Investigation of Transonic Vortex Shedding on Turbine Blades

In recent decades, engine performance has become a primary focus for engineers in the aviation industry, driven by the critical need to optimize fuel consumption and reduce pollutant emissions. This emphasis on performance has led to in-depth investigations into phenomena that can increase losses and decrease engine efficiency. One such phenomenon is Transonic Vortex Shedding in turbine blades. This study begins with a comprehensive review of existing literature on transonic vortex shedding, a topic extensively analyzed due to its significant impact on performance losses. The literature review highlights various theoretical and experimental approaches previously undertaken to understand this complex phenomenon. It also identifies gaps in current knowledge and areas where further research is needed. Following the literature review, a series of Computational Fluid Dynamics (CFD) simulations were conducted to explore the key characteristics of transonic vortex shedding. These simulations aimed to understand the underlying physical principles, the influence of design and boundary conditions, and the sensitivity of different software tools. The simulations were meticulously designed to replicate real-world conditions as closely as possible, ensuring the reliability and applicability of the results. All simulations and analyses were performed with the collaboration of Turbine Aero team at Avio Aero. Advanced CFD techniques and state-of-the-art software were used to capture the intricate details of the vortex shedding process. The results provided a deeper understanding of how transonic vortex shedding occurs and its impact on turbine blade performance. Based on the findings, several potential solutions to mitigate or eliminate the effects of transonic vortex shedding were proposed and tested. These solutions included modifications to blade geometry, adjustments to operating conditions, and the implementation of innovative design features. Each proposed solution was evaluated for its effectiveness in reducing losses and improving overall engine efficiency. In conclusion, this work provides valuable insights into transonic vortex shedding and offers practical solutions to minimize its impact on turbine blade performance. By addressing this critical issue, the study contributes to the ongoing efforts to enhance engine efficiency, reduce fuel consumption, and lower pollutant emissions in the aviation industry. The findings have significant implications for future turbine blade design and optimization, paving the way for more efficient and environmentally friendly aircraft engines.