低比转速半螺旋吸水室双吸泵流场的数值分析  

Numerical analysis on inner flow in low specific speed double-suction centrifugal pump with spiral suction chamber

作　　者：朱荣生[1] 欧鸣雄[1] 付强[1] 管荣国[1] 李继忠[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《排灌机械》2008年第4期39-42,共4页Drainage and Irrigation Machinery

基　　金：江苏省科技攻关重大项目(BE2006084)

摘　　要：在CFD软件Fluent中采用考虑了旋转与曲率影响的RNG湍流模型,对具有半螺旋形吸水室的单级双吸离心泵进行了全流道(包括吸水室流道在内)数值模拟计算.结果发现,在叶轮流道内流速沿叶轮进口到出口逐渐增大;在叶轮流道前半部,靠近压力面处的流速明显大于吸力面,叶轮流道内压力分布基本和设计相符.通过对半螺旋形吸水室流道内部流场数值模拟结果进行分析后发现,在设计流量点,半螺旋流道出口隔舌及密封体处出现漩涡,并随着流量的增大漩涡逐渐明显,对叶轮进口产生影响.该结果对双吸泵及其进水流道进一步的性能优化设计提供了依据.With the use of RNG turbulent model in the CFD software Fluent, the inner flow of double suction centrifugal pump with semi-spiral suction chamber was calculated. It was found that the flow rate is increasing from inlet to outlet in the impeller at the first half of impeller channel; the velocity beside the pressure side of blade is larger than that beside the suction side. The flow field distribution of impeller is uniform. But in the semi-spiral suction chamber, swirls occur beside the tongue and sealed block at the designed flow rate, and the swirls become more obviously when the flow rate increases, which has effect on the inlet condition of the impeller. The above analysis provides references for the improvement of the double suction pump with semi-spiral suction chamber.

关 键 词：双吸离心泵 模拟 叶轮 半螺旋形吸水室 漩涡 优化 

分 类 号：TH311[机械工程—机械制造及自动化]