大气环境变化对真空管道温度场影响的研究

高超; 严日华; 武斌; 周廷波

doi:10.11729/syltlx20220116

大气环境变化对真空管道温度场影响的研究

doi: 10.11729/syltlx20220116

高超^1,,
严日华^1, ,,
武斌¹,
周廷波²

1.
西北工业大学翼型、叶栅空气动力学国家级重点实验室，西安　710072
2.
中国空气动力研究与发展中心设备设计与测试技术研究所，绵阳　621000

基金项目: 国家自然科学基金（12172299，12102359）

详细信息

作者简介:
高超：（1960—），男，陕西榆林人，博士，教授，博士生导师。研究方向：空气动力学试验与测量技术，流动控制技术，计算空气动力学及飞行器设计技术。通信地址：陕西省西安市碑林区友谊西路127号西北工业大学航空学院翼型、叶栅空气动力学国家级重点实验室（710072）。E-mail：gaochao@nwpu.edu.cn

通讯作者:
E-mail：yanrihua@mail.nwpu.edu.cn

中图分类号: U237
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- 文章访问数: 3070
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- 被引次数: 0
出版历程
- 收稿日期: 2022-11-01
- 修回日期: 2022-12-24
- 录用日期: 2023-01-08
- 网络出版日期: 2023-02-17
- 刊出日期: 2023-02-25

Study on the influence of atmospheric environment change on the temperature field of vacuum tube

GAO Chao^1
,,
YAN Rihua^{1
, ,},
WU Bin¹,
ZHOU Tingbo²

1.
National Key Laboratory of Science and Technology on Aerodynamic Design and Research, Northwestern Polytechnical University, Xi’an　710072, China
2.
Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center, Mianyang　621000, China

摘要

摘要: 真空管道内的温度分布直接影响管道内磁浮列车的气动性能及运行安全，研究大气环境对真空管道温度场的影响，对未来真空管道列车运输系统的建设具有重要意义。基于四川省成都市近5年（2017—2021）的气象数据，总结了各季节的太阳辐射强度、空气湿度、大气温度和风速等大气环境参数，建立了真空管道辐射传热数值计算方法，采用DO（Discrete Ordinate）辐射模型研究了太阳辐射对真空管道内气流温度的影响，得到了不同季节、不同真空度下管道内气流温度分布及变化规律。研究表明：在太阳辐射的影响下，真空管道内气流温度提升较大；在相同真空度下，管道内气流温度夏季最高、冬季最低；随着真空度逐渐降低，管道内气流温度逐渐升高，真空度为0.1 atm（约10.1 kPa）时，夏季管道内气流温度最大提升56.60 K。
- 真空管道 /
- 辐射传热 /
- 自然对流 /
- 大气环境 /
- 计算流体力学
Abstract: The temperature distribution in the vacuum tube directly affects the aerodynamic performance and operation safety of the maglev train. It is of great significance to study the influence of the atmospheric environment effect for the construction of the vacuum tube train transportation system in the future. The parameters of the atmospheric environment such as the solar radiation intensity, air humidity, temperature and wind speed in each season are obtained by collecting meteorological data of Chengdu in recent five years. The numerical calculation method of the radiation heat transfer from the vacuum tube is established. The DO (Discrete Ordinate) radiation model was used to study the influence of solar radiation on the air flow in the vacuum tube, and the temperature distribution and variation rule of the air flow in the tube under conditions of different seasons and different vacuum degrees were obtained. The results show that the air in the tube has a stable temperature rise under the influence of solar radiation. With the same vacuum degree, the temperature in the vacuum tube is the highest in summer and the lowest in winter. With the gradual decrease of the vacuum degree, the temperature of the air flow in the tube increases gradually in each season. When the vacuum degree is 0.1 atm (～10.1 kPa), the air temperature in the vacuum tube increases by 56.60 K in summer.
- vacuum tube /
- radiation /
- natural convection /
- atmospheric environment /
- computa-tional fluid dynamics

