导流板对Savonius型海流发电叶轮的影响分析

宋保维; 杨 莼; 田文龙

doi:10.11993/j.issn.1673-1948.2013.01.001

导流板对Savonius型海流发电叶轮的影响分析

doi: 10.11993/j.issn.1673-1948.2013.01.001

西北工业大学航海学院, 陕西西安, 710072

基金项目: 国家自然科学基金项目(51179159); 高等学校博士学科点专项科研基金(20116102110009).

详细信息

作者简介:
宋保维(1963-), 男, 教授, 博士生导师, 研究方向为水下航行器总体设计技术、减阻降噪技术、可靠性优化设计与评定技术和多学科设计优化技术等.

中图分类号: TJ630.1; TK737
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出版历程
- 收稿日期: 2012-10-10
- 修回日期: 2012-11-05
- 刊出日期: 2013-02-20

Influence of Bafflers on Savonius Impeller of Ocean Current Generator

College of Marine Engineering, Northwestern Polytechnical University, Xi′an 710072, China

摘要

摘要: Savonius型叶轮是应用最广泛的海流发电叶轮之一, 其成本低、自启动性较好, 但是发电效率较低。为了提高Savonius叶轮的发电效率, 提出了在Savonius叶片上增加3块导流板的新型垂直轴式叶轮的设计方案。为了探索导流板对叶轮的发电性能影响, 利用商业计算流体力学(CFD)软件FLUENT分析了叶轮在不同旋转速度下的发电特性, 采用滑移网格技术对叶轮进行了2D非定常数值流体计算, 分析了在工作环境下叶轮的速度场、压力场的基本特点。计算结果表明, 该叶轮在尖速比λ=0.9时获得最大平均功率系数0.481, 其发电效率大约比Savonius叶轮高10%～20%左右。
- 垂直轴式叶轮 /
- Savonius叶轮 /
- 导流板 /
- 滑移网格 /
- 计算流体力学
Abstract: Savonius impeller is widely used in ocean current generator, which has the advantages of low cost and good starting characteristics but lower efficiency. In this study, a novel vertical axis turbine (VAT) is designed by adding three bafflers to a Savoinius blade to improve its power generation efficiency. The output characteristics of the VAT at different rotary speed are analyzed with commercial computational fluid dynamics (CFD) software FLUENT to under-stand the influence of the bafflers on the power generation performance of the turbine impeller. The two-dimensional unsteady flow of the impeller is computed by using sliding mesh, and the basic features of speed field, pressure field, etc. of the impeller under working condition are analyzed. The results show that the maximum averaged power generation coefficient of the propeller reaches 0.481 when the tip speed ratio λ=0.9, which is 10% to 20% higher than that of the Savonius impeller.
- vertical axis turbine impeller /
- Savonius impeller /
- baffler /
- sliding mesh /
- computational fluid dynamics(CFD)

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参考文献(7)

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