导流罩水动力特性及其对海流能机组的作用  

Hydrodynamic characteristics of diffuser and its effect on tidal current turbine

作　　者：高艳婧 顾亚京 林勇刚[1] 刘宏伟[1] 王思敏 GAO Yanjing;GU Yajing;LIN Yonggang;LIU Hongwei;WANG Simin(State Key Laboratory of Fluid Power&Mechatronic Systems,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《中南大学学报（自然科学版）》2021年第9期3164-3173,共10页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划项目(2018YFB1501900);国家自然科学基金资助项目(51905472,51775487,51575477);国家海洋可再生能源专项资金资助项目(GHME2017SF02)。

摘　　要：为了提高海流能发电装置的能量捕获效率和有效的发电时间,采用FLUENT对9种结构型式导流罩进行数值模拟,并研究分析不同结构参数对翼型导流罩水动力性能的影响,在此基础上提出翼型导流罩的设计方法,最后基于该方法设计500 W海流能机组翼型导流罩。研究结果表明:相比于其他8种结构型式导流罩,翼型导流罩具有最佳的水动力性能;基于翼型导流罩设计方法设计的500 W海流能机组翼型导流罩不仅可以降低机组启动流速,而且可以在入口流速为额定流速的情况下提高62.1%的捕获功率。In order to improve the efficiency of the current energy generator and effective generation time,the numerical simulation was carried out to investigate hydrodynamic performance of diffusers with different structures and analyze hydrodynamic performance of airfoil diffusers with variable parameters.On the basis,a design method of airfoil diffusers was presented,and an airfoil diffuser was designed for 500 W horizontal-axis tidal current turbine.The results show that compared with the other eight kinds of diffusers,the airfoil diffuser has the best hydrodynamic performance.Based on the design method of airfoil diffusers,the airfoil diffusers designed for 500 W horizontal-axis tidal current turbine can start at lower velocity and when the inlet flow velocity is the rated flow velocity,the turbine power can be increased by 62.1%.

关 键 词：海流能机组 翼型导流罩 低流速 数值模拟 

分 类 号：P743[天文地球—海洋科学] TM612[电气工程—电力系统及自动化]