A Numerical Prediction of Tip Vortices from Tandem Propellers in the Counter-Rotating Type Tidal Stream Power Unit

• 作者: Hoyun Jung Pin Liu Toshiaki Kanemoto
• 来源期刊: 电力能源(英文)
• 学科: 医学
• 关键词: TIDAL Stream Power Unit Counter-Rotation CFD (Computational Fluid Dynamics) TIP VORTICES MRF (Multiple Reference Frame) TANDEM PROPELLERS
• 年，卷（期）: 2017,（12）
• 页码范围: 66-74
• 页数: 9页
• 分类号: R73

摘要

Ocean energy has a potential of providing a large amount of renewable energy around the world. One of the forms of ocean energy, tidal stream power is widely recognized as the continuous, predictable and eco-friendly ocean energy source. Unique tandem propellers that can counter-rotate have been designed to generate electric power effectively from a tidal stream. This type of power unit has several advantages compare to the conventional unit with a single propeller. At the design of the tidal stream power unit, it is important to investigate the structure of the tip vortex tubes shedding to predict the load of the propeller. In this research, we investigated the tip vortex shedding using the CFD method for the conventional single propeller and counter-rotating type tandem propellers and estimated the performance efficiency using RANS (Reynolds Averaged Navier-Stokes) model and we confirmed the limitation of RANS model on the calculation of the tip vortex stretching.