• Dr. Harminder Singh Saggu

The mystery of erosion phenomenon is not yet fully understood in terms of extent of its dependence on various parameters and the relative importance of these parameters in different situations. The hydro power projects, especially those located nearby Himalayan region, suffer a serious setback due to silt erosion. Erosion of key underwater components leads to increase the down time of the project for preventive maintenance. Thus, there is an urgent need to solve this problem or at least minimize its deleterious effects. Many remedial measures have been suggested to control the problem. However, dependence of erosion on numerous parameters adds to the complexity of the problem. Therefore, along with all the efforts to minimize the occurrence of erosion, the erosion resistance of the material must primarily be improved. Presently, 13/4 martensitic stainless steel or CA6NM, is being widely used for the critical underwater components of hydro turbine. However, 13/4 steel is reported to be less resistant to silt erosion and having poor weldability. This led to the development of alternative materials. Recently, the new grades of nitronic steel are reported to be more erosion resistant than 13/4 steel.

Erosion, turbine, hydro power

"Contending erosion in hydro turbine for moderate temperature applications ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.670-673, March-2019, Available :http://www.jetir.org/papers/JETIREL06104.pdf

"Contending erosion in hydro turbine for moderate temperature applications ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp670-673, March-2019, Available at : http://www.jetir.org/papers/JETIREL06104.pdf