Uncertainty Evaluation for Flow Rate Measurements of Hydraulic Turbines Based on the Ultrasonic Transit Time Method

LIU Fazhan; ZHAO Lin; LIU Yuan; ZHEN Wenxi; FENG Tiecheng; GOU Xiaojun; DU Jianjun

doi:10.12338/j.issn.2096-9015.2021.0570

Volume 66 Issue 2

Feb. 2022

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Article Navigation > Metrology Science and Technology > 2022 > 66(2): 33-37

LIU Fazhan, ZHAO Lin, LIU Yuan, ZHEN Wenxi, FENG Tiecheng, GOU Xiaojun, DU Jianjun. Uncertainty Evaluation for Flow Rate Measurements of Hydraulic Turbines Based on the Ultrasonic Transit Time Method[J]. Metrology Science and Technology, 2022, 66(2): 33-37. doi: 10.12338/j.issn.2096-9015.2021.0570

Citation:

LIU Fazhan, ZHAO Lin, LIU Yuan, ZHEN Wenxi, FENG Tiecheng, GOU Xiaojun, DU Jianjun. Uncertainty Evaluation for Flow Rate Measurements of Hydraulic Turbines Based on the Ultrasonic Transit Time Method[J]. Metrology Science and Technology, 2022, 66(2): 33-37. doi: 10.12338/j.issn.2096-9015.2021.0570

Citation:

LIU Fazhan, ZHAO Lin, LIU Yuan, ZHEN Wenxi, FENG Tiecheng, GOU Xiaojun, DU Jianjun. Uncertainty Evaluation for Flow Rate Measurements of Hydraulic Turbines Based on the Ultrasonic Transit Time Method[J]. Metrology Science and Technology, 2022, 66(2): 33-37. doi: 10.12338/j.issn.2096-9015.2021.0570

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Uncertainty Evaluation for Flow Rate Measurements of Hydraulic Turbines Based on the Ultrasonic Transit Time Method

doi: 10.12338/j.issn.2096-9015.2021.0570

1.
Electric Power Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730070, China
2.
Liujiaxia Hydropower Plant of State Grid Gansu Electric Power Company, Linxia 731600, China
3.
National Institute of Metrology, Beijing 100029, China

Accepted Date: 2021-12-08

Available Online: 2022-02-15

Publish Date: 2022-02-18

Abstract

Abstract

The flow rate is the key parameter for evaluating the absolute efficiency of a hydraulic turbine. This paper reviews typical turbine flow measurement methods and studies the uncertainty evaluation for the ultrasonic transit time method. The total station was used to establish the accurate 3D model of the pipeline, and the geometric parameters were calibrated by measuring the relative position between the probe and the pipeline, then good uncertainty results were obtained. With a reasonable estimation of the ultrasonic transit time and flow rate integral modal, the uncertainty evaluation method for flow rates of super large calibers is given.
- hydraulic turbine,
- efficiency evaluation,
- ultrasonic flowmeter,
- uncertainty,
- ultrasonic transit time method

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References(17)

References

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