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Journal articles on the topic 'Francis-Turbine'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kyi, Pyar Oo, Zar Nyunt Khaing, and Cho Cho Theik Ei. "Design Calculation of 40 MW Francis Turbine Runner." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 635–39. https://doi.org/10.5281/zenodo.3590901.

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A water turbine is one of the most important parts to generate electricity in hydroelectric power plants. The generation of hydroelectric power is relatively cheaper than the power generated by other sources. There are various types of turbines such as Pelton Turbine, Cross flow Turbine, and Francis Turbine which are being used in Myanmar. In this paper, one of the hydroelectric power plant which is used Vertical Francis Turbine type. The Francis turbine is one of the powerful turbine types. Francis Turbine is a type of water turbine that was developed by James Bicheno Francis. Hydroelectric P

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2

Chen, Zhenmu, and Young-Do Choi. "Suppression of cavitation in the draft tube of Francis turbine model by J-Groove." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 9 (2018): 3100–3110. http://dx.doi.org/10.1177/0954406218802310.

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Cavitation is recognized as a phenomenon that can cause serious damage to a hydro turbine and can reduce its performance when operating at off-design point. This is an undesired phenomenon, which needs to be improved. In order to suppress the cavitation in the Francis turbine draft tube, a technology with grooved draft tube named J-Groove is introduced in the Francis turbine. The Francis turbine performance and the internal flow characteristic are investigated both with and without J-Groove installation by the experimental method and numerical simulation. Visualization was used to capture the

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3

Ghimire, A., P. Sapkota, A. Kayastha, B. S. Thapa, Y. D. Choi, and Y. H. Lee. "Experimental Analysis of a Simplified Francis Turbine." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012014. http://dx.doi.org/10.1088/1755-1315/1037/1/012014.

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Abstract Introduction of Francis turbine in Nepalese micro hydropower project has been considered to uplift the turbine manufacturing ability of the local turbine manufacturers, along with the rejuvenation of the micro hydro sector in Nepal. The Francis turbine used in this study was designed for a Micro hydropower plant in Nepal. The design has been simplified in order to facilitate the local manufacturing of the turbine. The locally manufactured Francis turbine has been tested at Turbine Testing Laboratory under variable rotational speed and discharge. The performance of the Francis turbine

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4

Jian, Bin, Weiqiang Zhao, Rongfu Guo, Shuping Chen, Ming Xia, and Zhengwei Wang. "Application of Multi-Dimensional Hill Chart in the Condition Monitoring and Cost Estimation of the Francis Turbine Unit." Processes 12, no. 6 (2024): 1243. http://dx.doi.org/10.3390/pr12061243.

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With a large-range-operation head, the Francis turbine unit is the most widely used type of hydraulic turbine in the world. The general range of the Francis turbine is 20–700 m. Because of this, the operating stability of the Francis turbine needs to be focused on. In this paper, a multi-dimensional hill chart is applied to a low-head Francis turbine unit to describe its vibration characteristics. Firstly, a field test was conducted on the unit in order to obtain vibration data under different operating conditions. Secondly, the condition indicators were calculated and extracted from the exper

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5

Yang, Jing. "Analysis on Hydraulic Design of Runner Blades of Francis Turbine." Studies in Social Science Research 4, no. 4 (2023): p175. http://dx.doi.org/10.22158/sssr.v4n4p175.

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Francis turbine is the most widely used model in hydropower station, and the hydraulic design of runner blades affects the efficiency of the unit. This paper discusses how to complete the hydraulic design of Francis turbine runner blades according to the given parameters. In hydraulic design of Francis turbine runner, firstly, the structural scheme is determined according to the given parameters. On the basis of referring to excellent hydraulic model, a Francis turbine runner blade is designed according to the given head. By analyzing and calculating the data, the geometric parameters and axia

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6

Zhou, Kangwu, Xingxing Huang, Tengfei Zhang, and Zhengwei Wang. "Research on Modal Behavior of Large Francis Turbine Runner." Journal of Physics: Conference Series 2747, no. 1 (2024): 012050. http://dx.doi.org/10.1088/1742-6596/2747/1/012050.

