Fault Analysis of Pelton Turbines in Sediment-Affected Power Plants

Objectives
To quantitatively analyze the impact of sediment-induced erosion on Pelton turbine nozzles by examining changes in flow behavior and pressure signals through numerical simulations and experimental data.
To study various erosion patterns in Pelton turbine nozzles, catalog their characteristics, and apply this knowledge to design nozzle prototypes for experimental testing and simulations.

Expected Outcomes:
This research project is poised to significantly contribute to the understanding of sediment-
induced erosion in Pelton turbines, offering valuable insights into the consequences of such
erosion patterns. The project’s simplified approach, combining numerical simulations, 3D
designs, and experimental analysis, anticipates several key outcomes.

Insights into Erosion Patterns:
The research provides a detailed understanding of erosion patterns typically observed in Pelton turbine nozzles under sediment-laden conditions. By replicating these patterns through 3D design and printing, the research is expected to yield accurate representations that will serve as a basis for further analysis.

Numerical Simulation Predictions:
Through extensive numerical simulations, the research endeavors to predict the flow behavior and pressure signals of eroded nozzles. This aspect is crucial for comprehensively assessing how erosion affects the performance of Pelton turbine nozzles, and by extension, the overall efficiency of the turbine.

Experimental Validation:
The experimental setup, utilizing replicated eroded nozzles in a controlled, clean water environment, is anticipated to provide tangible data on pressure signals for both normal and eroded nozzles. This experimental validation will offer real-world insights into the performance implications of sediment-induced erosion.

Flow Visualization and Image Processing:
The use of high-speed cameras for flow visualization and subsequent image processing is expected to yield visual evidence of the differences in flow patterns between normal and eroded nozzles. This aspect adds a qualitative dimension to the study, enhancing the overall understanding of the impact of erosion on the flow dynamics.

Contribution to Sustainable Energy Practices:
Ultimately, the knowledge gained from this research is expected to contribute to the optimization of turbine designs, improving the efficiency and reliability of hydropower plants. By addressing the specific challenges posed by sediment-induced erosion, the outcomes of this project align with the broader goal of ensuring a sustainable and resilient future for hydropower as a cornerstone of renewable energy generation.

In summary, the expected outcomes encompass a comprehensive understanding of erosion patterns, numerical predictions, experimental validation, and practical guidelines for turbine maintenance and design, all of which collectively contribute to advancing the field of hydropower towards greater efficiency and sustainability.

Supervisors from host and Partner Universities
Home University: Kathmandu University
Supervisors from Home University: Prof. Hari Prasad Neopane, Asst.Prof. Sailesh Chitrakar
Partner University: Norwegian University of Science and Technology (NTNU)
Supervisor from Partner University: Prof. Ole Gunnar Dahlhaug, NTNU

About myself
Hello, I’m Sajan Satyal, a Mechanical Engineer from the majestic landscapes of Kavrepalanchok, Nepal. Currently, I find myself involved in the field of hydropower, pursuing my master’s degree under the esteemed Hydro Himalaya Project. Mechanical engineering, specifically the significance of hydropower design and maintenance, fuels my professional journey and academic curiosity.

Beyond the academic domain, my life thrives on exploration. Whether it’s travelling new places or trekking through nature’s wonders, I embrace the thrill of adventure. Sports, too, hold a special place in my heart—I’m open to trying my hand at anything, be it football, table tennis or any other sports. One of my unique pastimes involves friendly table tennis matches with my Norwegian friends at the lab, adding a touch of cultural exchange to my routine.

In addition to my academic and adventurous pursuits, I bring in the personal attributes of honesty, directness, and a natural ability to connect with individuals from diverse backgrounds. While I’m currently focused on my master’s, the prospect of contributing my skills and creativity to the industrial sector post-graduation is an exciting thing I plan to explore.

Sajan Satyal
Masters Candidate under Hydro-Himalaya
Email: satyalsajan7@gmail.com
Batch: 2023, 2 nd Batch

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