双吸双流道泵固液两相流动特性分析

发布时间：2018-05-27 10:36

本文选题：双吸双流道泵 + 泥沙　；参考：《流体机械》2016年05期

【摘要】：为研究双吸双流道泵的固液两相流动规律,本文基于CFD性能预测方法,计算泵在不同沙粒直径、不同沙粒浓度、不同流量工况的内部流动规律与外部特性曲线,并与单相流进行对比分析。研究结果表明:含沙多相流,流道中的压力梯度更大,压差分布更明显;流道内的脱流损失更严重,漩涡区域更明显,叶轮出口与蜗壳进口的动静耦合作用更剧烈;固相颗粒主要集中在叶轮的上下盖板处以及靠近蜗壳出口侧的流道区域;叶轮流道进口处的颗粒相对较少,出口处的颗粒相对较多;颗粒直径的变化对固相的离析作用明显,随着泥沙直径与流量的增大,泵的进出口总压差减小,随着泥沙浓度的增大,泵进出口总压差增大。
[Abstract]:In order to study the solid-liquid two-phase flow law of double-suction two-channel pump, the internal flow law and external characteristic curve of pump with different sand diameter, different sand concentration and different flow rate were calculated based on CFD performance prediction method. And compared with single phase flow. The results show that the pressure gradient and pressure difference in the channel are larger and the pressure difference distribution is more obvious, the deflow loss in the channel is more serious, the vortex region is more obvious, and the dynamic and dynamic coupling between the impeller outlet and the inlet of the volute is more intense. The solid particles are mainly concentrated in the upper and lower cover plate of impeller and the flow channel area near the outlet side of the volute, the particles at the inlet of impeller flow channel are relatively small and the particles at the outlet are relatively large, and the change of particle diameter has obvious effect on solid phase segregation. With the increase of sediment diameter and flow, the total pressure difference of pump inlet and outlet decreases, and with the increase of sediment concentration, the total pressure difference of pump inlet and outlet increases.
【作者单位】：东南大学;农业部水泵质量监督检验测试中心;国网四川省电力公司广元供电公司;
【分类号】：TH311

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