Abstract:

Steam turbine improvements will improve the system's heat rate, thereby improving efficiency of operations, as well as decreasing maintenance costs. In addition, greater steam turbine efficiency also reduces or eliminates greenhouse gas emissions. Figure 3.1 FlowChart Process in thebelow chart the approach to obtain the final expected output as accurate as possible. A three-dimensional model of blade was developed using a computer-aided design software. All materials were assumed linear, homogenous, elastic and isotropic. A 5 N widespread force was applied to the blade. The results of this study showed that longer blades are experienced higher maximum Von Mises stress and strain than shorter ones. The blade with the length of 400 mm and thickness of 20 mm experienced the lowest maximum Von Mises stress at 51 kPa. Furthermore, blade with the length of 400 mm and 600 mm experienced the lowest and highest strain at 3.07 × 10–6 and 4.3 × 10–6 respectively. In addition, thicker blades were undergone less maximum Von Mises stress and strain than thinner ones. Understanding stress and strain pattern in turbine blades provides useful knowledge which can be useful to estimate the fatigue in turbine blades.

Description:

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