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| Prediction of pump′s complete characteristic curves and its influence on further numerical analysis |
| HUANG Ya, ZHOU Jianxu* |
| College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China |
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Abstract To evaluate the hydraulic transition characteristics of the pumping system, and conduct reasonable and effective water hammer protection, a newton interpolation algorithm-based prediction me-thod for the complete characteristic curve of the pump was proposed based on the Suter curves of the pump characteristics, and a numerical transformation method that uses the basic characteristic curve of the pump to correct the complete characteristic curve of the pump was further given. The comparison analysis with the commonly used methods for predicting and fitting the complete characteristic curve of water pumps was conducted, and the application analysis in the calculation of the transition process of the pumping system was introduced. The results show that the newton interpolation algorithm-based prediction method for pump′s complete characteristic curves is convenient for practical application, and this method flexibly adapt to the supplement of basic fitting data. Moreover, the predicted Suter curves of the pump is reasonable and reliable. These Suter curves can improve the accuracy of working para-meters as the pump system is in steady-state operation condition, and accurately provide the flow cha-racteristics and energy characteristics of the pump under complete conditions to meet the accuracy requirements for hydraulic tran-sient analysis.
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Received: 01 August 2020
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