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Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system
Zigang Deng
Southwest Jiaotong University
Corresponding Author
ORCiD: https://orcid.org/0000-0001-7937-9081
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Advances in Aerodynamics.
The evacuated tube transportation has great potential in the future because of its advantages of energy saving and environmental protection. The train runs in the closed tube at ultra-high speed. Because the heat quantity generated by aerodynamic heating is not easy to spread to external environment and will accumulate in the tube, the phenomenon that the ambient temperature in the tube will gradually rise will be induced. In this paper, a three-dimensional geometric model and the Shear Stress Transport (SST) κ-ω turbulence model are used to study the influence of initial ambient temperature on the structure of the flow field in the tube. Simulation results show that when the train runs at transonic speed, the supersonic flow region with low temperature and low-pressure is produced in the wake. The structure of the flow field of the wake will change with the initial ambient temperature. And the higher the initial ambient temperature, the shorter the low temperature region in the wake. The larger temperature difference caused by the low temperature region may increase the temperature stress of the tube and affect the equipment inside the tube. Consequently, the temperature inside the tube can be maintained at a reasonable value to reduce the influence of the low temperature region in the wake on the system.
Keywords
Tube train, Initial ambient temperature, Aerodynamic heating, Numerical simulation
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CURRENT STATUS: Published
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Posted 22 Oct, 2020
Published
On 08 Dec, 2020
Published
On 08 Dec, 2020
No community comments so far
Editorial decision: Accept
On 02 Nov, 2020
Review #1 received
Received 28 Oct, 2020
Editor assigned
On 13 Oct, 2020
Reviewers invited
Invitations sent on 13 Oct, 2020
Reviewer #1 agreed
On 13 Oct, 2020
Submission checks complete
On 12 Oct, 2020
Editor invited
On 12 Oct, 2020
No comments provided
Review #2 received
Received 03 Oct, 2020
Editorial decision: Major revision
On 03 Oct, 2020
Reviewer #2 agreed
On 19 Sep, 2020
Review #1 received
Received 17 Sep, 2020
Reviewer #1 agreed
On 16 Sep, 2020
Editor assigned
On 15 Sep, 2020
Reviewers invited
Invitations sent on 15 Sep, 2020
Submission checks complete
On 14 Sep, 2020
Editor invited
On 14 Sep, 2020
No comments provided
Editorial decision: Major revision
On 17 Aug, 2020
Review #2 received
Received 06 Aug, 2020
Review #1 received
Received 05 Aug, 2020
Reviewer #2 agreed
On 31 Jul, 2020
Editor assigned
On 28 Jul, 2020
Reviewers invited
Invitations sent on 28 Jul, 2020
Reviewer #1 agreed
On 28 Jul, 2020
Submission checks complete
On 27 Jul, 2020
Editor invited
On 27 Jul, 2020
First submitted
On 24 Jul, 2020
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Subject Areas
Mechanical Engineering
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This preprint is under consideration at Advances in Aerodynamics. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research
Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system
Zigang Deng
Southwest Jiaotong University
Corresponding Author
ORCiD: https://orcid.org/0000-0001-7937-9081
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Version 3
Posted 22 Oct, 2020
Published
On 08 Dec, 2020
Published
On 08 Dec, 2020
No community comments so far
Editorial decision: Accept
On 02 Nov, 2020
Review #1 received
Received 28 Oct, 2020
Editor assigned
On 13 Oct, 2020
Reviewers invited
Invitations sent on 13 Oct, 2020
Reviewer #1 agreed
On 13 Oct, 2020
Submission checks complete
On 12 Oct, 2020
Editor invited
On 12 Oct, 2020
No comments provided
Review #2 received
Received 03 Oct, 2020
Editorial decision: Major revision
On 03 Oct, 2020
Reviewer #2 agreed
On 19 Sep, 2020
Review #1 received
Received 17 Sep, 2020
Reviewer #1 agreed
On 16 Sep, 2020
Editor assigned
On 15 Sep, 2020
Reviewers invited
Invitations sent on 15 Sep, 2020
Submission checks complete
On 14 Sep, 2020
Editor invited
On 14 Sep, 2020
No comments provided
Editorial decision: Major revision
On 17 Aug, 2020
Review #2 received
Received 06 Aug, 2020
Review #1 received
Received 05 Aug, 2020
Reviewer #2 agreed
On 31 Jul, 2020
Editor assigned
On 28 Jul, 2020
Reviewers invited
Invitations sent on 28 Jul, 2020
Reviewer #1 agreed
On 28 Jul, 2020
Submission checks complete
On 27 Jul, 2020
Editor invited
On 27 Jul, 2020
First submitted
On 24 Jul, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Mechanical Engineering
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Advances in Aerodynamics.
The evacuated tube transportation has great potential in the future because of its advantages of energy saving and environmental protection. The train runs in the closed tube at ultra-high speed. Because the heat quantity generated by aerodynamic heating is not easy to spread to external environment and will accumulate in the tube, the phenomenon that the ambient temperature in the tube will gradually rise will be induced. In this paper, a three-dimensional geometric model and the Shear Stress Transport (SST) κ-ω turbulence model are used to study the influence of initial ambient temperature on the structure of the flow field in the tube. Simulation results show that when the train runs at transonic speed, the supersonic flow region with low temperature and low-pressure is produced in the wake. The structure of the flow field of the wake will change with the initial ambient temperature. And the higher the initial ambient temperature, the shorter the low temperature region in the wake. The larger temperature difference caused by the low temperature region may increase the temperature stress of the tube and affect the equipment inside the tube. Consequently, the temperature inside the tube can be maintained at a reasonable value to reduce the influence of the low temperature region in the wake on the system.
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