海流能轮机叶片翼型的水动力学特性模拟

发布时间：2018-03-18 13:14

本文选题：海流能发电装置　切入点：水翼　出处：《船舶工程》2017年07期 　论文类型：期刊论文

【摘要】：基于卧式海流能发电装置,采用雷诺平均N-S方程,对来流攻角从0°~26°情形下的叶片翼型进行数值模拟,分析比较不同攻角下水动力学特性的变化规律。结果表明:一定范围内增加攻角可有效提高升阻比,但升力系数最大时,升阻比、水翼捕能效率不一定最高,失速角也不一定是最佳攻角,验证了水翼失速的根本原因是边界层的分离;水翼吸力面与压力面的压差较大,此压差为水翼提供较高的升力系数,主要来自于水翼的前半部。此外,还分析了水翼周围流场的速度分布、压力分布等水动力特性与攻角的关系,为设计高效的海流能转换叶片提供了理论参考。
[Abstract]:Based on horizontal current power generation device, the blade airfoil with an attack angle from 0 掳to 26 掳is numerically simulated by using Reynolds average N-S equation. By analyzing and comparing the dynamic characteristics of water at different angles of attack, the results show that the ratio of lift to drag can be improved effectively by increasing the angle of attack in a certain range, but when the lift coefficient is maximum, the ratio of lift to drag is not always the highest, and the efficiency of energy capture of hydrofoil is not necessarily the highest. The stall angle is not necessarily the best angle of attack, which verifies that the fundamental cause of hydrofoil stall is the separation of boundary layer, and the pressure difference between suction surface and pressure surface of hydrofoil is larger, which provides a higher lift coefficient for hydrofoil. It mainly comes from the front half of the hydrofoil. In addition, the relationship between the hydrodynamic characteristics such as velocity distribution, pressure distribution and angle of attack is analyzed, which provides a theoretical reference for the design of efficient ocean current energy transfer blades.
【作者单位】：上海海洋大学工程学院;上海河口海岸科学研究中心;
【基金】：上海交通大学海洋工程国家重点实验室开放课题(1206) 上海市自然基金项目(14ZR1420200) 海洋可再生能源专项资金项目(SHME2013JS01) 上海市2014年优秀技术带头人计划项目(14XD1424300)
【分类号】：P743.1;TM612

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