基于有限元仿真技术的潮流能发电装置导流箱入射角度优化研究
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摘要
以开发的新型潮流能发电装置为对象,利用有限元仿真技术进行导流箱入射角度的优化设计。通过对潮流流动特性分析构建了能够反映潮流非稳态三维流动特征的RNG模型,进一步建立了潮流冲击导流箱过程的有限元模型,并对潮流冲击导流箱的动态物理过程进行了有限元仿真分析,获得了不同入射角度下的导流箱受力迭代曲线、压力云图、水流速度矢量图和水流轨迹图。研究表明:导流箱入射角度最优范围为15°~25°,该范围内,水流冲击性能较好,高速水流数目较多;导流箱外侧对水流的聚集作用明显高于内侧,在潮流能发电装置设计中应注重对导流箱外侧结构的设计。
With the new current energy power system for object,the incident angle of current guiding box is optmized by usingthe finite element simulation technology. The RNG model is built by analyzing the current flow characteristics which can reflectthe unsteady three-dimensional flow characteristics of current. Furthermore,the finite element model of physical process thatthe current impacts guiding box is constructed,and the physical process of impact on current guiding box is simulated and ana-lyzed. The iterative curve of force,cloud picture of pressure,diagram of water flow velocity vector and diagram of water flowtrajectory of current guiding box at different incident angle are obtained. The studies have shown that the optimal range of inci-dent angle of current guiding box is 15° to 25°,in which the performance of current impact is better and the high-speed cur-rent number is more. The accumulation effect of water flow outside current guiding box is stronger than inside,which meansthe outside structure design of current guiding box should be attached great importance for design of current energy power sys-tem.
With the new current energy power system for object,the incident angle of current guiding box is optmized by usingthe finite element simulation technology. The RNG model is built by analyzing the current flow characteristics which can reflectthe unsteady three-dimensional flow characteristics of current. Furthermore,the finite element model of physical process thatthe current impacts guiding box is constructed,and the physical process of impact on current guiding box is simulated and ana-lyzed. The iterative curve of force,cloud picture of pressure,diagram of water flow velocity vector and diagram of water flowtrajectory of current guiding box at different incident angle are obtained. The studies have shown that the optimal range of inci-dent angle of current guiding box is 15° to 25°,in which the performance of current impact is better and the high-speed cur-rent number is more. The accumulation effect of water flow outside current guiding box is stronger than inside,which meansthe outside structure design of current guiding box should be attached great importance for design of current energy power sys-tem.
引文
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[2]Khan M J,Bhuyan G,Iqbal M T.Hydrokinetic erengy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications[J].A technology status review.Applied Energy,2009,86(10):1823-1835.
[3]段自豪,陈正寿.潮流发电现状分析及未来展望[J].中国水运,2012,12(2):106-107.
[4]徐全坤.水平轴海流能发电机组载荷分析与控制技术研究[D].杭州:浙江大学,2015.
[5]Rourke O,Boyle F,Reynolds A.Tidal energy update[J].Applied Energy,2010,87(2):398-409.
[6]戴军,单忠德,王西峰,等.潮流发电技术的发展现状及趋势[J].能源技术,2010,3(1):37-41.
[7]盛传明.复杂工况下潮流能水平轴水轮机水动力性能研究及叶片优化[D].青岛:中国海洋大学,2014.
[8]Shujie Wang,Peng Yuan,Dong Li,Yuhe Jiao.An overview of ocean renewable energy in China[J].Renewable and Sustainable Energy Reviews,2011,15(1):91-111.
[9]林勇刚,李伟,刘宏伟,等.水下风车海流能发电技术[J].浙江大学学报:工学版,2008,42(7):1242-1246.
[10]马舜,李伟,刘宏伟,等.25 k W独立运行式水平袖測流能发电系统[J].电力系统自动化,2010,34(14):18-22.