Wind turbine aerodynamics and loads control in wind shear flow

Shen, Xueju; Zhu, Xiaocheng; Du, Zhaohui

doi:10.1016/j.energy.2011.01.028

Cited by 91 publications

(36 citation statements)

References 22 publications

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“…Different researchers have assumed different wind load distributions along the blade. Some assumed uniform distribution of the load while others applied concentrated load at the tip [12][13][14]. The last mentioned loading form results in very low bending moment at the tip.…”

Section: Cad Integrated Simulationmentioning

confidence: 99%

Advances in numerical computation based mechanical system design and simulation

Lemu

2015

Adv. Manuf.

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This paper highlights the available numerical computation techniques in mechanical engineering field with focus on application of modeling and simulation within renewable energy conversion machines as a particular research case. The study makes special focus on simulation approaches based on finite elements and multibody dynamics that are currently focused within the research community. Developing the simulation model in a computer-aided design (CAD) tool is a precondition for a successful simulation-based mechanical system research. The article discusses and elaborates the methods implemented to integrate design data with other computer-aided engineering functions. The motivation is the fact that simulation-based research is useful for design optimization of mechanical systems that operate in harsh and unfriendly environment where conducting physical testing of prototypes is difficult. In addition, the manufacturing environment is benefiting from the developments in numerical computation techniques through machining simulation that significantly reduce the time-to-market and thus increase competitiveness. The study is also intended to explore the existing gaps of capabilities in current approaches in application of computational techniques in order to draw attention to future challenges and trends.

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Section: Cad Integrated Simulationmentioning

confidence: 99%

Advances in numerical computation based mechanical system design and simulation

Lemu

2015

Adv. Manuf.

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“…Much work has been done in recent years on the design and development of traditional wind turbines to improve their performance. For example, Shen et al [10] investigated the edge and flap-wise moments on horizontal axis wind turbine blade roots in wind shear conditions, and pointed out that IPC (individual pitch control) could be used to improve the rotor yaw and tilt moments, to stabilize the power output, and to prolong the lifespan of wind rotor components. Qamar et al [11] presented the DNS (direct numerical simulation) to research a full stationary wind-turbine blade at Re ¼ 10,000 and zero-incidence.…”

Section: Introductionmentioning

confidence: 98%

Design of wind turbines with shroud and lobed ejectors for efficient utilization of low-grade wind energy

Han

Yan

Han

et al. 2015

Energy

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“…Nevertheless, long blades are flexible and they are likely to experience edge-wise and flap-wise deflections especially in high varying wind speed. Staino and Basu and Shen et al [18,23] have revealed that edge-wise mode vibrations have little or none aerodynamic dumping, while flapwise mode vibrations are aerodynamically dumped, thereby, edgewise can induce instabilities while the flapwise contribute to fatigue damage.…”

Section: Fatigue Loadmentioning

confidence: 99%

Fatigue Loads Mitigation on Horizontal Axis Wind Turbines Using Aerodynamic Devices. A Survey

Muiruri¹,

Motsamai²

2017

JESTR

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The paper presents overview of source loads and aerodynamic techniques that are feasible for fatigue load reduction on large horizontal axis wind turbines. The article highlights the effects of increasing wind turbine rotor diameter on fatigue load, and feasible aerodynamic techniques that can be employed to reduce fatigue load. Increased in fatigue load is critical as current and future horizontal wind turbines are designed of large rotor blades. Increase in size of wind turbines has been elicited by highly demand for clean energy nowadays as well as need to decrease the cost of energy per kilo watt. As the rotor diameter increases in size, so do effects of air loads acting on the blades. The pitch control systems installed with a purpose of controlling such effects are approaching their capability limits. They are unable to dump sudden, high varying air loads associated with fluctuating wind speed on time. As these effects occur repeatedly during operation of wind turbines, they can cause premature failure or permanent damage of major components due to fatigue load accumulation. In overall, the service life of wind turbine can drastically reduce or high operational and maintenance costs are likely to rise up due to frequent downfalls of unplanned maintenance schedules. Therefore, alternative methods rather than pitch control are reviewed that can improve wind turbines efficiency. The paper concludes by analyzing possible opportunities in future.

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Wind turbine aerodynamics and loads control in wind shear flow

Cited by 91 publications

References 22 publications

Advances in numerical computation based mechanical system design and simulation

Advances in numerical computation based mechanical system design and simulation

Design of wind turbines with shroud and lobed ejectors for efficient utilization of low-grade wind energy

Fatigue Loads Mitigation on Horizontal Axis Wind Turbines Using Aerodynamic Devices. A Survey

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