Aerodynamic shape optimized design for wind turbine blade using new airfoil series

Abstract

This paper introduces a new airfoil series to optimize the aerodynamic shape of wind turbine blades. It is verified that the CQU-A airfoil series exhibits high aerodynamic performance by using the wind tunnel experimental data and RFOIL. The geometry of a 2 MW wind turbine blade with new airfoil families is designed preliminarily based on the shape of Tjaereborg 2 MW rotor. A multi-objective optimized model combining the maximum power coefficient of the wind turbine with minimum area of the blade surface is proposed for the pitch regulated wind turbine. An optimized code is developed based on the corrected blade element momentum (BEM) theory and particle swarm optimization (PSO) algorithm. The optimization results show that, compared with that of the original rotor and the Tjaereborg rotor, not only the power coefficient and annual power production is improved, but also the area of the blade surface is reduced. The decreased area indicates that the mass of the optimized blades is reduced. It is beneficial for increasing the fatigue life and reducing cost of composite materials if the internal structure of the wind turbine blades is unchanged. Furthermore, the load of the blade root is effectively controlled by using this alternative optimization program.

Different functionalized chord and twist distributions in aerodynamic design of HAWTs

“…Wang et al . optimized aerodynamic shape of blades by introducing new series of airfoils. This optimization method will maximize power coefficient and minimize blade surface area.…”

“…They used linear fit approximation for chord length and twist angle distribution to ease manufacturing and compared the results with nonlinear distribution of chord and twist angle obtained by classic BEM design. Wang et al [14] optimized aerodynamic shape of blades by introducing new series of airfoils. This optimization method will maximize power coefficient and minimize blade surface area.…”

Multi-objective optimization of tooth surface based on minimum of flash temperature and vibration acceleration root mean square

“…The following point worthy to mention was that the research was based on deterministic methods and accounted for the inevitable randomness of process parameter variations of tooth modification amounts. [13][14][15] As far as several typical practical examples are concerned, tooth modification amounts are random variations due to manufacturing and installing errors as well as several objective physical quantities, which may make gear deterministic modification simplification and thus will improve the effectiveness of tooth modifications on gear performances. Some studies had been proved that through modifying addendum and dedendum, teeth meshing performance could be effectively improved, meshing impact being decreased, noise being reduced, and loading capacity being increased because of teeth surface load uniformly distributing.…”

Response Surface Based Optimization of Aerodynamic Performance of a Horizontal Axis Wind Turbine

“…The aerodynamic efficiency of a wind turbine is substantially influenced by the aerodynamic shape of wind turbine blades. The taper and twist distributions along the blade span, and cross section profiles of the wind turbines were optimized in earlier studies to maximize the aerodynamic efficiency [3][4]. To reduce the computational cost associated with optimization, response surface approximations can be used to relate the turbine blade design variables to aerodynamic performance metrics [5].…”