STRESS ANALYSIS ON TURBINE BLADE FRANCIS USING FINITE ELEMENT METHOD

The turbine is an important part of a power plant, so it needs maintenance for
energy supply. The "rotor-blade assembly" is one of the turbine parts. The moving fluid
makes the blades rotate and generates energy to drive the rotors. The water turbine is used
as a tool to convert the potential energy of water into electrical energy. This mechanical
energy is then converted into electrical energy by a generator. In this paper, a model of
the Francis turbine blade is made using the computer-aided design of Solidworks 2018 by
choosing the material to be used in the form of ASTM A743 CA 6NM which is
martensitic stainless steel commonly used in the energy industry - runner components -
because of its superior toughness, yield, has good corrosion ability, and fatigue
properties. Then the blade that has been designed will be analyzed using Ansys. The
analysis performed on the blade is in the form of an equivalent (von Mises) stress analysis
by varying the blade with several blade variations of 10, 12, 15, 17, and 19. The results of
the analysis on the greatest stress were obtained in the variation of the number of blades
10, which was 43,008 Mpa, and analysis the smallest stress on the variation of the
number of blades 19 is 32,696 MPa. So that the more number of blades will affect the
value of the resulting voltage.
Keywords: Blade Turbine Francis, ASTM A743 CA 6NM, Stress.