海底双层输油管道泄漏扩散数值分析

Numerical Analysis on Leakage and Diffusion of Double-skin Oil Pipeline under the Sea

建立了海底双层输油管道发生泄漏时的物理模型和数学模型。利用Fluent模拟软件,对海底双层输油管道泄漏过程进行二维数值模拟。结果表明:(1)垂直泄漏孔方向,压力逐渐升高,夹层压力传递过程中发生击波现象,击波范围逐渐减小。(2)对应泄漏孔壁面速度几乎为零,沿外壁面上速度最大。随着泄漏时间增加,速度逐渐减小。(3)泄漏最初夹层空间温度较高,泄漏孔压力越大,温度变化越快。

The physical model and mathematical model of double-skin oil pipeline under the sea are estab- lished. Fluent simulation software is used for 2d simulation of leakage of double-skin oil pipeline under the sea. speed corresponding leak leakage is, the time increased ; more quickly the hole wall is almost zero, the （3） sandwich temperature of temperature varies. maximum speed is on the wall, speed reduces gradually with initial leakage is very high,, the bigger pressure of leak hole