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

GAO Chao; YAN Rihua; WU Bin; ZHOU Tingbo

doi:10.11729/syltlx20220116

Volume 37 Issue 1

Feb. 2023

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Article Navigation > Journal of Experiments in Fluid Mechanics > 2023 > 37(1): 72-81

GAO C, YAN R H, WU B, et al. Study on the influence of atmospheric environment change on the temperature field of vacuum tube[J]. Journal of Experiments in Fluid Mechanics, 2023, 37(1): 72-81 doi: 10.11729/syltlx20220116

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

doi: 10.11729/syltlx20220116

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

Received Date: 2022-11-01
Accepted Date: 2023-01-08
Rev Recd Date: 2022-12-24

Available Online: 2023-02-17

Publish Date: 2023-02-25

Abstract

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

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References(29)

References

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