高速列车进入隧道诱发初始压缩波效应的数值模拟
发布时间：2019-03-19 10:18
【摘要】：高速列车进入隧道产生初始压缩波,该压缩波以当地声速向隧道出口传播并产生脉冲波,脉冲波足够大时,会产生音爆响声。采用有限体积方法和任意滑移界面动网格技术方法,基于PISO算法和SSTk-ω高雷诺数湍流模型求解了高速列车通过隧道引起的三维可压缩非定常的空气湍流流动,数值模拟研究了我国高速列车和隧道条件下初始压缩波的基本特性。研究表明,初始压缩波是由于列车头部进入隧道瞬间洞内空气流动空间受到限制所形成的,形成初期具有三维特性,在传播一定距离后变成一维平面波。此外,在相同高度下,离车体越近初始压缩波变化越明显;靠近车体一侧离地面越近初始压缩波变化越大,而远离车体一侧初始压缩波变化基本一致;初始压缩波的压力时间变化率峰值与车速的三次方近似成正比。
[Abstract]:The high-speed train enters the tunnel to produce the initial compression wave, which propagates to the tunnel exit at the local sound speed and produces the pulse wave. When the pulse wave is large enough, it will produce the sound explosion sound. Based on the PISO algorithm and the SSTk- 蠅 high Reynolds number turbulence model, the three-dimensional compressible unsteady turbulent air flow caused by a high-speed train passing through a tunnel is solved by using the finite volume method and the technique of moving grid at arbitrary sliding interface, based on the finite volume method and the SSTk- 蠅 high Reynolds number turbulence model. The basic characteristics of initial compression wave under high-speed train and tunnel conditions in China are studied by numerical simulation. It is shown that the initial compression wave is formed due to the limitation of the air flow space in the tunnel at the moment the train head enters the tunnel. The initial compression wave has three-dimensional characteristics and becomes a one-dimensional plane wave after a certain distance of propagation. In addition, at the same height, the closer the vehicle body to the body, the more obvious the initial compression wave change, and the closer the vehicle side to the ground, the greater the change of the initial compression wave, while the change of the initial compression wave far away from the vehicle body side is basically the same. The peak pressure-time variation rate of the initial compression wave is approximately proportional to the cubic power of the vehicle speed.
【作者单位】： 兰州交通大学机电工程学院;
【基金】：国家自然科学基金(51065013) 国家973计划(2011CB711101)资助项目
【分类号】：O355
本文编号：2443430
[Abstract]:The high-speed train enters the tunnel to produce the initial compression wave, which propagates to the tunnel exit at the local sound speed and produces the pulse wave. When the pulse wave is large enough, it will produce the sound explosion sound. Based on the PISO algorithm and the SSTk- 蠅 high Reynolds number turbulence model, the three-dimensional compressible unsteady turbulent air flow caused by a high-speed train passing through a tunnel is solved by using the finite volume method and the technique of moving grid at arbitrary sliding interface, based on the finite volume method and the SSTk- 蠅 high Reynolds number turbulence model. The basic characteristics of initial compression wave under high-speed train and tunnel conditions in China are studied by numerical simulation. It is shown that the initial compression wave is formed due to the limitation of the air flow space in the tunnel at the moment the train head enters the tunnel. The initial compression wave has three-dimensional characteristics and becomes a one-dimensional plane wave after a certain distance of propagation. In addition, at the same height, the closer the vehicle body to the body, the more obvious the initial compression wave change, and the closer the vehicle side to the ground, the greater the change of the initial compression wave, while the change of the initial compression wave far away from the vehicle body side is basically the same. The peak pressure-time variation rate of the initial compression wave is approximately proportional to the cubic power of the vehicle speed.
【作者单位】： 兰州交通大学机电工程学院;
【基金】：国家自然科学基金(51065013) 国家973计划(2011CB711101)资助项目
【分类号】：O355
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1 李国彬;对简单压缩波定性理论的质疑[J];昆明师专学报;1995年S1期
2 ;[J];;年期
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