水平轴潮流能捕获桨叶设计流速研究  

Research on the design flow velocity of blade of horizontal axis tidal current turbine

作　　者：林躜[1,2] 张利[3] 李江花[3] 姜楚华[2] 陈俊华[2] 杨灿军[1] 

机构地区：[1]浙江大学机械工程学院,浙江杭州310027 [2]浙江大学宁波理工学院,浙江宁波315100 [3]太原科技大学机械工程学院,山西太原030024

出　　处：《海洋工程》2016年第2期71-79,共9页The Ocean Engineering

基　　金：国家海洋局可再生能源专项资金资助项目(NBME2011CL02);宁波市民生科技资助项目(2013C11037)

摘　　要：针对定桨距桨叶在时变潮流流速中设计流速选取的关键问题,应用叶素动量与流体动力学理论,建立变流速中设计流速与桨叶捕获功率之间的数学模型。结合韭山列岛的实测数据,以潮流流速变化的一个半月周期内捕获总能量最大为目标,利用MATLAB计算迭代得到合适的设计流速。与最大潮流流速作为设计流速的设计方法作对比,对不同流速下桨叶的旋转角速度及捕获功率情况作理论预测对比。搭建实验平台进行实际测试,结果显示:基于合适设计流速下的桨叶设计在潮流流速变化的大部分时间段内功率捕获优于以往设计桨叶,在潮流流速变化的一个半月周期内捕获总能提高了约8%,验证了该设计方法的正确性与合理性,本结论对变流速中定桨距桨叶的设计具有一定参考价值。Aiming at solving the key problem of fixed-pitch blade of tidal current turbine, a mathematical model for design velocity in variable flow velocities and blade capturing power is established using blade momentum and fluid dynamics theory, Based on the testing data around Jiushan archipelago and by maximizing the total capturing energy within a month and a half cycle of tidal current velocity variation as the goal, MATLAB is used to calculate iteration to get the right design velocity. Compared with the method of maximizing velocity as a design velocity, it makes a theoretical prediction on the angular velocity and the power captured of the turbine under different flow velocities. An experimental platform is set up for actual testing and the results show that the capturing power of the blade which is designed under appropriate design flow velocities is superior to that of the previous design blade during most time of marine current velocity variation, with the total capturing energy in a month and a half cycle of variable flow velocities increased by about 8%, validating the correctness and rationality of the design method, which has a certain reference value for the design of fixed-pitch marine current turbine blades in variable flow velocities.

关 键 词：水平轴 定桨距桨叶 设计流速 周期捕获总能量 桨叶性能对比 

分 类 号：P742[天文地球—海洋科学]