突扩管流动形态的数值模拟

Sudden Expansion Pipe Flow Pattern of the Numerical Simulation

针对油品在管道中运输时常常遇到边界突然扩大的流动状态。分别建立突扩管的物理模型、数学模型,并应用软件模拟不同雷诺数、不同突扩比下的管内流体的流动形态,得出了不同雷诺数下轴向压力的变化趋势以及局部水头损失随突扩比的影响规律。结果可以很好地反映突扩管流的基本特征。对于石油生产中常见的此类问题的研究具有重要的意义和作用。

For the pipeline transportation of oil in the border sudden expansion of the To established physical model, mathematical model, and application software to simulate bet, different enlargement ratio of fluid movement form, the trend of the axial pressure flow state is otten taced. different Reynolds num-under different Reynolds numbers, as well as the local head loss with the sudden expansion of the law is obtained. The results can be very good response to sudden expansion of the basic characteristics of pipe flow, common for the oil production of such issues of great significance and role.