排灌机械工程学报2017，Vol.35Issue(5)：393-397,5.DOI:10.3969/j.issn.1674-8530.16.0238
变桨距角下水平轴海流能水轮机水动力特性及结构性能
Hydrodynamic and structural characteristics of horizontal axis current turbine under different pitch angles
摘要
Abstract
Based on the results of a two-dimensional hydrofoil obtained by computational fluid dyna-mics (CFD),the best angle of attack for the hydrofoil determined firstly by means of the lift to drag ratio chart at various angles of attack.The three-dimensional blades of a horizontal axis current turbine with 20 kW rated power were designed by using the Wilson method in Matlab.The hydrodynamic cha-racteristics of the current turbine,such as the power,moment and axial thrust coefficients were predicted using CFD under different pitch angles and tip speed ratios.The static structural characteristics were also calculated using finite element method under various hydro-loads,the stress and strain in the blades were analyzed.The results show that increasing pitch angle in the range of 1°-5° could be helpful to reduce the starting moment at a low tip speed ratio,moreover,increasing pitch angle can reduce the axial load,deformation and stress when the axial flow velocity is too high.The power coefficient of the turbine can reach to 0.301 and its structure can meet the requirements of material strength under the optimal operating condition.These achievements can be favourable to the design and optimization of marine current turbines.关键词
水平轴海流能水轮机/水动力特性/应力应变/攻角/桨距角/叶尖速比/数值模拟Key words
horizontal ocean current turbines/hydrodynamic characteristics/strain and stress/attack angle/pitch angle/tip speed ratio/numerical simulation分类
农业科技引用本文复制引用
刘恒,王文全,闫妍..变桨距角下水平轴海流能水轮机水动力特性及结构性能[J].排灌机械工程学报,2017,35(5):393-397,5.基金项目
国家自然科学基金资助项目(51479085,11262008) （51479085,11262008）
霍英东教育基金会青年教师基金资助项目(141120) （141120）
