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Optimization of flow integration algorithm for hydraulic turbine units using current meter method
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DOI：10.1016/j.flowmeasinst.2026.103308.png)
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Abstract
En 中文
As the core energy-conversion equipment in hydropower stations, hydraulic turbines' operational efficiency directly impacts energy supply stability and economy. In their absolute efficiency tests, accurate flow measurement is critical for determining unit efficiency, optimizing station operating parameters, and enhancing power generation performance. Addressing the flow integration accuracy issue with the current meter method in absolute efficiency tests, this paper first describes the velocity measurement technology and integration principles, proposing a curved surface interpolation integration method to reconstruct the cross-sectional flow field distribution and calculate the flow rate. A model is constructed based on a hydropower station's test parameters, and computational fluid dynamics (CFD) technology is employed to obtain simulated flow field parameters. Four integration algorithms-average flow velocity, double graphical, curved surface interpolation, and power-law difference methods-are utilized to calculate the flow rates of both experimental and simulated flow fields to compare their accuracy and characteristics. Finally, based on the high accuracy and stability of the average flow velocity and curved surface interpolation methods, a linear mapping relationship between the simulated flow rates and the results of these two algorithms is established to correct the experimental results. This study compares the accuracy of different integration algorithms, providing a basis for algorithm selection under various flow field conditions in turbine efficiency tests. The proposed curved surface interpolation method demonstrates an average integration error of 0.0925% in simulated flow fields. The implemented linear correction strategy effectively reduces the systematic uncertainty of flow integration calculations, aligning the corrected flow rates more closely with the real flow fields. This is of significant value for enhancing the precision of unit performance evaluation, optimizing energy conversion efficiency, and ensuring the economic and safe operation of hydropower systems.
Keywords:
Current meter method
Flow calculation
Integration algorithm
Computational fluid dynamics
Journal
IF:
2.7
Papers:
220
Citations:
4.2K