[PDF] Aerodynamic Performance Assessment of Wind Turbine Composite Blades Using Corrected Blade Element Momentum Method
C Zhang, HP Chen
Aerodynamic loads for MW scale horizontal wind turbine blades are calculated
and analysed in this paper. The blade element momentum (BEM) method is employed
for analysing the performance of wind turbine blades. However, research shows that
the thrust coefficient predicted by BEM method is significantly from the experimental
data, when the value of axial induction factor is greater than 0.4. To solve this problem
and to increase the accuracy of the prediction, some correction models such as
Glauert’s and Shen’s approaches should be utilised in the equations of thrust
coefficient with loss factor. A numerical example of Sandia SNL100-00 wind turbine
blade is adopted to estimate the aerodynamic performance under various wind speeds.
Three different BEM methods are discussed, including the BEM method without
correction, with Prandtl-Glauert’s correction and with Shen’s correction. The predicted
curves for a wide range of wind speeds obtained from different BEM models are
compared with the results by QBlade, which is an open source software for wind
turbine analyses. The results show that the BEM method with Shen’s correction gives
the best correlation to the data of QBlade, which are useful for analysing the
aerodynamic performance of wind turbine blades.
C Zhang, HP Chen
Aerodynamic loads for MW scale horizontal wind turbine blades are calculated
and analysed in this paper. The blade element momentum (BEM) method is employed
for analysing the performance of wind turbine blades. However, research shows that
the thrust coefficient predicted by BEM method is significantly from the experimental
data, when the value of axial induction factor is greater than 0.4. To solve this problem
and to increase the accuracy of the prediction, some correction models such as
Glauert’s and Shen’s approaches should be utilised in the equations of thrust
coefficient with loss factor. A numerical example of Sandia SNL100-00 wind turbine
blade is adopted to estimate the aerodynamic performance under various wind speeds.
Three different BEM methods are discussed, including the BEM method without
correction, with Prandtl-Glauert’s correction and with Shen’s correction. The predicted
curves for a wide range of wind speeds obtained from different BEM models are
compared with the results by QBlade, which is an open source software for wind
turbine analyses. The results show that the BEM method with Shen’s correction gives
the best correlation to the data of QBlade, which are useful for analysing the
aerodynamic performance of wind turbine blades.
