期刊
OCEAN ENGINEERING
卷 291, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2023.116373
关键词
Renewable energy; Hydrokinetic turbine; Fluid structure interaction; Savonius turbine; Surface roughness
This paper presents a one-way three-dimensional fluid-structure interaction simulation to analyze the performance of a static Savonius hydrokinetic turbine. The results indicate that the optimal rotor position for the highest coefficient of static torque is at 15 degrees. Increasing water velocity improves the turbine's static torque, while surface roughness has a negative effect on the static torque coefficient. Different materials exhibit different stress and deformation, highlighting the importance of materials selection in the early design process.
Hydrokinetic turbines are prone to a harsh hydrodynamic environment with intricate vortical flows that elevate the probability of failure. The degradation of the blade surface caused by corrosion can impact the blade's hy-drodynamic and the structural performance. This paper reports a one-way three-dimensional fluid-structure interaction simulation to analyse the performance of a static Savonius hydrokinetic turbine at varying rotor positions, with different surface roughness and water velocities, in terms of coefficients of static torque, static torque, stresses, and blade deformation. The simulations revealed that the optimum position for the highest coefficient of static torque was at 15 degrees (Cst = 0.30) in reference to the water flow. Increasing the water velocity from 0.4 ms-1 to 0.84 ms-1 improved the turbine static torque due to an increase in the kinetic energy. However, the presence of surface roughness has deterioration effects on the static torque coefficient due to a delayed separation which causes a drag reduction. The simulation predicted no structural failure at 0.4 ms-1 and 0.84 ms-1, but varying materials exhibited varying maximum principal stress and deformation, highlighting the significance of the early development of materials selection process. The maximum von Mises stress and deformation was obtained when the turbine is resting at 45 degrees for aluminium blade (sigma = 1.05 MPa, epsilon = 5.6e-4 mm). The results of this study indicate suitable materials from a hydrodynamic and material perspectives for the construction of the Savonius hydrokinetic turbine, which can be implemented in the design process to potentially save cost and minimize turbine downtime.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据