| 蜗壳出口倾斜对混流泵作透平的性能影响 |
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| 引用本文： | 杨孙圣,戴韬,陈振,邵珂,王凯.蜗壳出口倾斜对混流泵作透平的性能影响[J].排灌机械工程学报,2020,38(5):451-456. |
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| 作者姓名： | 杨孙圣 戴韬 陈振 邵珂 王凯 |
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| 作者单位： | 江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013;格兰富水泵(上海)有限公司,上海201106 |
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| 基金项目： | 国家自然科学基金资助项目(11602097);江苏高校优势学科建设项目。 |
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| 摘 要： | 为了提高混流泵作透平工作效率,揭示蜗壳出口倾斜后对透平性能的影响,在不改变其他过流部件几何参数的情况下,利用试验研究与数值模拟相结合的方法,分别模拟蜗壳出口倾斜角度为0°和26°的透平模型,探讨蜗壳出口倾斜对混流泵作透平性能的影响规律.结果表明:蜗壳出口倾斜情况下透平叶轮流道流线分布更加均匀,二次流旋涡现象较径向出口蜗壳的混流泵作透平有明显的减弱;在设计流量(120 m3/h)工况下,混流泵作透平蜗壳出口倾斜后其效率、水头、轴功率分别提升了5.2%,10.41%,17.64%;蜗壳出口倾斜后叶轮和尾水管内部水力损失减小,蜗壳内部水力损失略有增加,总水力损失为减小;试验结果与数值模拟的外特性预测结果变化趋势一致,验证了数值模拟的准确性.该研究丰富了液力透平设计方法,可为混流泵作透平设计提供一定的参考.
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| 关 键 词： | 混流泵作透平 蜗壳 出口倾斜 数值模拟 |
| 收稿时间： | 2018-10-17 |
Influence of volute tilted outlet on performance ofmixed-flow pump as turbine |
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| YANG Sunsheng,DAI Tao,CHEN Zhen,SHAO Ke,WANG Kai.Influence of volute tilted outlet on performance ofmixed-flow pump as turbine[J].Journal of Drainage and Irrigation Machinery Engineering,2020,38(5):451-456. |
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| Authors: | YANG Sunsheng DAI Tao CHEN Zhen SHAO Ke WANG Kai |
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| Institution: | 1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Grundfos Pumps(Shanghai)Co. Ltd., Shanghai 201106, China |
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| Abstract: | Two volutes of a mixed-flow pump with specific speed of 288 were designed respectively with horizontal and tilted inlets to reveal their influences on the performance and improve the efficiency when working as turbine,i.e.pump as turbine(PAT).In the design,the volute inlet(outlet for PAT)orientation was rotated 26°clockwise while the rest geometrical parameters remained unchanged.In this study,experimental and numerical simulation methods have been adopted.After the volute inlet is til-ted,the streamlines in the impeller is more evenly distributed,and the secondary flow and vortex phenomena are significantly suppressed compared with the volute with horizontal inlet.Under the design flow condition(Q=120 m 3/h),compared with the PAT with horizontal outlet(inlet for pump),the shaft power,head and efficiency of the PAT with tilted outlet are increase by 17.64%,10.41%and 5.2%,respectively.After the volute outlet is tilted in the PAT,the hydraulic loss in both the impeller and the draft tube is reduced,even though the loss in the volute rises slightly,the total hydraulic loss is declined.The experimental results are consistent with the data of numerical simulation,leading to a validated accuracy of numerical simulation.This study can enrich design methods of PAT and can providea reference for hydraulic design of mixed-flow pump used as PAT. |
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| Keywords: | mixed-flow pump as turbine volute tilted outlet numerical simulation |
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