| 项目编号: | 1437988
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| 项目名称: | Nonlinear analysis of flow-induced instabilities of wind turbine blades using theoretical models and supported by experimental data |
| 作者: | Yahya Modarres-Sadeghi
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| 承担单位: | University of Massachusetts Amherst
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD280602
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | wind turbine
; wind turbine blade
; blade
; flow-induced instability
; model
; wind farm
; offshore wind energy
; nonlinear analysis
; slender blade
; flow-induced
; instability
; north american wind energy academy
; troublesome instability
; nonlinear model
; wind tunnel experiment
; nonlinear system modeling
; nonlinear instability
; comprehensive model
; theoretical model
; advanced computational model
; fully-coupled continuous fluid-structure interaction model
; fluid-structure
; principal investigator
; blade shape
; unwanted blade oscillation
; turbine rotor blade
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| 英文摘要: | Principal Investigator: Yahya Modarres-Sadeghi
Number: 1437988
Title: Nonlinear analysis of flow-induced instabilities of wind turbine blades using theoretical models and supported by experimental data
Institution: University of Massachusetts, Amherst
Increasingly, wind farms for the production electricity are being sited off shore to harvest this renewable energy resource. The available energy that individual wind turbines within the wind farm may extract is proportional to the swept area of the turbine rotor blades, creating a powerful incentive to design, manufacture, and commercially use longer and more slender blades. This trend is driven by economics - wind farm installation costs are substantially higher offshore than onshore, and so increased energy production per installed wind turbine is crucial for cost-effective offshore wind energy. However, as blades become longer and more slender, they become more susceptible to various flow induced instabilities. A particularly troublesome instability is the unwanted blade oscillations, or flutter, caused by the interaction of the blade with the wind. This unstable behavior can lead to catastrophic failure of the blades. This limitation poses a threat to the integrity of offshore wind turbines and their ability to reliably operate. In the current research, flow-induced instabilities of wind turbine blades will be studied using advanced computational models based on a technique called nonlinear analysis in order to better understand these instabilities and develop guidelines for the design of future wind turbine blades. As part of the proposed activities, the principal investigator will organize a session at the North American Wind Energy Academy (NAWEA) on Offshore Wind Energy, develop YouTube presentations on wind turbines targeted to middle and high school students, and give demonstrations to local high school students on the same topic.
Technical Description
The goal of this research is to develop a nonlinear, fully-coupled continuous fluid-structure interaction model for flexible and rotating wind turbine blades. This model will be used to study flow-induced instabilities for long and slender blades that are anticipated to be used in future shore wind turbines. A wind turbine blade is an inherently three-dimensional and nonlinear system. Nevertheless, current approaches for wind turbine blade instability analysis have modeled the blades as two-dimensional, linear systems in order to bypass the difficulties associated with three-dimensional, nonlinear system modeling. However, as blades become longer and more slender, the need for more comprehensive models is necessary. The proposed nonlinear model for flexible and rotating blades will account for varying blade shapes and cross-sections, as well as bending and torsional properties. Geometric, flow-related and fluid-structure interaction nonlinearities will be embedded into the model. A comprehensive series of wind tunnel experiments will be conducted to validate this model. The validated model will then be used to provide a fundamental understanding of flow-induced instabilities of wind turbine blades. This approach will also enable the study of nonlinear instability of flexible structures with non-uniform properties along their length under highly nonlinear interaction with flow, and thus provide a broader understanding of the physics underlying nonlinear fluid-structure interaction systems. With respect to education and broader impacts, the principal investigator will organize a session at the North American Wind Energy Academy (NAWEA) on Offshore Wind Energy. Outreach activities include development of YouTube presentations on wind turbines targeted to middle and high school students, and demonstrations to local high school students on the same topic. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95862
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Yahya Modarres-Sadeghi. Nonlinear analysis of flow-induced instabilities of wind turbine blades using theoretical models and supported by experimental data. 2013-01-01.
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