HTML全文

图 1 真空管道模型示意图

Figure 1. Schematic diagram of maglev flight tunnels

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图 2 计算域网格图

Figure 2. Grid diagram of calculation area

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图 3 辐射传热和自然对流示意图

Figure 3. Schematic diagram of radiation and natural convection

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图 4 对比算例中的管道截面网格图

Figure 4. Grid diagram at cross section

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图 5 Case 1的数值计算和试验结果对比图

Figure 5. Comparison of numerical calculation and test results in Case 1

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图 6 Case 2的数值计算和试验结果对比图

Figure 6. Comparison of numerical calculation and test results in Case 2

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图 7 真空度为1.0 atm时各季节管道中心截面的温度分布

Figure 7. Temperature distributions in different seasons when vacuum degree is 1.0atm

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图 8 真空度为1.0 atm时管道中心截面水平直径方向上的温度分布

Figure 8. Temperature distributions along horizontal diameter of the middle plane of tube when vacuum degree is 1.0 atm

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图 9 真空度为1.0 atm时管道中心截面竖直直径方向上的温度分布

Figure 9. Temperature distributions along the vertical diameter of the middle plane of tube when vacuum degree is 1.0 atm

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图 10 真空度为0.5 atm时各季节管道中心截面的温度分布

Figure 10. Temperature distributions in different seasons when vacuum degree is 0.5 atm

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图 11 真空度为0.5 atm时管道中心截面水平直径方向上的温度分布

Figure 11. Temperature distributions along horizontal diameter of the middle plane of tube when vacuum degree is 0.5 atm

下载: 全尺寸图片幻灯片

图 12 真空度为0.5 atm时管道中心截面竖直直径方向上的温度分布

Figure 12. Temperature distributions along the vertical diameter of the middle plane of tube when vacuum degree is 0.5 atm

下载: 全尺寸图片幻灯片

图 13 真空度为0.1 atm时各季节管道中心截面上的温度分布

Figure 13. Temperature distributions in different seasons when vacuum degree is 0.1 atm

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图 14 真空度为0.1 atm时管道中心截面水平直径方向上的温度分布

Figure 14. Temperature distributions along horizontal diameter of the middle plane of tube when vacuum degree is 0.1 atm

下载: 全尺寸图片幻灯片

图 15 真空度为0.1 atm时管道中心截面竖直直径方向上的温度分布

Figure 15. Temperature distributions along the vertical diameter of the middle plane of tube when vacuum degree is 0.1 atm

下载: 全尺寸图片幻灯片

表 1 成都市各月份气象数据表

Table 1. The table of Chengdu monthly aerodynamic data

季度	月份/月	温度/(°)	湿度/%	平均风速/(km·h⁻¹)
春
	3	13.0	0	9.3
	4	18.0	4	9.5
	5	22.0	24	9.4
夏
	6	25.0	75	8.6
	7	26.0	95	7.9
	8	26.5	90	7.6
秋
	9	22.0	50	7.5
	10	18.0	8	7.6
	11	13.0	0	7.7
冬
	12	8.0	0	7.6
	1	6.0	0	7.8
	2	8.5	0	8.6

下载: 导出CSV

表 2 成都市四季大气环境变量参数表

Table 2. Table of meteorological data of Chengdu in different seasons

季节	平均温度/(°)	平均湿度/%	平均风速/(km·h⁻¹)
春	17.7	9.3	9.4
夏	25.8	86.7	8.0
秋	17.7	19.3	7.6
冬	7.5	0	8.0

下载: 导出CSV

表 3 各季节管道外壁面换热系数

Table 3. Thermal convection coefficient of pipeline wall in different seasons

季节	换热系数/(W·m⁻²·K⁻¹)
春	4.54
夏	3.98
秋	3.81
冬	3.98

下载: 导出CSV

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