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Abstract The water-added-mass can affect the modal behavior of the Francis turbine runner largely. The sealing rings in the band-chamber and the crown-chamber outside of the runner are utilized to prevent leakage of water around the Francis turbine. The sealing rings and the chambers filled with water can also affect the modal behavior of the turbine. When the turbine runner operates in the power plant at various operating conditions, the seal clearances of the band-chamber and the crown-chamber filled with water may change the modal behavior of the large Francis turbine runner. Firstly, the 3

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7

Zhao, Weiqiang, Jianhua Deng, Zhiqiang Jin, Ming Xia, Gang Wang, and Zhengwei Wang. "A Comparative Analysis on the Vibrational Behavior of Two Low-Head Francis Turbine Units with Similar Design." Water 17, no. 1 (2025): 113. https://doi.org/10.3390/w17010113.

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With the requirement of flexible operation of hydraulic turbine units, Francis turbine units have to adjust their output into extended operating ranges in order to match the demand of the power grid, which leads to more off-design conditions. In off-design conditions, hydraulic excitation causes excessive stress, pressure pulsation, and vibration on the machines. Different designs of Francis turbines cause different hydraulic excitations and vibrational behaviors. To conduct better condition monitoring and fault prognosis, it is of paramount importance to understand the vibrational behavior of

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8

Zhang, Si Qing, Guo Hua Ma, Yun Long Zhang, and Dong Wang. "Hydraulic Turbine Blades Modeling Based on Two-Dimensional Wooden Patterns." Advanced Materials Research 860-863 (December 2013): 1521–24. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.1521.

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There are many difficulties to design, processing and research on numerical simulation for Francis turbine because of the complexity of blade shape and the difficulty of solid modeling. Based on two-dimensional wooden patterns of Francis turbine blades, this article aims to complete blades three-dimensional modeling for Francis turbine runner with long and short blades by means of Pro-E software which has powerful 3D modeling function. After comparing three kinds of available methods to generate blade across section which provided by Pro-E, finally completed blades three-dimensional modeling b

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9

Mukherjee, Arnab, Subodh Khullar, Mohammad Zehab Ud Din, Chandra Shekhar Pant, and Arun Kumar. "A comparative analysis of CFD methodologies to predict the performance of Francis turbine." IOP Conference Series: Earth and Environmental Science 1411, no. 1 (2024): 012009. https://doi.org/10.1088/1755-1315/1411/1/012009.

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Abstract A Francis turbine’s flow characteristics strongly depend on the operating conditions. Accurately predicting the flow field within a turbine unit is challenging due to complex flow phenomena, such as separation around the turbine blades, pressure variations within the runner, and swirling flows in the draft tube. Various CFD methodologies can be employed to predict turbine performance. The present work evaluates the reliability of different CFD simulation methodologies in predicting turbine performance, focusing on the sensitivity of different turbulence models, grid types, and modelin

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10

Mirza Umar, Baig, Xingxing Huang, and Zhengwei Wang. "Experimental Flow Performance Investigation of Francis Turbines from Model to Prototype." Applied Sciences 14, no. 17 (2024): 7461. http://dx.doi.org/10.3390/app14177461.

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Investigating the flow performance of Francis turbines from model to prototype is a complex but essential process for ensuring reliable and efficient turbine operation in hydropower plants. It ensures that Francis turbine designs operate efficiently under various operating conditions, extending from laboratory reduced-scale models to full-scale prototype installations. In this investigation, a Francis turbine model was tested under different operating conditions, and its properties were measured, including torque, hydraulic efficiency, power output, cavitation coefficient, rotational speed, fl

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11

Salehi, Saeed, and Håkan Nilsson. "OpenFOAM for Francis Turbine Transients." OpenFOAM® Journal 1 (November 17, 2021): 47–61. http://dx.doi.org/10.51560/ofj.v1.26.

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The flexibility and fast responsiveness of hydropower systems make them a reliable solution to overcome the intermittency of renewable energy resources and balance the electrical grid. Therefore, investigating the complex flow fields during such operation is essential to increase the reliability and lifetime of future hydropower systems. The current article concerns the utilization of OpenFOAM for the numerical study of Francis turbines during transient load change operations. The details of employed models and numerical schemes are thoroughly explained. The Laplacian smoothing algorithm is ap

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12

Obretenov,, V. S. "Modernization of Francis Water Turbine." Journal of the Mechanical Behavior of Materials 11, no. 5 (2000): 365–72. http://dx.doi.org/10.1515/jmbm.2000.11.5.365.

