Preliminary Study of Aerodynamic Characteristics of High Temperature Superconducting Maglev-Evacuated Tube Transport System

Bao, Shijie; Wang, Bo; Zhang, Yong; Deng, Zigang

doi:10.12783/dtetr/icia2017/15646

Cited by 5 publications

(4 citation statements)

References 9 publications

(10 reference statements)

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“…Liu et al [17] modeled the aerodynamic calculation model of high-speed train with the evacuated tube under low-pressure environment, studied the influence of air pressure, blockage ratio and train's running speed on the aerodynamic drag of the train, and gave the optimal relationship between air pressure, blockage ratio and train's speed of the evacuated tube transportation system. Bao et al [18] found the shape of the train body and the structure of the tube can affect the aerodynamic drag, and the blockage ratio is the main factor. In addition, Kim et al [19] also found that when shock waves are generated during the tube train operation, the aerodynamic drag will increase dramatically.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

et al. 2020

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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. The heat quantity generated by aerodynamic heating is not easy to spread to external environment and then accumulates in the tube, inducing the ambient temperature in the tube to rise gradually. 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 is, the shorter the low temperature region in the wake will be. 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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Section: Introductionmentioning

confidence: 99%

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Liu et al [17] modeled the aerodynamic calculation model of high-speed train with the evacuated tube under low-pressure environment, studied the in uence of air pressure, the blockage ratio and train's running speed on the aerodynamic drag of the train, and gave the optimal relationship between air pressure, blockage ratio and train's speed of the evacuated tube transportation system. Bao et al [18] found the shape of the train body and the structure of the tube can affect the aerodynamic drag, and the blockage ratio is the main factor. In addition, Kim et al [19] also found that when shock waves are generated during the tube train operation, the aerodynamic drag will increase dramatically.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, in the study of aerodynamic heating of the tube train, most scholars adopt a two-dimensional geometric model, which makes it impossible to further observe the temperature distribution on the train surface and in the tube. In the future, most of the trains in the tube will be maglev trains [1] , some types of the maglev trains' external equipment cannot be in high temperature environment, such as the high temperature superconducting maglev of Southwest Jiaotong University [18] , whose bottom contains several cryostats similar to the wheels of wheel-rail trains, which need to be far away from high temperature environment. Therefore, it is necessary to study the in uence of the initial ambient temperature on the aerodynamic heating and the temperature distribution in the tube.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

Bao

Wang

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

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 be 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. Considering that 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.

show abstract

“…Liu et al [17] modeled the aerodynamic calculation model of high-speed train with the evacuated tube under low-pressure environment, studied the in uence of air pressure, blockage ratio and train's running speed on the aerodynamic drag of the train, and gave the optimal relationship between air pressure, blockage ratio and train's speed of the evacuated tube transportation system. Bao et al [18] found the shape of the train body and the structure of the tube can affect the aerodynamic drag, and the blockage ratio is the main factor. In addition, Kim et al [19] also found that when shock waves are generated during the tube train operation, the aerodynamic drag will increase dramatically.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

Bao

Wang

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Preliminary Study of Aerodynamic Characteristics of High Temperature Superconducting Maglev-Evacuated Tube Transport System

Cited by 5 publications

References 9 publications

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

Numerical study on the influence of initial ambient temperature on the aerodynamic heating in the tube train system

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