發(fā)布時間：2019-03-19 10:18

【摘要】：高速列車進入隧道產(chǎn)生初始壓縮波,該壓縮波以當?shù)芈曀傧蛩淼莱隹趥鞑ゲa(chǎn)生脈沖波,脈沖波足夠大時,會產(chǎn)生音爆響聲。采用有限體積方法和任意滑移界面動網(wǎng)格技術(shù)方法,基于PISO算法和SSTk-ω高雷諾數(shù)湍流模型求解了高速列車通過隧道引起的三維可壓縮非定常的空氣湍流流動,數(shù)值模擬研究了我國高速列車和隧道條件下初始壓縮波的基本特性。研究表明,初始壓縮波是由于列車頭部進入隧道瞬間洞內(nèi)空氣流動空間受到限制所形成的,形成初期具有三維特性,在傳播一定距離后變成一維平面波。此外,在相同高度下,離車體越近初始壓縮波變化越明顯;靠近車體一側(cè)離地面越近初始壓縮波變化越大,而遠離車體一側(cè)初始壓縮波變化基本一致;初始壓縮波的壓力時間變化率峰值與車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.
【作者單位】： 蘭州交通大學機電工程學院;
【基金】：國家自然科學基金(51065013) 國家973計劃(2011CB711101)資助項目
【分類號】：O355

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