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13

Huang, Xingxing, Hua Ou, Hao Huang, Zhengwei Wang, and Gang Wang. "Flow-Induced Stress Analysis of a Large Francis Turbine Under Different Loads in a Wide Operation Range." Applied Sciences 14, no. 24 (2024): 11782. https://doi.org/10.3390/app142411782.

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Francis turbines, being widely used in hydropower plants, operate under different loads which significantly affect their hydraulic characteristics and structural dynamics. It is essential to carry out the flow-induced dynamics analysis of the large prototype Francis turbines under different loads in a wide load operation range to optimize the hydraulic performance, ensure structural reliability, and prevent mechanical failure. This work analyzes the flow-induced dynamics of a large Francis turbine prototype with a rated power of 46 MW. Computer-aided design (CAD) models of the Francis turbine

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14

Lama, Ram, Saroj Gautam, Hari Prasad Neopane, Biraj Singh Thapa, Sailesh Chitrakar, and Ole Gunnar Dahlhaug. "Recent developments in the optimization of Francis turbine components for minimizing sediment erosion." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012009. http://dx.doi.org/10.1088/1755-1315/1037/1/012009.

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Abstract Sediment erosion in hydraulic turbines are severe in case of hydropower plants operating in Himalayan Rivers of Nepal. Francis turbine components are heavily eroded while hard particles as quartz flow along with water through the water conduit in power plant. In Francis turbines, the runner blades where significant portion of hydraulic energy converts in mechanical energy are heavily eroded. This is due to complexity in fluid flow while operated at different operating conditions with sediment contained water. Conventional design of Francis turbines has overlooked on the effects of sed

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15

Gat, Shrenik B. "Modal Analysis of Francis Turbine Blade Using Composite Material." International Journal Of Mechanical Engineering And Information Technology 05, no. 04 (2017): 1855–60. http://dx.doi.org/10.18535/ijmeit/v5i4.01.

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16

Wang, Shanlei, Shujiao Pang, Jiawei Ding, Ming Wang, and Zhenmu Chen. "The effect of damping grid on vortex rope and pressure fluctuation in the draft tube of Francis turbine." Journal of Physics: Conference Series 2707, no. 1 (2024): 012062. http://dx.doi.org/10.1088/1742-6596/2707/1/012062.

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Abstract The pressure fluctuation caused by vortex bands is the main cause of vibration in Francis turbines under off-design conditions. Therefore, adopting effective strategies to affect the vortex rope and suppress the pressure fluctuation caused by the vortex rope is great significance for the stable operation of the Francis turbine. In this study, the damping grid were proposed to optimize the flow state of the fluid in the draft tube, and unsteady numerical simulations were performed to determine their mechanism of action. And a detailed analysis was conducted on the test results to under

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17

Wang, Weiyu, Qijuan Chen, Xing Liang, Xuhui Yue, and Jinzhou Dou. "A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine." Mathematical Problems in Engineering 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/3494785.

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The pressure fluctuation has multiple influence on the steady operation of Francis turbine, and the impact degree varies with the operation condition. In this paper, for the analysis of pressure fluctuation in the Francis turbine, a novel feature extraction method of multidimensional frequency bands energy ratio is proposed based on Hilbert Huang Transform (HHT). Firstly, the pressure fluctuation signal is decomposed into intrinsic mode functions (IMFs) by EEMD. Secondly, the Hilbert marginal spectrum is utilized to analyze the frequency characteristics of IMFs. Then, according to the inner fr

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18

Ji, Lei, Lianchen Xu, Yuanjie Peng, et al. "Experimental and Numerical Simulation Study on the Flow Characteristics of the Draft Tube in Francis Turbine." Machines 10, no. 4 (2022): 230. http://dx.doi.org/10.3390/machines10040230.

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The flow characteristics of the draft tube of a Francis turbine have a significant influence on turbine stability. Numerical simulations were performed for a Francis turbine under three different output conditions of 20%, 100%, and 120% at the rated and maximum heads. Laser Doppler velocimetry (LDV) tests were conducted to test the flow characteristics of the draft tube of the Francis turbine model. The flow characteristics in the draft tube, the mechanism of the flow characteristics change, and the effect of the opening on the vortex rope were analyzed. The results showed that the large and i

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19

Hu, Ying, and Kun Wang. "Three-Dimensional Unsteady Simulation in a Water Turbine." Advanced Materials Research 655-657 (January 2013): 227–30. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.227.

