流场品质 /
- 整流装置 /
- 数值仿真 /
- 湍流强度
Abstract:
In order to meet the installation requirements of different aerodynamic models, the wind tunnel is designed as a structure with removable test segment, so that the original small closed-mouth wind tunnel can become an open wind tunnel by removing the test section. In order to improve the flow field quality of the open wind tunnel, a set of rectifier devices are designed including a collector and a small shrink section. Using CFD method, the flow field numerical values are simulated for different types of wind tunnels, and the turbulence model uses the SST k-ω turbulence model. At the same time, the Cobra probe is used to test the actual types of wind tunnel flow field, mainly to study the change trend of the speed uniformity and turbulence intensity, and to evaluate and compare the flow field quality of wind tunnels. Experimental and numerical simulation results show that the simulated speed and turbulence intensity profile are consistent with the measured. At a specific average wind speed of the wind tunnel test segment, the closed-mouth wind tunnel has the characteristics of low turbulence strength and high flow uniformity, and its central region turbulence intensity is below 0.3%. In addition, it is proved that the design of this rectifier can improve the flow field quality of the open wind tunnel. When the wind speed of the wind tunnel test section is about 50% of the maximum speed, the central area turbulence is below 0.5%, and the thickness of the boundary layer is reduced to 50 mm. These conclusions will lay the foundation for the design and improvement of small wind tunnel installations.
- small wind tunnel /
- flow field quality /
- rectification device /
- numerical simulation /
- turbulent intensity

HTML全文

图 1 整体风洞设计模型

Figure 1. The overall wind tunnel design model

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图 2 整流装置

Figure 2. Wind tunnel rectification device

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图 3 风洞模型计算域

Figure 3. Part of the model grid diagram

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图 4 部分风洞模型网格示意图

Figure 4. Part of the model grid diagram

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图 5 眼镜蛇探针安装与细节

Figure 5. Corba probe installation and details

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图 6 测试点位置

Figure 6. Test point location

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图 7 截面X=0.50 m无量纲速度和湍流强度

Figure 7. Dimensionless mean velocity and turbulence intensity of the flow at the X=0.50 m test section

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图 8 截面X=0.75 m无量纲速度和湍流强度

Figure 8. Dimensionless mean velocity and turbulence intensity of the flow at the X=0.75 m test section

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图 9 截面X=0.10 m无量纲速度和湍流强度

Figure 9. Dimensionless mean velocity and turbulence intensity of the flow at the X=0.10 m test section

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图 10 Z=0垂直截面的速度云图(工况S1)

Figure 10. Contours of Z=0 vertical section velocity magnitude (working condition S1)

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图 11 截面X=0.50 m无量纲速度和湍流强度

Figure 11. Dimensionless mean velocity and turbulence intensity of the flow at the X=0.50 m test section

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图 12 Z=0垂直截面的速度云图(工况S2)

Figure 12. Contours of Z=0 vertical section velocity magnitude (working condition S2)

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图 13 截面X=0.50 m无量纲速度和湍流强度

Figure 13. Dimensionless mean velocity and turbulence intensity of the flow at the X=0.50 m test section

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图 14 Z=0垂直截面的速度云图(工况S3)

Figure 14. Contours of Z=0 vertical section velocity magnitude (working condition S3)

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图 15 Z=0垂直截面的速度云图(工况S4)

Figure 15. Contours of Z=0 vertical section velocity magnitude (working condition S4)

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图 16 Z=0垂直截面的速度云图(工况S5)

Figure 16. Contours of Z=0 vertical section velocity magnitude (working condition S5)

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表 1 各类风洞入口边界条件

Table 1. Various wind tunnel entrance boundary conditions

工况	风洞类型	速度/(m/s)	湍流强度/(%)
S1	完整风洞	2.27	4.6
S2	拆除试验段	2.01	10.3
S3	拆除试验段安装收集器	2.12	10.5
S4	拆除试验段安装小收缩段	1.98	16.0
S5	拆除试验段安装整套整流装置	2.11	15.3

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风洞试验段闭口与开口模式下流场的数值模拟与实验研究

通讯作者: 何运成(1984−)，男，河北人，副教授，博士，主要从事结构风工程研究(E-mail: yuncheng@gzhu.edu.cn)

NUMERICAL SIMULATION AND EXPERIMENTAL STUDY OF FLOW FIELD IN CLOSED AND OPEN WIND TUNNEL TEST SECTION

Corresponding author: Yun-cheng HE, E-mail: yuncheng@gzhu.edu.cn

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