海水循环水泵房流道模型试验及优化设计研究

Model test on intake channel of seawater circulating pump house and its optimization design

结合某LNG项目,对其循环水泵房流道进行物理模型试验,探讨了泵房流道优化设计方法,针对原设计方案下吸水室内存在的表面吸气涡、表面回流、管外环流等不利流态,采用了延长隔墙、增加淹没胸墙等整流措施,有效地改善了泵房吸水室内流速分布的均匀性,消除了不利流态。优化后的推荐方案能够满足海水泵安全稳定运行的要求,研究成果也为其它类似的大中型海水泵工程提供了参考。

Taking the seawater circulating pump house of a LNG project as the research object, a physical model test on the intake channel of the said pump house was carried out, and the methods for its optimization design was discussed. In view of the surface vortex, surface reflux, circumfluence outside the pipe, and some other bad flow patterns which may happen in the suction chamber if the original design scheme were used, some modification measures for improving the flow pattern such as： prolong the partition wall, build submerged breast wall and so on were adopted. The mentioned measures made the flow velocity distribution in the suction chamber to be symmetrical, and eliminated bad flow pattern. The recommended optimization scheme could ensure the safe and stable operation of the seawater pump, besides, the research results provided references for those similar projects with large or medium-sized seawater pump.