While highspeed railways have been built
and operated worldwide, superhighspeed railways will become one of the development trends of rail
transit, as a fast, comfortable, and energysaving mode
of transportation. As train speed increases, the aerodynamic drag of trains
increases significantly. To effectively reduce the aerodynamic drag and realize
the superhighspeed traffic,
evacuated tube transportation arises at the historic moment. The evacuated tube
parameters have always been one of the focuses of evacuated tube
transportation. To clarify the relationship between evacuated tube parameters
and train speed, and obtain a simple and applicable design method of evacuated
tube parameters, in this paper, the aerodynamic drag of trains traveling in
standard highspeed railway tunnel at the speed of 350
km/h is taken as the criterion, and detailed researches are conducted on the
mutual influence of blockage ratio, train speed, and internal tube pressure
based on Tomoshige Hara Theory. Moreover, the theoretical values of the
aerodynamic drag of trains traveling in evacuated tube are compared with that
of numerical results. The research results show that: (1) The theoretical value
nearly fits the numerical one. Therefore, the aerodynamic drag characteristics
of evacuated tube transportation trains can be analyzed based on Tomoshige Hara
Theory. (2) A parameter design method and parameter selection curve of
evacuated tube based on the aerodynamic drag of highspeed
trains is given, which can provide theoretical guidance for the selection of
working parameters of evacuated tube.
LUO Yang, WANG Yingxue, REN Wenqiang
. Parameter Design of Evacuated Tube Transportation
Based on Equivalent Aerodynamic Drag of HighSpeed
Trains[J]. Tunnel Construction, 2021
, 41(S1)
: 345
.
DOI: 10.3973/j.issn.2096-4498.2021.S1.044