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This paper introduces the 3D numerical simulation of unsteady turbulent flow in the entire flow passage of a water turbine model with CFD technology. A new and available method for the design of a Francis turbine has been explored. The boundary conditions have been implemented based on the 3D averaged N-S equations. The governing equations are discreted on space by the finite volume method and on time step by the finite difference method. The 3D unsteady turbulent flow in an entire Francis turbine model is calculated successfully using the CFX-TASCflow software and RNG k-εturbulence model. Tra

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20

Laín-Beatove, Santiago, Manuel J. García.Ruiz, Brian Quintero-Arboleda, and Santiago Orrego-Bustamante. "CFD Numerical simulations of Francis turbines." Revista Facultad de Ingeniería Universidad de Antioquia, no. 51 (March 20, 2013): 31–40. http://dx.doi.org/10.17533/udea.redin.14917.

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In this paper the description of the internal flow in a Francis turbine is addressed from a numerical point of view. The simulation methodology depends on the objectives. On the one hand, steady simulations are able to provide the hill chart of the turbine and energetic losses in its components. On the other hand, unsteady simulations are required to investigate the fluctuating pressure dynamics and the rotor-stator interaction. Both strategies are applied in this paper to a working Francis turbine in Colombia. The employed CFD package is ANSYS-CFX v. 11. The obtained results are in good agree

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21

Xu, Lianchen, Xiaohui Jin, Zhen Li, Wanquan Deng, Demin Liu, and Xiaobing Liu. "Particle Image Velocimetry Test for the Inter-Blade Vortex in a Francis Turbine." Processes 9, no. 11 (2021): 1968. http://dx.doi.org/10.3390/pr9111968.

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Hydropower units are usually operated in non-design conditions because of power grid requirements. In a partial-load condition, an inter-blade vortex phenomenon occurs between the runner blades of a Francis turbine, causing pressure pulsation and unit vibration, which hinder the safe and stable operation of power stations. However, the mechanism through which the inter-blade vortex generation occurs is not entirely clear. In this study, a specific model of the Francis turbine was used to investigate and visually observe the generation of the blade vortex in Francis turbines in both the initial

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22

Ahmad, Sanaullah, Mohsin Tahir, Asif Nawaz, Ghufran Ullah, Zeeshan Najam Khan, and Sheeraz Ahmed. "DESIGN AND ANALYSIS OF HYDRO TURBINES FOR ELECTRICAL POWER GENERATION." Kashf Journal of Multidisciplinary Research 1, no. 12 (2024): 153–68. https://doi.org/10.71146/kjmr162.

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In designing a hydropower plant, the design of turbine type depends on the head and water flow. Researchers suggest that Axial/Propeller turbines can perform efficiently in lower heads because of their high specific speeds, Francis turbines can perform efficiently in medium to medium/high heads with high water discharge and medium specific speeds whereas Pelton turbines can perform efficiently in high heads with low water discharge and low specific speeds. In this paper the output performance of Axial/ Propeller, Francis and Pelton turbines are designed, analyzed and compared using TURBNPRO so

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23

Umar, Baig Mirza, Jingwei Cao, and Zhengwei Wang. "EXPERIMENTAL AND CFD SIMULATION VALIDATION PERFORMANCE ANALYSIS OF FRANCIS TURBINE." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012003. http://dx.doi.org/10.1088/1755-1315/1037/1/012003.

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Abstract Francis Turbines are designed to Extract hydraulic power as much as possible in hydro power plant stations. Performance analysis and selecting design of hydraulic turbines are two very essential aspects of any hydro power project which ensure the economical and efficient functioning of these hydro power plants.CFD simulation can provide us insight into field flow characteristics which will help us understand the design parameter and development of Francis turbine. The performance analyzed in different operating conditions with the help of numerical simulation and experimental testing.

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24

Lu, Lei, Li Da Zhang, Jing Yang, Long Zhou, and Zhi Jian Xu. "Cause Research about Vibration and Noise Caused by Channel Vortices at High Load in Francis Turbine." Advanced Materials Research 860-863 (December 2013): 1569–73. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.1569.

