二重反転プロペラ風車の性能向上に関する研究開発

抄録

In recent years, growing concern over global warming caused by the use of fossil fuels has led to a demand for clean power generation that can be used semi-permanently and is environmentally friendly. Wind power generation is expected as the development of new energy sources accelerates. Propeller wind turbines are widespread for large wind turbines. On the other hand, a wide variety of small wind turbines exist. Among them, the authors consider that 1kW wind power generation is important for the spread of small wind turbines, and are focusing on contra-rotating propeller wind turbines, which are expected to achieve high output. In this research, we aim to increase the output of a small wind turbine by installing a wind collecting device suitable for a contra-rotating propeller. However, since the aerodynamic characteristics of the contra-rotating propeller installed inside the hollow body have not been clarified. Therefore, we investigate the performance characteristics of the contra-rotating propeller wind turbine by numerical flow analysis using a model with the contra-rotating propeller installed inside the pipe. In this paper, we focus on the attack angle and solidity that greatly affect the performance of wind turbines, and show the results of investigating their performance characteristics and internal flow by numerical analysis.