| 轴流泵多工况优化设计及效果分析 |
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| 引用本文： | 石丽建,汤方平,刘超,谢荣盛,谢传流,孙丹丹.轴流泵多工况优化设计及效果分析[J].农业工程学报,2016,32(8):63-69. |
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| 作者姓名： | 石丽建 汤方平 刘超 谢荣盛 谢传流 孙丹丹 |
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| 作者单位： | 1. 扬州大学水利与能源动力工程学院,扬州,225100;2. 徐州市水利建筑设计研究院,徐州,221000 |
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| 基金项目： | 国家自然科学基金项目（51376155）；十二五农村领域科技计划项目（2012BAD08B03-2）；江苏高校优势学科建设工程资助项目（PAPD）；江苏省科研创新计划项目（KYLX15_1365） |
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| 摘 要： | 为了提高轴流泵非设计工况的运行效率,拓宽轴流泵高效区范围,对轴流泵进行多工况优化设计。结合轴流泵段的模型试验,采用数值模拟手段和数值优化技术,改变叶轮的几何设计参数。对轴流泵叶片进行参数化建模,再对轴流泵叶轮结果进行泵段数值模拟。最后以轴流泵段3个流量工况点的加权平均效率最高,扬程为约束条件,改变轴流泵叶轮的设计参数,对轴流泵段进行多工况优化设计。研究结果表明:优化后轴流泵段效率曲线较初始泵段明显变宽,其中小流量工况点效率提高约2.6%,设计工况点效率提高约0.5%,大流量工况点效率提高最多,约7.4%,而对于扬程变化范围较小,各工况点扬程均能满足运行要求,大大降低了运行成本,缩短了优化设计的周期。同时采用CFD计算的学科分析方式,结合试验研究的手段取代人工凭经验的优化方式,证实了轴流泵段多工况优化设计的可靠性、高效性。该研究将为泵站的高效运行和轴流泵的多工况优化设计提供参考。
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| 关 键 词： | 泵 优化 计算机仿真 轴流泵段 多工况 试验分析 |
| 收稿时间： | 9/7/2015 12:00:00 AM |
| 修稿时间： | 2016/2/17 0:00:00 |
Optimization design and effect analysis of multi-operation conditions of axial-flow pump device |
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| Shi Lijian,Tang Fangping,Liu Chao,Xie Rongsheng,Xie Chuanliu and Sun Dandan.Optimization design and effect analysis of multi-operation conditions of axial-flow pump device[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(8):63-69. |
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| Authors: | Shi Lijian Tang Fangping Liu Chao Xie Rongsheng Xie Chuanliu and Sun Dandan |
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| Institution: | 1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225100, China;,1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225100, China;,1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225100, China;,1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225100, China;,1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225100, China; and 2. Institute of Water Conservancy Works Design of Xuzhou, Xuzhou 221000, China; |
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| Abstract: | Abstract: The flow units of pump device will produce a bad flow regime when the axial-flow pump runs under off-design condition. The paper uses the numerical simulation and numerical optimization techniques, changes the geometric design parameters of axial-flow impeller, and carries out the optimization design of multi-operation conditions of axial-flow pump device. The optimization design based on pump device experiment analysis aims to improve the efficiency of operation under off-design conditions, broaden the scope of the efficiency of pump device, and reduce the operating cost of pump station. Firstly, this paper performs the parametric modeling of axial-flow impeller, and uses fewer design parameters to control the shape of pump blades by FORTRAN. According to the design condition to design an axial-flow impeller with high efficiency, and design the guide vane based on the design condition and the impeller. Use the impeller, the guide vane, and the standard inlet and outlet pipe to calculate the hydraulic performance of axial-flow pump device. Then do the experiment of the pump device to verify the accuracy and reliability of the numerical simulation of the pump device. Lastly, this paper carries out the optimization design of multi-operation conditions of axial-flow pump device. The design flow is 360 L/s, the small flow is 300 L/s and the large flow is 420 L/s, and the 3 flow conditions is chosen as the multi-operation conditions. Change the design parameters of axial-flow impeller, select the weighted average efficiency of pump device as the optimization object and the head of each condition as the constraint, and carry out the optimization design of multi-operation conditions of axial-flow pump device. For each design parameter, every change corresponds to a complete numerical simulation of pump device. Last but not least, this article does the internal flow field analysis of pump before and after optimization. The analysis mainly includes the streamline comparison of the different flow conditions for the outlet pipe, and the pressure comparison of the different flow conditions in the outlet of the impeller; besides, the NPSH(net positive suction head) is compared before and after optimization. The optimization results show that the optimized high efficiency range of axial-flow pump device is widened obviously compared to the initial pump device. The efficiency of small flow condition is increased by about 2.6%, the efficiency of design flow condition is increased by about 0.5%, and the efficiency of large flow condition is increased by about 7.4%, which is the most. As to the head of the axial-flow pump device, it is little changed, and can also meet the operation requirement. The optimized pump device can greatly reduce the operation cost of pump station, and the optimization design method of multi-operation conditions of axial-flow pump device can greatly shorten the design cycle. From the comparison of streamline and pressure before and after optimization, it can be seen that the optimized streamline is smoother and the pressure distribution is more reasonable. And the NPSH is similar, and does not become worse. This paper adopts the computational fluid dynamics (CFD) simulation as the subject analysis method, which is combined with experimental study and replaces artificial way of optimization design based on experience, and proves the reliability and efficiency of the optimization design of multi-operation conditions of axial-flow pump device. |
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| Keywords: | pumps optimization computer simulation axial-flow pump device multi-operation conditions experiment analysis |
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