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首页> 外文会议>International Conference on Civil Engineering and Transportation >Numerical simulation of effect of nose shape on tunnel entry/exit wave induced by a high-speed train passing through a tunnel
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Numerical simulation of effect of nose shape on tunnel entry/exit wave induced by a high-speed train passing through a tunnel

机译：通过隧道穿过隧道沟槽隧道入口/出口波影响的数值模拟

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摘要

The air flow around the high-speed train passing through a tunnel is three dimensional, compressible and unsteady in nature. This paper carried out the numerical simulation of it and evaluated the effect of nose shapes of high-speed trains on tunnel entry/exit waves radiated directly from tunnel entrance or exit. The elliptical, parabolic and conical nose shapes were analyzed. A commercial CFD code STAR-CD based on the finite volume method was used applying the SIMPLE algorithm and a moving grid technology. The comparison study shows that though the patterns of tunnel entry waves or exit waves induced by high-speed trains with above three nose shapes are similar, the amplitudes of them are different. The wave amplitude of elliptical shape is the highest, and that of conical shape is the lowest, which implies that with the nose shape be more streamlined and slender, it might be more likely to reduce the amplitudes of tunnel entry/exit waves.
机译：穿过隧道的高速列车周围的空气流是三维，可压缩和不稳定的。本文进行了它的数值模拟，并评估了直接从隧道入口或出口辐射的隧道入口/出口波上的高速列车鼻形状的效果。分析了椭圆形，抛物线和圆锥形鼻形。基于有限音量方法的商业CFD码Star-CD应用了简单的算法和移动网格技术。比较研究表明，虽然具有高于三个鼻形状的高速列车诱导的隧道入口波或出口波的图案是相似的，但它们的幅度是不同的。椭圆形状的波幅最高，圆锥形状是最低的，这意味着具有更精简和细长的鼻形，可能更有可能减少隧道入口/出口波的幅度。

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