安装高度对水平轴潮流能水轮机尾流特性的影响
PDF下载 (300)王 烨,朱善强,李振琦,李广年.安装高度对水平轴潮流能水轮机尾流特性的影响[J].宁波大学学报(理工版),2023,36(4):7-13.DOI:10.20098/j.cnki.1001-5132.2022.0717
WANG Ye,ZHU Shanqiang,LI Zhenqi,LI Guangnian.Influence of installation height on wake characteristics of horizontal axis tidal energy turbine[J].Journal of Ningbo University(Natural Science & Engineering Edition),2023,36(4):7-13.DOI:10.20098/j.cnki.1001-5132.2022.0717
| Title: | Influence of installation height on wake characteristics of horizontal axis tidal energy turbine |
| 作者: | 王 烨, 朱善强, 李振琦, 李广年 |
| Author(s): | WANG Ye, ZHU Shanqiang, LI Zhenqi, LI Guangnian |
| 关键词: | 潮流能水轮机; 安装高度; 数值模拟; 尾流特性 |
| Keywords: | tidal current energy turbine; installation height; numerical simulation; wake characteristics |
| 分类号: | TK730.7 |
| DOI: | 10.20098/j.cnki.1001-5132.2022.0717 |
| 文献标识码: | A |
| 摘要: | 为探究水轮机的安装高度对水轮机尾流场的影响, 本文以水平轴潮流能水轮机为研究对象, 采用计算流体力学(Computational Fluid Dynamics, CFD)方法对水轮机尾流特性进行分析. 分别设置水轮机的中心距离海底高度为1.5D、2.0D、2.5D(D为水轮机直径), 对水轮机尾流场的轴向、径向上的速度亏损以及涡量结构图进行分析. 研究结果表明: 安装高度为1.5D时, 约在下游轴向位置X/D=15(X为轴向距离)处, 梢涡与海底碰撞导致涡结构发生破损, 这也使得该工况在下游X/D=15后的速度亏损明显大于安装高度2.0D和2.5D, 而安装高度为2.0D和2.5D的工况的速度变化基本一致. 同时从3种工况不同轴向位置速度亏损图可以看出, 从下游X/D=10开始, 最大亏损速度均出现在中心轴线的位置. 因此在考虑到对下游流场的影响和安装的成本时, 建议安装高度为2.0D. |
| Abstract: | In order to explore the influence of the installation height on the wake field of the turbine, this paper takes the horizontal axis tidal energy turbine as the research object, and employs the Computational Fluid Dynamics (CFD) method to analyze the wake characteristics of the turbine. The height of the center of the turbine from the seafloor was set as 1.5D, 2.0D and 2.5D respectively, where D is the diameter of the water turbine; and the velocity deficit and vorticity structure chart of the turbine wake field in the axial and radial directions were analyzed. The research results show that when the installation height is 1.5D, the collision between the tip vortex and the seafloor leads to the damage of the vortex structure at the downstream axial position X/D=15, where X is the axial distance. It also makes the velocity loss after X/D=15 downstream being significantly larger than that of the installation height of 2.0D and 2.5D. The velocity changes of the installation height of 2.0D and 2.5D are basically the same as those of the installation height of 1.5D. It can be seen from the velocity deficit diagrams of different axial positions under the three working conditions that the maximum velocity deficit occurs at the central axis starting from the downstream X/D=10. Considering the impact on the downstream flow field and the cost of installation, the installation height is recommended to be 2.0D. |
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| 备注/Memo: | 收稿日期: 2022－08－01. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 国家自然科学基金（52171263）; 宁波市“科技创新2025”重大专项（2020Z076）.第一作者: 王烨（1998－）, 女, 浙江嘉兴人, 在读硕士研究生, 主要研究方向: 流体机械仿真研究. E-mail: wy68163101@163.com*通信作者: 李广年（1981－）, 男, 山东东平人, 博士/教授, 主要研究方向: 海洋动力能源、船舶推进. E-mail: liguangnian@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
