| 轴流泵装置性能曲线马鞍形区的特点及应用 |
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| 引用本文： | 吉冬涛,陆伟刚,陆林广,徐磊,刘军,施伟.轴流泵装置性能曲线马鞍形区的特点及应用[J].排灌机械工程学报,2021,39(11):1081-1086. |
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| 作者姓名： | 吉冬涛 陆伟刚 陆林广 徐磊 刘军 施伟 |
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| 作者单位： | 1. 扬州大学水利科学与工程学院, 江苏 扬州 225009; 2. 南水北调东线江苏水源有限责任公司, 江苏 南京 210019 |
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| 摘 要： | 根据南水北调水泵模型同台测试资料和中水北方水力模型通用试验台的泵装置模型试验资料,对具有代表性的4个轴流泵装置与相应轴流泵扬程-流量性能曲线的马鞍形区特点进行对比分析.结果发现:轴流泵装置扬程-流量性能曲线的马鞍形区只有1个马鞍形,而相应的轴流泵扬程-流量性能曲线有2个马鞍形,第一马鞍形鞍底扬程与泵装置的鞍底扬程接近,而第二马鞍形鞍底扬程则明显低于泵装置的鞍底扬程;透明泵装置模型试验的流态观察结果表明,轴流泵扬程-流量性能曲线马鞍形区出现的第二鞍底是在水泵模型性能测试时受二次回流影响而产生的测量假象.在低扬程泵站水泵选型考虑泵站最高运行扬程的控制扬程时,应将轴流泵扬程-流量性能曲线马鞍形区的第一鞍底扬程作为控制扬程,如有相近泵装置模型试验的扬程-流量性能曲线,则可参考相关泵装置模型试验资料提供的鞍底扬程.
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| 关 键 词： | 轴流泵 泵装置 扬程-流量性能曲线 马鞍形区 二次流 |
| 收稿时间： | 2020-02-09 |
Characteristics and application of saddle-shaped zone in performance curve of axial-flow pump system |
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| JI Dongtao,LU Weigang,LU Linguang,XU Lei,LIU Jun,SHI Wei.Characteristics and application of saddle-shaped zone in performance curve of axial-flow pump system[J].Journal of Drainage and Irrigation Machinery Engineering,2021,39(11):1081-1086. |
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| Authors: | JI Dongtao LU Weigang LU Linguang XU Lei LIU Jun SHI Wei |
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| Institution: | 1. School of Hydraulic Science & Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2. The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co. Ltd., Nanjing, Jiangsu 210019, China |
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| Abstract: | Based on the test data of the pump model for the South to North Water Diversion Project and the model test data of pump system completed in the test rig of BeiFang Investigation, Design & Research CO, the characteristics of the saddle shaped zone of the head-flow performance curve of four typical axial flow pump systems and the corresponding axial flow pumps were analyzed and compared. It is found that there is only one saddle shaped in the saddle shaped zone of the head-flow perfor mance curve of the axial flow pump system, while there are two saddle shaped head flow performance curve of the corresponding axial flow pump. The bottom head of the first saddle is close to the saddle bottom head of the pump system, while the bottom head of the second saddle is significantly lower than that of the saddle bottom head of the pump system. The experimental results of the flow pattern in the model test of the transparent pump system show that the second saddle bottom in the saddle shaped zone of the head-flow performance curve of the axial flow pump is a false appearance caused by the influence of the secondary backflow during the test measurement for the performance of pump model. The first saddle bottom head of the head flow performance curve of the axial-flow pump should be referred to the control head of the highest operating head of a pumping station with low lift for pump selection. If there is a model test data of the relevant pump system, the saddle bottom head of head-flow perfor mance curve of similar pump system model test might be referred as the control head. |
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| Keywords: | axial flow pump pump system head-flow performance curve saddle shaped zone secondary flow |
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