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A low head hydropower station is in the southwest of China, its Francis turbine ran well at a rated power and rated net head, but the turbine produced severe abnormal vibration and noise at higher head than the rated head, full load and overload. By analyzing, characteristic points on vibration conditions are inside the area of channel vortices on runner performance curve. CFD analysis indicates that unstable vortices exist between runner blades. The two results demonstrate that the vibration and noise of Francis turbine are caused by runner channel vortices at higher head than the rated head,

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25

Shrestha, Kushal, Pawan Lal Bijukchhe, Hari Prasad Neopane, Sailesh Chitrakar, and Bhola Thapa. "Design and Performance study of Francis turbine for high head applications." Journal of Physics: Conference Series 2854, no. 1 (2024): 012086. http://dx.doi.org/10.1088/1742-6596/2854/1/012086.

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Abstract Francis Turbines are widely employed globally for their adaptability and operational versatility across a broad range of water flow rates and pressure heads. This study explores the design and optimization of a Francis turbine configured for exceptionally high heads, specifically targeting a design head of 700 m. Traditionally, Pelton turbines are favoured for such high heads, but this study investigates the viability of Francis turbines in this range. Through comprehensive testing, including the development of hill chart diagrams to evaluate performance under various conditions, the

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26

LIAO, Weili. "Unsteady Flow Analysis of Francis Turbine." Journal of Mechanical Engineering 45, no. 06 (2009): 134. http://dx.doi.org/10.3901/jme.2009.06.134.

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27

LUO, Xingqi. "Steady Flow Analysis of Francis Turbine." Journal of Mechanical Engineering 45, no. 04 (2009): 208. http://dx.doi.org/10.3901/jme.2009.04.208.

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28

Gomes Pereira, João, Loïc Andolfatto, and François Avellan. "Monitoring a Francis turbine operating conditions." Flow Measurement and Instrumentation 63 (October 2018): 37–46. http://dx.doi.org/10.1016/j.flowmeasinst.2018.07.007.

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29

., Ashwani Sharma. "EXPERIMENTAL EVALUATION OF A FRANCIS TURBINE." International Journal of Research in Engineering and Technology 05, no. 03 (2016): 522–27. http://dx.doi.org/10.15623/ijret.2016.0503094.

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30

Kawajiri, H., Y. Enomoto, and S. Kurosawa. "Design optimization method for Francis turbine." IOP Conference Series: Earth and Environmental Science 22, no. 1 (2014): 012026. http://dx.doi.org/10.1088/1755-1315/22/1/012026.

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31

Lama, R., S. Gautam, L. Lama, H. P. Neopane, and S. Chitrakar. "Development of a test rig for investigating the performance of a model Francis turbine." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012011. http://dx.doi.org/10.1088/1755-1315/1079/1/012011.

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Abstract Sediments flowing with water in the Himalayan Rivers of Nepal erodes the components of the turbine heavily. The design of hydraulic turbines prioritizes the hydraulic performance of the turbine, neglecting erosion challenges. The necessity of turbine design and its model testing has been felt in the past two decades in Nepal. An attempt is made to fill such conditions by developing a test rig for testing the 92 kW model Francis turbine at Turbine Testing Lab, Kathmandu University, Nepal. The model turbine is a scaled-down model of a 4.1 MW Francis turbine of a Jhimruk Hydropower Plant

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32

Acharya, Nirmal, Saroj Gautam, Sailesh Chitrakar, Igor Iliev, and Ole Gunnar Dahlhaug. "Correlating Sediment Erosion in Rotary–Stationary Gaps of Francis Turbines with Complex Flow Patterns." Energies 17, no. 23 (2024): 5961. http://dx.doi.org/10.3390/en17235961.

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Secondary flows in Francis turbines are induced by the presence of a gap between guide vanes and top–bottom covers and rotating–stationary geometries. The secondary flow developed in the clearance gap of guide vanes induces a leakage vortex that travels toward the turbine downstream, affecting the runner. Likewise, secondary flows from the gap between rotor–stator components enter the upper and lower labyrinth regions. When Francis turbines are operated with sediment-laden water, sediment-containing flows affect these gaps, increasing the size of the gap and increasing the leakage flow. This w

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33

Zhao, Dao Li, Wu Ke Liang, Hai Peng Nan, Wei Ma, Jin Bo Li, and Tao Tao Li. "Influences of Clearance in the Nether Wearing Ring on the Self-Excited Vibration of the Francis Turbine." Advanced Materials Research 383-390 (November 2011): 1150–54. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1150.

