摘要
针对原有叶片圆盘泵扬程和效率较低的状况,在原有叶轮的基础上进行了结构改型,采用多重参考坐标系法模拟叶轮在泵内旋转。利用Eulerian多相流模型、标准κ-ε湍流模型与SIMPLEC算法对改型前、后叶片圆盘泵进行数值模拟,得出改型前、后叶片圆盘泵在清水介质条件下的效率和扬程水力性能曲线,分析不同圆弧过渡角度及轴向伸出长度对泵水力性能影响,对比分析改进前、后叶轮的抗气蚀性能;并得出改进前、后叶片圆盘泵在固液两相流条件下的固相颗粒体积分布云图。结果表明:改型后的叶片圆盘泵模型不仅具有改进前叶片圆盘泵的优点,且效率、扬程及抗气蚀性能均高于改型前叶片圆盘泵。
Concerning the status of low head and low efficiency of the disc pump with radial straight blade,a structure improvement for the original impeller was made.The multiple reference frames（MRFS） approach was used to simulate impeller rotation in pump casing,and the solid/liquid two-phase turbulent flow in the two different disc pumps were simulated by using Eulerian multiphase model,standard turbulence model and SIMPLE algorithm.The η—Q curve and H—Q curve were obtained between the two different disc pumps when pumping water.The effects of different arc transition angles and different extended lengths of axial on the hydraulic performance were analyzed.Cavitation performance was compared and volume fraction distribution for solid-phase between two different impellers was obtained.The results showed that the improved disc pump not only own the advantages in unimproved disc pump,but also has the higher efficiency and higher head as well as better cavitation performance.
出处
《流体机械》
CSCD
北大核心
2012年第6期19-23,18,共6页
Fluid Machinery
基金
国家科技重大专项课题"深水油气田开发钻完井工程配套技术"(2008ZX05026-001-12)
关键词
叶片圆盘泵
改型设计
固液两相湍流
性能预测
数值模拟
disc pump with radial straight blade
improved design
solid-liquid two-phase turbulent flow
performance prediction
numerical simulation
