Abstract
The present work focuses on the effect of flutter in prebend 100 m horizontal axis wind turbine blade (HAWT) within the stability limits. The study was carried out with an advanced beam model for idyllic structure in a DU-97-W-300 cross-sectional area. A Galerkin type of approach has been applied to derive the equations, and the analysis was performed using a standard FEA code which involves the PK method and double lattice method for calculating flutter solution and aerodynamic loads respectively. The results reveal the significance of inducing prebending to improve the stability of the blade structures, and hence, the flutter velocity has moved from 11 m/s to 23 m/s. Furthermore, the output highlights the effect of prebending on the structural stability and also the flutter limit was found to be lengthened.
Highlights
A Galerkin type of approach has been applied to derive the equations, and the analysis was performed using a standard FEA code which involves the PK method and double lattice method for calculating flutter solution and aerodynamic loads respectively. e results reveal the significance of inducing prebending to improve the stability of the blade structures, and the flutter velocity has moved from 11 m/s to 23 m/s
Among various resources wind energy has outperformed its counterparts for reliable source for renewable energy resources and vast amount of research and implementation is on rise in the recent decades. e design optimization of wind turbine and blades is essential to extract more energy to meet increasing energy demand which results in study of increasing in blade size while exposing them to high load conditions; at the same time wind blades should be flexible and slender
E preliminary sciences of such instabilities like aeroelasticity, flutter instability, and relative factors have been clearly explained in [2]. e structural stability and its mathematical relation with the boundary and load conditions have been derived in [3] while, various types of dynamic instabilities and relations are detailed in [4]. e flutter instability has been found to be capable of becoming a prime design driver for future wind turbine blades and Mathematical Problems in Engineering
Summary
The Impact of Critical Flutter Velocity in Composite Wind Turbine Blade with Prebend Condition. E design optimization of wind turbine and blades is essential to extract more energy to meet increasing energy demand which results in study of increasing in blade size while exposing them to high load conditions; at the same time wind blades should be flexible and slender. Because of such slenderness issues there are multiple phenomena which tend to make the blades unstable. E preliminary sciences of such instabilities like aeroelasticity, flutter instability, and relative factors have been clearly explained in [2]. e structural stability and its mathematical relation with the boundary and load conditions have been derived in [3] while, various types of dynamic instabilities and relations are detailed in [4]. e flutter instability has been found to be capable of becoming a prime design driver for future wind turbine blades and Mathematical Problems in Engineering
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