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海底隧道半横向通风方式模型试验与数值仿真

, PP. 63-68

Keywords: 隧道工程,海底隧道,物理模型,半横向,通风,计算流体力学

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Abstract:

为了研究半横向通风方式隧道内风速、风压的分布特点,针对某海底隧道半横向通风方案,建立19的缩尺物理模型与11的三维数值仿真模型,研究了排风孔开启数量与排风孔开启位置对隧道内风速、风压分布的影响。研究结果表明相同排风动力下,随着排风孔开启数量的增加,隧道内排风量增加,但增加幅度逐渐减小;开启事故位置下游2个排风孔,并固定距事故位置最近的第1处排风孔的位置,随着2个排风孔之间距离的增大,第1处排风孔的排风量增加,烟流扩散至第2处排风孔的行程增加,隧道排烟效率降低。

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