Journal of Research in Mechanical Engineering and Applied Mechanics ISSN: 3107-4510 (Online)

Authors:- B. Suvarnaraju, Subramanyam Pavuluri, A. Balkrishna

Abstract:- Efficiency considerations in steam turbine moving blades involve predicting the dynamic behavior using mechanical structure vibration theory. The evaluation of blade designs relies on understanding dynamic behavior and fluctuating forces. The primary design focus is on minimizing dynamic stresses induced by fluctuating forces. As these forces exhibit periodicity, achieving resonance with blade natural frequencies becomes crucial, often assessed through a Campbell diagram. The study encompasses estimating dynamic behavior, analyzing centrifugal force stresses in the final stage, and evaluating disc groove stresses at root contact. The research involves comprehensive analyses, including mode shapes and natural frequencies determination, and validation through Campbell diagrams against experimental data. Due to the blade's unique length and twist, accurate geometry determination requires extensive input. The blade's geometry is established by various profile data at different heights. The findings and conclusions from this research contribute valuable insights into steam turbine blade durability.

Keywords:-Steam Turbine, Turbine Blades, Strength, Efficiency, Life.