Objectives
- Develop the reference scenario of a selected power plant in Nepal whose turbines are affected by sediment erosion.
- Study of different types of labyrinth seals of Francis turbines for minimizing leakage flow.
- Investigate sediment erosion in labyrinths of reference Francis turbine using numerical techniques.
- Optimize labyrinths of Francis turbine for minimizing sediment erosion and validate using experimental techniques.
Mamata Rijal
PhD Candidate
mr02065321@student.ku.ed
Expected Outcomes:
The project has focused on the labyrinth seals of the Francis turbine. Labyrinth seals are primary non-contact seals present between turbine cover and runner parts of the Francis turbine. They are used for controlling axial forces from the runner and minimizing unwanted leaks between the rotor and stator parts of the turbine. Thus, labyrinth seals help to decrease the turbomachinery losses and hence increase the efficiency of the turbine. The research work has anticipated to show the influence of labyrinth seal geometry on the erosion wear and leakage flow. The main aim of the study is to get optimized design of labyrinth seals of Francis turbine for minimizing leakage flow and sediment erosion. A number of publications are also expected from the research study like “Numerical Study of Straight-through, Stepped and Full-length labyrinth seals of Francis turbine”, “Numerical study of erosion on labyrinth seals of Francis turbine”, and “Experimental study on measurement of pressure drop in labyrinth seals of Francis turbine”.
Supervisors from host and Partner Universities
Host University: Prof. Hari Prasad Neopane, KU
Dr. Sailesh Chitrakar, KU
Partner University: Prof. Ole Gunnar Dahlhaug, NTNU