新型开敞式泵装置模型试验与内流分析

发布时间：2018-05-13 03:15

本文选题：泵装置 + 模型试验　；参考：《中国农村水利水电》2016年04期

【摘要】：针对新型开敞式轴流泵装置,设计和制作模型泵装置,测得5个叶片角度下模型泵装置的动力特性、3个叶片角度下的汽蚀特性和叶片角-2°下的飞逸特性。研究结果表明,该形式轴流泵装置在装置扬程1.86~3.8m具有较高的装置效率,在叶片角-4°时的最高效率可达74.4%,较大范围运行工况下的汽蚀性能优良,单位飞逸转速298.7r/min,事故飞逸安全。利用三维湍流数值模拟得到了叶片角度0°整体泵装置外特性和内部流动特征,并与试验结果进行了比较。结果表明,设计工况下两者较吻合,偏离设计工况有一定偏差,但效率偏差均小于1.6%;钟形进水流道流态较好,但出水流道存在两个漩涡流,流态相对较差。研究结果对大型排涝泵站的优化设计具有重要参考价值。
[Abstract]:In view of the new open type axial flow pump device, the model pump device was designed and made, and the dynamic characteristics of the model pump device under 5 blade angles were measured, the cavitation characteristics under 3 blade angles and the runaway characteristics under the blade angle of -2 degrees under the blade angle showed that this type of axial flow pump has a higher device efficiency in the device head 1.86~3.8m, and the blade is in the blade. At the angle of -4, the maximum efficiency is up to 74.4%, the cavitation performance is excellent under the operating condition of the larger range, the unit flying speed is 298.7r/min and the accident is safe. The external characteristics and internal flow characteristics of the blade angle 0 degree integral pump are obtained by the three-dimensional turbulence numerical simulation, and the results are compared with the test results. The results show that the design condition is two. There is a certain deviation from the design conditions, but the deviation of the efficiency is less than 1.6%, and the flow state of the bell shaped inlet channel is better, but there are two vortex flows in the outlet channel, and the flow state is relatively poor. The research results have important reference value for the optimization design of the large waterlogging pumping station.

【作者单位】：江苏省洪泽湖水利工程管理处;扬州大学水利与能源动力工程学院;
【基金】：江苏省水利科技重点项目(2014022)
【分类号】：TV136.2

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