摘要
后弯管波浪能发电技术是振荡水柱发电技术中的一种,因其具有良好的波浪能捕获性能而被广泛研究。为了研究吃水深度、气室形状、后弯管迎浪面形状和水平管长度对后弯管俘获宽度比的影响,首先基于仿真软件Fluent建立波浪水槽数值模型,然后进行比例模型试验,最后对比数值模型和比例模型结果以验证仿真结论。研究结果表明:在形成封闭气室的条件下,吃水深度越小,俘获宽度比越大;当气室形状改变造成工作液面截面积变化时,会对俘获宽度比产生影响;气室形状对喷嘴处流速影响明显,当气室倾角θ为60°时,俘获宽度比和喷嘴处流速最大;改变后弯管迎浪面形状可以改善波浪能捕获效果;长度适合的水平管可以提高俘获宽度比,当水平管长度超过波长的1/4后俘获宽度比降低。可见,4种参数对后弯管的发电性能有较大的影响。研究结果对浮式防波堤的海上发电工程具有一定的参考价值。
Backward bent duct buoy(BBDB)wave power generation technology,as one of the oscillating water column power generation technologies,has been widely studied for its good wave capture performance.In order to study the effects of draft depth,air chamber shape,wave-hit shape of BBDB and horizontal pipe length on the capture width ratio(CWR)of BBDB,the numerical model of wave flume was established on the basis of the simulation software Fluent to carry out the scale model experiment,prior to comparing numerical model results with scale model results to verify the simulation conclusion.The results show that under the condition of forming a closed air chamber,the smaller the draft depth is,the larger the CWR is.When the shape of the air chamber changes,the cross-sectional area of the working fluid level changes consequently,which can affect the CWR.The shape of the air chamber affects the flow velocity at the nozzle remarkably.Especially,when the chamber inclinationθis 60°,the CWR and the flow velocity at the nozzle reach the maximum.What s more,the wave energy capture effect can be improved by changing the wave-hit shape of the BBDB.Finally,a horizontal pipe of suitable length can improve the CWR,but when the length of the horizontal pipe exceeds 1/4 of the wavelength,the CWR decreases.It can be seen that the four parameters have a great influence on the power generation performance of BBDB.The results of the study can be of reference value for the offshore power generation engineering application of the floating breakwater.
作者
陈凯翔
宋瑞银
吴瑞明
蔡泽林
吴烨卿
CHEN Kaixiang;SONG Ruiyin;WU Ruiming;CAI Zelin;WU Yeqing(School of Mechanical and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,Zhejiang,China;Ningbo Tech University,Ningbo 315100,Zhejiang,China;Faculty of Mechanical Engineering&Mechanics,Ningbo University,Ningbo 315211,Zhejiang,China)
出处
《浙江科技学院学报》
CAS
2021年第3期181-190,共10页
Journal of Zhejiang University of Science and Technology
基金
国家重点研发计划项目(2016YFC0300500)
宁波市重大科技攻关项目(2017C110005)
宁波市科技计划项目(2015C50061)。
关键词
波浪能
后弯管
三维数值模拟
俘获宽度比
wave energy
backward bent duct buoy(BBDB)
three-dimensional numerical simulation
capture width ratio(CWR)
