Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system
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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Posted 22 Oct, 2020
On 08 Dec, 2020
On 08 Dec, 2020
On 02 Nov, 2020
Received 28 Oct, 2020
On 13 Oct, 2020
Invitations sent on 13 Oct, 2020
On 13 Oct, 2020
On 12 Oct, 2020
On 12 Oct, 2020
Received 03 Oct, 2020
On 03 Oct, 2020
On 19 Sep, 2020
Received 17 Sep, 2020
On 16 Sep, 2020
On 15 Sep, 2020
Invitations sent on 15 Sep, 2020
On 14 Sep, 2020
On 14 Sep, 2020
On 17 Aug, 2020
Received 06 Aug, 2020
Received 05 Aug, 2020
On 31 Jul, 2020
On 28 Jul, 2020
Invitations sent on 28 Jul, 2020
On 28 Jul, 2020
On 27 Jul, 2020
On 27 Jul, 2020
On 24 Jul, 2020
Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system
Posted 22 Oct, 2020
On 08 Dec, 2020
On 08 Dec, 2020
On 02 Nov, 2020
Received 28 Oct, 2020
On 13 Oct, 2020
Invitations sent on 13 Oct, 2020
On 13 Oct, 2020
On 12 Oct, 2020
On 12 Oct, 2020
Received 03 Oct, 2020
On 03 Oct, 2020
On 19 Sep, 2020
Received 17 Sep, 2020
On 16 Sep, 2020
On 15 Sep, 2020
Invitations sent on 15 Sep, 2020
On 14 Sep, 2020
On 14 Sep, 2020
On 17 Aug, 2020
Received 06 Aug, 2020
Received 05 Aug, 2020
On 31 Jul, 2020
On 28 Jul, 2020
Invitations sent on 28 Jul, 2020
On 28 Jul, 2020
On 27 Jul, 2020
On 27 Jul, 2020
On 24 Jul, 2020
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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