不同导叶参数对混流泵水力性能的影响
发布时间：2018-07-28 10:48
【摘要】：为探求不同导叶参数对混流泵水力性能的影响,以比转速为438的模型泵为研究对象,在模型试验验证的基础上,采用计算流体动力学方法,以常规导叶设计为基础,在保持其他参数不变的情况下,分别数值模拟计算了4种不同导叶叶片数方案和7种不同导叶片扫掠角度方案的混流泵段水力性能。数值模拟结果表明:改变导叶叶片数对混流泵段外特性影响明显,不同流量下存在不同的最优叶片数,小流量工况运行时,应适当增加叶片数,大流量工况运行时,应适当减少叶片数;不同导叶片扫掠角度对大流量区域影响显著,不同流量存在不同的最优导叶片扫掠角度且随着流量的增大从-16°逐渐偏向+24°;在流量为510 L/s时,计算扫掠角度范围内对效率的影响达5.5%。
[Abstract]:In order to find out the influence of different guide blade parameters on the hydraulic performance of the mixed flow pump, the model pump with a specific speed of 438 is studied. On the basis of the model test verification, the computational fluid dynamics method is applied to the conventional guide blade design and the number of 4 different guide vane numbers is numerically simulated under the condition of keeping the other parameters constant. The scheme and the hydraulic performance of the mixed flow pump section of 7 different guide vane sweeping angle schemes are presented. The numerical simulation results show that the change of the number of guide vane has an obvious influence on the outer characteristics of the mixed flow pump, and there are different optimal number of blades under different flow rates. The number of blades should be increased properly when the small flow condition runs, and the blade should be appropriately reduced when the large flow condition is running. The sweep angle of different guide vane has a significant influence on the large flow area, and the different flow rates have different optimal blade sweep angles and gradually change from -16 degrees to +24 degrees with the increase of the flow rate; the effect of the calculation on the efficiency of the swept angle range is 5.5%. when the flow rate is 510 L/s.
【作者单位】： 扬州大学水利与能源动力工程学院;
【基金】：国家自然科学基金(51376155) “十二五”农村领域科技计划(2012BAD08B03-2) 江苏高校优势学科建设工程(PAPD)
【分类号】：TV136.2
本文编号：2149856
[Abstract]:In order to find out the influence of different guide blade parameters on the hydraulic performance of the mixed flow pump, the model pump with a specific speed of 438 is studied. On the basis of the model test verification, the computational fluid dynamics method is applied to the conventional guide blade design and the number of 4 different guide vane numbers is numerically simulated under the condition of keeping the other parameters constant. The scheme and the hydraulic performance of the mixed flow pump section of 7 different guide vane sweeping angle schemes are presented. The numerical simulation results show that the change of the number of guide vane has an obvious influence on the outer characteristics of the mixed flow pump, and there are different optimal number of blades under different flow rates. The number of blades should be increased properly when the small flow condition runs, and the blade should be appropriately reduced when the large flow condition is running. The sweep angle of different guide vane has a significant influence on the large flow area, and the different flow rates have different optimal blade sweep angles and gradually change from -16 degrees to +24 degrees with the increase of the flow rate; the effect of the calculation on the efficiency of the swept angle range is 5.5%. when the flow rate is 510 L/s.
【作者单位】： 扬州大学水利与能源动力工程学院;
【基金】：国家自然科学基金(51376155) “十二五”农村领域科技计划(2012BAD08B03-2) 江苏高校优势学科建设工程(PAPD)
【分类号】：TV136.2
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