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Aimed at the self-excited vibration of caused by unreasonable clearance in wearing ring of the Francis turbine, whole flow passage of prototype hydraulic turbine which contains the clearance in wearing ring is numerically calculated by computational fluid dynamics software CFX based on N-S equation and RNG k-turbulence model. The result shows that the flow field in front of inlet of runner is unstable extremely, even if a tiny disturbance effects on, which will be out-of-balance symmetrically in the radial direction, then the force of runner will be unbalance, which will cause vibration of the

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Liu, Xingping, Xingxing Huang, Weijiang Chen, and Zhengwei Wang. "Flow-Induced Strength Analysis of Large Francis Turbine Under Extended Load Range." Applied Sciences 15, no. 5 (2025): 2422. https://doi.org/10.3390/app15052422.

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To meet the load requirements of the power grid, the hydroelectric power plants need to extend the operational load range of the turbine units, which are often operated under off-design operating conditions. This new challenge significantly changes the flow characteristics of the hydro turbine units. Strong vibrations and high stresses caused by pressure pulsations at various loads directly lead to severe damage to the runner blades, threatening the safe operation of the hydropower unit. In this study, the detailed flow dynamics analysis under three loading conditions of a large-scale Francis

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Vashishtha, Govind, and Rajesh Kumar. "Autocorrelation energy and aquila optimizer for MED filtering of sound signal to detect bearing defect in Francis turbine." Measurement Science and Technology 33, no. 1 (2021): 015006. http://dx.doi.org/10.1088/1361-6501/ac2cf2.

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Abstract This paper presents a method to detect the bearing defects in Francis turbine by minimal entropy deconvolution (MED) filter making use of a sound signal. As the outputs of MED are mainly influenced by the filter length hence its appropriate selection is very necessary to recover a single random pulse in case of a weak faulty signal. The optimal filter length selection is done by Aquila optimizer adaptively which uses the autocorrelation energy as its fitness function. Experimentation done on defective bearings of Francis turbine suggested that the proposed method exposes periodic impu

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36

Khare, Ruchi, and Vishnu Prasad. "Numerical Study on Performance Characteristics of Draft Tube of Mixed Flow Hydraulic Turbine." Hydro Nepal: Journal of Water, Energy and Environment 10 (December 5, 2012): 48–52. http://dx.doi.org/10.3126/hn.v10i0.7103.

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Draft tube is an important component of the hydraulic reaction turbine and affects the overall performance of turbine to a large extent. The flow inside the draft tube is complex because of the whirling flow coming out of runner and its diffusion along the draft tube. The kinetic energy coming out of runner is recovered in draft tube and part of recovery meets the losses. In the present work, the computational fluid dynamics (CFD) has been used for flow simulation in complete mixed flow Francis turbine for performance analysis for energy recovery, losses and flow pattern in an elbow draft tube

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37

Dahal, DR, and C. Trivedi. "Effect of runner blade numbers on inter blade vortices of Francis turbine under best efficiency loading." IOP Conference Series: Earth and Environmental Science 1483, no. 1 (2025): 012025. https://doi.org/10.1088/1755-1315/1483/1/012025.

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Abstract In this paper, the investigation of effect of change in blade number to the generation of inter-blade vortices was done in case of high head Francis turbine. Further, connection of these vortices with Rotor Stator Interaction (RSI) along with pressure fluctuation through runner blades was explored. Selection of optimal number of blades in design of Francis turbine is crucial since it directly impacts the performance of the turbine in all operating condition along with flexibility need in hybrid energy systems. This study focuses on the modified Francis-99 turbine design with the remov

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38

Mazij, Jernej, and Anton Bergant. "HYDRAULIC TRANSIENT CONTROL OF REFURBISHED FRANCIS TURBINE HYDROPOWER SCHEMES IN SLOVENIA." Journal of Energy Technology 8, no. 3 (2024): 25–39. https://doi.org/10.18690/jet.8.3.25-39.2015.

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This paper presents hydraulic transient control methods of refurbished Francis turbine hydropower schemes in Slovenia. Transient control strategies are presented, including the alteration of operational manoeuvres, transient control devices, suitable water conveyance system layout and operational limits. Computational models and modern hydraulic transient control approaches are also outlined. The paper concludes with the practical implementation of two case studies: the refurbish ment of Moste HPP and Doblar 1 HPP. Both hydropower plants are equipped with Francis turbine units and underwent re

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Diyorov, Rustam Kh, and M. V. Glazyrin. "Francis Turbine Modeling for Hydrounit on the Bases of the Doubly Fed Induction Machine." Applied Mechanics and Materials 792 (September 2015): 203–8. http://dx.doi.org/10.4028/www.scientific.net/amm.792.203.

