1. indroduction
- Sediment such as sand flowing along with water impacts against surfaces of hydrulic turbine components
- This can cause sediment erosion in components and severe damage to turbine components
- Consequently, the erosion leads to decrease in efficiency and reduces the life of turbine components
2. Objectives
- Obtain performance characteristics of Francis turbine with sediment
- Compare performance of Francis turbine with non-sediment water and sediment laden water
- Predict sediment erosion on runner surface
3. Conclusion
- Computer simulations were conducted to fine out the performance characteristics of Francis turbine with sediment
- Properties of quatz was used to model the sediment and Tabakoff and Grant model was adopted for erosion prediction
- As a result, the simulation with sediment had more similar performance compared to experimental data
- It was thought that sediment erosion mainly would occur at the pressure side than suction side of runner
- Also the outlet side of runner was prone to be damaged by sediment erosion