| 引用本文: | 胡秋瑾,汤方平,石丽建,等.大型立式轴流泵装置水力模型比选分析[J].灌溉排水学报,0,():-. |
| Hu Qiujin,Tang Fangping,Shi Lijian,et al.大型立式轴流泵装置水力模型比选分析[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】研究水泵选型方法的合理性。【方法】基于雷诺时均N-S方程和RNG k-ε紊流模型，以立式轴流泵装置为研究对象，采用传统选型方法和等扬程加大流量的选型方法，运用CFD软件对两种水力模型的泵装置进行全流道数值计算，增加泵装置外特性和不同工况下导叶流线分布作为分析水泵选型方法的参考指标。然后对水力模型选择的可靠性进行模型试验验证。【结果】传统选型方法所选的模型，泵装置高效区扬程偏高，但考虑到后面涵洞损失，可以应用在该泵站中。等扬程加流量的选型方法，高效区合理，但最高扬程不能满足要求。数值计算与模型试验的结果对比最大误差处小于5%，整体性能曲线的趋势相对良好，数值计算对泵装置的模拟合理可靠。【结论】选用等扬程加大流量的选型方法可保证轴流泵最高效率点与设计点接近，在实际工程中，需兼顾各个特征扬程。 |
| 关键词: 水泵选型;立式轴流泵装置;数值模拟;模型试验 |
| DOI： |
| 分类号:TH312 |
| 基金项目:国家自然科学(51376155),江苏省自然科学(BK20190914)；江苏省高校自然科学研究项目(19KJB570002)；扬州市自然科学(YZ2018103),江苏省水利科技项目(2017031),江苏省高校优势学科建设项目(PAPD)。 |
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| Hydraulic Model Comparison Analysis of Large Vertical Axial Flow Pumps |
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Hu Qiujin1, Tang Fangping1, Shi Lijian1, Shang Xiaojun2, Wang Chaofei1, Zhou Ying1
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1.School of water conservancy science and engineering, Yangzhou University;2.Jiangsu Taihu District Water Conservancy Project Management Office
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| Abstract: |
| 【Objective】Selection of vertical axial flow pump is an important content in the research of water pump technology transformation. Reasonable selection method has practical significance for efficient, stable and safe operation of pumping stations. This paper is for study the rationality of the pump selection method. 【Method】Based on the Renault time-averaged NS equation and RNG k-ε turbulence model, the vertical axial flow pump device is used as the research object. The traditional selection method and the method of increasing the flow with equal head are used. The pump device performs numerical calculation of the full flow channel, and the external characteristics of the pump device and the guide vane flow line distribution under different operating conditions are added as a reference index for analyzing the pump selection method. The reliability of the hydraulic model selection is then verified by model tests. 【Results】 The model selected by the traditional selection method has a high head in the high-efficiency zone of the pump device, but considering the loss of the culvert at the back, it can be applied to the pumping station. The selection method of equal head and flow rate is reasonable in the high efficiency area, but the maximum head cannot meet the requirements. The maximum error between the numerical calculation and the results of the model test is less than 5%, and the trend of the overall performance curve is relatively good. The numerical calculation is reasonable and reliable for the simulation of the pump device. 【Conclusion】 The selection method of increasing the flow rate by equal heads can ensure that the highest efficiency point of the axial flow pump is close to the design point. In actual engineering, it is necessary to take into account each characteristic head. |
| Key words: Pump selection; vertical axial pump device; numerical simulation; model test |
