Influence of aerodynamic effect of wings on high-speed trains passing through tunnels
Integrating wings with high-speed trains can alleviate the downward pressure exerted on the track,subsequently decrease wear and tear.However,wings seriously influence the aerodynamic performance of high-speed train when high-speed train passes through tunnels.RNG k-ε equation turbulence model was employed to simulate the aerodynamic effects caused by high-speed trains with wings(HSTW)passing through tunnels.The results show that when the train enters the tunnel,the wing tail vortex field structure grows,which affects the train surface pressure.The wake of the wings decrease pressure on the train surface,while the wings increase the train/tunnel area ratio,which increases the pressure on the train surface.Both of them affect the pressure on the train surface,forming a complex pressure distribution on the train surface.The additional wings increase the pressure magnitude on both the train surface and the tunnel wall,with the maximum increase of 5.4%on train surface and 14.1%on tunnel wall.The wings also adversely affect the micro-pressure wave,and the amplitude of the micro-pressure wave at a distance of 20 m from the tunnel exit increases by 4.1%.The results can provide guidance for the design of wing parameters.
winghigh-speed traintunnelpressuremicro-pressure waveblockage ratio
国家科技期刊平台
NSTL
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