检索结果-南通市图书馆

A Review on the Evolution of darrieus Vertical Axis Wind Turbine: Small Wind Turbines

Journal of Power and Energy Engineering 2019年第4期7卷 27-44页

作者： Palanisamy Mohan Kumar Krishnamoorthi Sivalingam Srikanth Narasimalu Teik-Cheng Lim Seeram Ramakrishna He Wei Department of Mechanical Engineering National University of Singapore Singapore City Singapore School of Science and Technology Singapore University of Social Sciences Singapore City Singapore Innovation Centre Nanyang Technological University Singapore City Singapore Singapore Institute of Manufacturing Technology Singapore city Singapore

Wind energy witnessed tremendous growth in the past decade and emerged as the most sought renewable energy source after solar energy. Though the Horizontal Axis Wind Turbines (HAWT) is preferred for multi-megawatt power generation, Vertical Axis Wind Turbines (VAWT) is as competitive as HAWT. The current study aims to summarize the development of VAWT, in particular, darrieus turbine from the past to the project that is underway. The reason for the technical challenges and past failures are discussed. Various configurations of VAWT have been assessed in terms of reliability, components and low wind speed performance. Innovative concepts and the feasibility to scale up for megawatt electricity generation, especially in offshore environments are investigated. This paper is a modest attempt to highlight the state-of-the-art information on the ongoing developments focusing on decentralized power generation. This review is envisioned as an information hub for the major developments in VAWT and its technical advancements so far.

关键词： Wind Turbine darrieus Savonius TSR Vertical Axis Wind Load Deep Stall Wake

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Performance Assessment of darrieus Turbine with Modified Trailing Edge Airfoil for Low Wind Speeds

引用

Smart Grid and Renewable Energy 2017年第12期8卷 425-439页

作者： Palanisamy Mohan Kumar Rohan Kulkarni Narasimalu Srikanth Teik-Cheng Lim Energy Research Institute Nanyang Technological University Singapore City Singapore School of Science and Technology Singapore University of Social Sciences Clementi Singapore

darrieus wind turbines are simple lift based machines with exceptionally high efficiencies in terms of power coefficient compared to similar drag based vertical axis turbines. However, in low Reynolds numbers, a notable performance loss was reported. As a potential solution, truncated NACA 0018 airfoil (NACA 0018TC-39) has been introduced with baseline cavity modification to achieve better start-up characteristics and to enhance the low wind speed performance. The baseline cavity will provide an additional benefit of reverse drag at low TSR which is obligatory for low wind speed start-up. Numerical optimization has been carried out on the conceived airfoil NACA 0018TC-39 to find out the effective truncation percentage in terms of the chord. The numerical study has been extended to compare NACA 0018 and NACA 0018TC-39 airfoil for their aerodynamic performances in terms of lift, drag coefficients and separation characteristics. The NACA 0018TC-39 airfoil was incorporated within a non-swept straight bladed darrieus turbine miniature to experimentally evaluate the performance in terms of dynamic power coefficient, dynamic torque coefficient and static torque coefficient and compared with conventional NACA 0018 airfoil at six different Reynolds numbers 178917, 193827, 208737, 223646, 238556 and 268376. The experimental contrast implied that NACA 0018TC-39 airfoil turbine yielded almost double power coefficients at low Reynolds number compared to conventional NACA 0018 airfoil without hampering its performance at higher Reynolds number.

关键词： darrieus Wind Turbine Trailing Edge Cavity Low Wind Speed and Truncated Airfoil

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

On the Mathematical Modelling of Adaptive darrieus Wind Turbine

引用

Journal of Power and Energy Engineering 2017年第12期5卷 133-158页

作者： Palanisamy Mohan Kumar Kulkarni Rohan Ajit Narasimalu Srikanth Teik-Cheng Lim Energy Research Institute @Nanyang Technological University Singapore City Singapore School of Science and Technology Singapore University of Social Sciences Singapore City Singapore

darrieus wind turbines are experiencing a renewed interest for their application in decentralized power generation and urban installation. Much attention and research efforts have been dedicated in the past to develop as an efficient standalone darrieus turbine. Despite these efforts, these vertical axis turbines are still low in efficiency compared to the horizontal axis counterparts. The current architecture of the turbine and their inherent characteristics limit their application in low wind speed areas as confirmed experimentally and computationally by past research. To enable and extend their operation for weak wind flows, a novel design of Adaptive darrieus Wind Turbine (ADWT) is proposed. The hybrid darrieus Savonius rotor with dynamically varying Savonius rotor diameter based on the wind speed enables the turbine to start, efficiently operate and stop the turbine at high winds. As the wake of Savonius rotor has a profound impact on the power performance of the combined rotor, the wake of two buckets Savonius rotor in open and closed configuration is reviewed. The current study aims to develop an analytical model to predict the power coefficient and the influence of other design parameters on the proposed design. The formulated analytical model is coded in python, and the results are obtained for the 10 kW rotor. Parametric analysis on the chord length and the diameter of the closed Savonius rotor is performed in search of an optimized diameter to maximize the annual energy output. Blade torque and the rotor torque are evaluated with respect to azimuthal angle and compared with conventional darrieus rotor. The computed results show that peak power coefficient of ADWT is 13% lower than the conventional darrieus rotor at the rated wind speed of 10 m/s.

关键词： Wind Turbine Low Wind Analytical Model darrieus Savonius Adaptive

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Φ型与H型darrieus垂直轴风力透平性能比较

引用

上海理工大学学报 2010年第3期32卷 223-226,229页

作者：潘宏林王宏光上海理工大学能源与动力工程学院上海200093

采用单盘多流管模型作为darrieus垂直轴风力透平的空气动力学性能预测模型,在相同密实度和相同高宽比的条件下,计算得到了Φ型与H型darrieus垂直轴风力透平功率系数-尖速比曲线和功率-尖速比曲线.分析了Φ型与H型darrieus垂直轴风力透... 详细信息

采用单盘多流管模型作为darrieus垂直轴风力透平的空气动力学性能预测模型,在相同密实度和相同高宽比的条件下,计算得到了Φ型与H型darrieus垂直轴风力透平功率系数-尖速比曲线和功率-尖速比曲线.分析了Φ型与H型darrieus垂直轴风力透平尖速比对功率系数及功率的影响,得到不同尖速比范围下两风力透平功率系数与功率的变化规律.

关键词：垂直轴风力透平 darrieus 尖速比功率系数

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：