横通道对高速磁浮列车的车隧耦合气动效应影响

Influence of Transverse Passage on Vehicle-tunnel Coupling Aerodynamic Effect for High-speed Maglev Train

高速磁浮列车通过隧道时会对车辆、隧道和环境等产生恶劣的空气动力学效应。通过数值模拟研究横通道断面大小、横通道位置和长度对600 km/h高速磁浮列车的车隧耦合气动效应的影响,并通过动模型试验验证了数值模拟方法的可靠性。研究结果表明:当圆拱形横通道宽度由3.8 m减至2.9 m时,列车表面测点压力波幅值增加8.8%,隧道测点压力波幅值几乎无变化,距离隧道出口20 m远处微气压波峰值增加5.4%;横通道位于隧道中间时,列车表面测点压力波幅值最小,横通道位置对隧道壁面压力波幅值无影响,对微气压波影响也较小;当横通道长度由30 m增至50 m时,列车表面测点压力波幅值增加11.8%,横通道长度对隧道壁面压力波幅值和微气压波影响不大。

When a high-speed maglev train passes through tunnels,the bad aerodynamic effect on vehicle,tunnel and environment will be induced.The influence of the size,position and length of transverse passage on vehicle-tunnel coupling aerodynamic effect of 600 km/h high-speed maglev train is studied by numerical simulation,and the reliability of numerical simulation method is verified by moving model test.Research results show that when the width of circular arch transverse passage decreases from 3.8 m to 2.9 m,the pressure wave amplitude at the measuring points on train surface increases by 8.8%,the pressure wave amplitude at the measuring points of tunnel wall has almost no change,and the peak value of the micro-pressure wave at 20 m from the tunnel exit increases by 5.4%.When the transverse passage is located in the middle of the tunnel,the pressure wave amplitude of the measuring points on train surface is the smallest.The position of transverse passage has no impact on tunnel wall pressure wave amplitude and has little effect on the micro-pressure wave.As the length of transverse passage increases from 30 m to 50 m,the pressure wave amplitude of the measuring points on train surface increases by 11.8%,and the transverse passage length has little impact on tunnel wall pressure wave amplitude and micro-pressure wave.