@Article{fdmp.2020.07976,
AUTHOR = {Tian Li, Xiaohan Zhang, Yao Jiang, Weihua Zhang},
TITLE = {Aerodynamic Design of a Subsonic Evacuated Tube Train System},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {16},
YEAR = {2020},
NUMBER = {1},
PAGES = {121--130},
URL = {http://www.techscience.com/fdmp/v16n1/38338},
ISSN = {1555-2578},
ABSTRACT = {The so-called Evacuated Tube Train (ETT) is currently being proposed as a 
high-speed transportation system potentially competitive with airplane transportation. 
Aerodynamic resistance is one of the most crucial factors for the successful design of an 
ETT. In the present work, a three-dimensional concept ETT model has been elaborated. 
The aerodynamic characteristics of the subsonic ETT have been numerically simulated 
under different conditions. The train’s running speed varies from 600 km/h up to 1200 
km/h, and the blockage ratio is in the range between 0.1 and 0.3. As the blocking ratio 
and running speed increase, the resistance of the head car increases greatly, while the 
resistance of the middle car changes slightly. The aerodynamic resistance of the tail car is 
affected by the shock wave emerging in the wake flow. Two different design criteria for 
the maximum allowed aerodynamic resistance are proposed for aerodynamic parameter 
matching. With an increase in the blockage ratio and running speed, the atmospheric 
pressure in the tube should be decreased to achieve a balance.},
DOI = {10.32604/fdmp.2020.07976}
}