STUDI KEGAGALAN SUDU RUNNER TURBIN AIR TYPE FRANCIS (Kasus Penipisan Sudu Runner)

Sari

Hydro turbine runner blades operated for Hydro Power, a failure. This is very
disturbing installation productivity. For that we need more research done on the source of
failure in order to do preventive measures and improvements so that the time will come the
same damage does not happen again.
This study aims to analyze and find the main causes of failure in the hydro turbine
runner blades . In supported this research is testing the following: Visual Inspection and
Testing working fluid water. From the results this study note that the material caracteristics
hydro turbine blade runner is G-X5 Cr Ni 134 similar to ASTM A743 with a composition CA6
NM content elements as follows: 0.07% C, max 1.5% Mn, 1.0 max % Si, Cr 12,0-13,5%, 3,5-
5,0% Ni, 0.70% Mo.
The main causes study the hydro turbine runner blades, this water is the thinning the
blade wall, the mechanism acidic water as a energy source to encourage high-speed blades to
rotate the blade, resulting in the collision surface blade, so blade will experience thinning the
walls so the blade runner blade into broken. Runner blade fracture accelerated because of the
water as the driving force and acidic sand.