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The mathematical model of Francis turbine, operating at variable speed hydrounit, has created. The results of numerical modeling are fully consistent with the physical representation of the behavior of the hydraulic turbine in dynamic modes.

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Sahu, Rohit Kumar, Bhupendra Kumar Gandhi, and Shubham Sharma. "Numerical flow field investigation around guide vane of a high head Francis turbine." Journal of Physics: Conference Series 2629, no. 1 (2023): 012001. http://dx.doi.org/10.1088/1742-6596/2629/1/012001.

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Abstract Guide vanes are the most eroded component of the Francis turbine, and flow instabilities around guide vanes influence the flow field at the runner inlet. Guide vane cascade can be considered an alternative method to investigate the flow field, which maintains flow similarity with the prototype turbine. The objective of this paper is to numerically analyze the flow field around the guide vane cascade. A single guide vane cascade numerical model is developed to perform the simulation using commercial software ANSYS 2022. Two turbulence models, shear stress transport k-ω and standard k-ε

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Kumar, Prashant, S. K. Singal, and Pankaj P. Gohil. "Numerical Analysis of Cavitation Characteristics of Francis Turbine at Different Runner Blade Numbers." IOP Conference Series: Earth and Environmental Science 1411, no. 1 (2024): 012062. https://doi.org/10.1088/1755-1315/1411/1/012062.

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Abstract The main objective of this study is to evaluate the hydraulic performance and cavitation characteristics of Francis turbine at different operating conditions by varying the number of runner blades 13, 15, and 17 using commercially available CFX code. The runner blade numbers have a significant impact on both the turbine’s hydraulic efficiency and cavitation characteristic performance. The turbine efficiency and cavitation characteristic of turbine has been analysed under the best efficiency point (BEP) condition in order to achieve the optimum number of runner blades for Francis turbi

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Gordon, J. L. "Hydraulic turbine efficiency." Canadian Journal of Civil Engineering 28, no. 2 (2001): 238–53. http://dx.doi.org/10.1139/l00-102.

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A set of empirical equations has been developed which defines the peak efficiency and shape of the efficiency curve for hydraulic turbines as a function of the commissioning date for the unit, rated head, rated flow, runner speed, and runner throat or impulse turbine jet diameter. The equations are based on an analysis of peak efficiency data from 56 Francis, 33 axial-flow, and eight impulse runners dating from 1908 to the present, with runner diameters ranging from just under 0.6 m to almost 9.5 m. The metric specific speeds (nq) ranged from 5.3 to 294. The root mean square error of the calcu

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Zhang, Si Qing, Guo Hua Ma, and Jing Qian. "Numerical Simulation of Cavitation Flow Field in a Francis Turbine Runner with Attached Blades." Applied Mechanics and Materials 700 (December 2014): 637–42. http://dx.doi.org/10.4028/www.scientific.net/amm.700.637.

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The numerical simulation of cavitation flow field in a Francis turbine runner with attached blades was conducted based on the no-slip mixture model in the Euler approach and the Singhal cavitation model. The RNG model after correcting viscosity and the pressure correction algorithm (SIMPLE) were supplemented. The distributions of the water-vapor volume fraction under non-design conditions were obtained. The results show that the method based on two-phase mixture model can be used to simulate the position and degree of cavitation flow in Francis turbine.

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Zhang, Dun, Yuan Zheng, Ying Zhao, and Jian Jun Huang. "The Characteristics Research of Tube Vortex Based on Large Eddy Simulation." Applied Mechanics and Materials 121-126 (October 2011): 3657–61. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3657.

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Numerical simulation of three-dimensional transient turbulent flow in the whole flow passage of a Francis turbine were based upon the large eddy simulation(LES) technique on Smargorinsky model and sliding mesh technology. The steady flow data simulated with the standard k-εmodel was used as the initial conditions for the unsteady simulation. The results show that LES can do well transient turbulent flow simulation in a Francis turbine with complex geometry. The computational method provides some reference for exploring the mechanism of eddy formation in a complex turbulent of hydraulic machine

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Li, Z. J., X. J. Yang, G. W. Cai, and X. S. Liu. "Frequency Reliability Analysis of Francis Turbine-Generator Units Based on Nonlinear Vibration." Materials Science Forum 628-629 (August 2009): 233–38. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.233.

