管道冰水两相流动临界流速的数值模拟

Numerical Simulation of Critical Velocity for Ice-water Two-phase Flow in Pipes

为了研究极地船舶海水管道内冰水两相流动阻力问题,运用Fluent软件建立了水平管固液两相流动的临界流速值计算模型。验证了运用欧拉-欧拉模型模拟管道固液两相流动的有效性,确定了管道两相流动的充分发展段;然后从管道平均压降、固相分布及流态变化研究临界流速;经与文献实验值比较,结果表明:通过分析不同流速下冰水两相的流态变化,可以计算得到较为精准的临界流速范围值。

In order to study the resistance of ice-water two-phase flow in seawater pipes of polar ships,calculation model for the critical velocity of the solid-liquid two-phase flow in horizontal pipes is established by fluent software.The effectiveness of Euler-Euler model to simulate pipeline solid-liquid two-phase flow is verified,and the fully developed section of pipeline two-phase flow is determined.Then,the critical velocity is studied from the average pressure drop,solid phase distribution and flow state change.Compared with the experimental data in literature,the results show that the accurate critical velocity range can be calculated by analyzing the flow state changes of the two-phase under different flow rates.