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This paper studies the frequency reliability of the main shaft system of Francis turbine-generator units based on nonlinear vibration. Taking the generator and turbine as an integrated system, the nonlinear coupling dynamic equations of the system are established by the finite element method. According to the dynamic equations, the frequent factors of system are obtained by the method of multiple scales. The criterion is used that the difference between the natural frequencies and driving frequencies including the frequent factors should be less than specific values. The reliability mode and t

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Zhu, WenRuo, ZhongXin Gao, YongJun Tang, JianGuang Zhang, and Li Lu. "Adaptability of turbulence models to predict the performance and blade surface pressure prediction of a Francis turbine." Engineering Computations 33, no. 1 (2016): 238–51. http://dx.doi.org/10.1108/ec-06-2014-0137.

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Purpose – The purpose of this paper is to analyze the ability of turbulence models to model the flow field in the runner of a Francis turbine. Although the complex flow in the turbine can be simulated by CFD models, the prediction accuracy still needs to be improved. The choice of the turbulence model is one key tool that affects the prediction accuracy of numerical simulations. Design/methodology/approach – This study used the SST k-w and RNG k-e turbulence models, which can both accurately predict complex flow fields in numerical simulations, to simulate the flow in the entire flow passage o

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Twayna, Ranjeet, Ram Manandhar, Bikash Singh, Dadiram Dahal, Atmaram Kayastha, and Biraj Singh Thapa. "Numerical investigation of Cavitation in Francis Turbine." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1755-1315/1037/1/012017.

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Abstract Cavitation is one of the major challenges in the Himalayan rivers of Nepal that cause damage and degradation of the performance of hydraulic turbine components. Numerical analysis has been performed to investigate the cavitation effect in the Francis turbine. For detection of cavitation, the SST turbulence model using Rayleigh plesset equation has been used in ANSYS-CFX. The turbine is investigated for three different operating conditions i.e. part load, BEP and full load under cavitation and without cavitation. The results are shown based on efficiency, pressure fluctuation, vortex r

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Koirala, Ravi, Sailesh Chitrakar, Amod Panthee, Hari Prasad Neopane, and Bhola Thapa. "Implementation of Computer Aided Engineering for Francis Turbine Development in Nepal." International Journal of Manufacturing Engineering 2015 (August 13, 2015): 1–9. http://dx.doi.org/10.1155/2015/509808.

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The expansion of the existing industries involved in the production of components of hydropower to the Francis turbine manufacturer up to 5 MW unit size has been recognized as one of the most promising business models in Nepal. Given the current fact that the development of Francis turbines with the manufacturers of Nepal has not been done yet, due to lack of designing expertise and limitations in the available technology, this paper presents the use of different available manufacturing technologies, which is suitable in the Nepalese hydropower market. This is an experience based paper, in whi

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He, Fang. "Based on CFX Numerical Simulation of Francis Turbine Runner." Applied Mechanics and Materials 456 (October 2013): 207–10. http://dx.doi.org/10.4028/www.scientific.net/amm.456.207.

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This paper presents a vibration prediction method for Francis turbine: Provided with advanced CFX software, Numerical simulation of movable guide vane and Turbine runner’s internal flow state. From the source of hydraulic vibration, Focus on numerical analysis, numerical simulation for the cutting thickness of the runner blade. After analysis of the influence of the blade of hydraulic vibration. To explore new ways for the hydro turbine control hydraulic vibration.

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Akash, Gupta. "CFD Analysis in Francis Turbine Performance- A Review." Journal of Advanced Mechanical Sciences 1, no. 1 (2022): 31–35. https://doi.org/10.5281/zenodo.7046044.

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In any hydro power plant its turbine enacts a major role in deciding the competence as lot of phenomena depends on it if turbine works smoother then performance achieved by plant will be more and for that analysis of turbine becomes a need of the time and this need is fulfilled by the CFD it offers various software packages to analyse the part numerically at virtually no cost and in this study various parameters affecting different component of Francis turbine are analysed using CFD in addition to some validation of CFD results with actual one are also mentioned.

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