Design of Wind Turbine Blade with Thick Airfoils and Flatback and its Aerodynamic Characteristic
large-scaled blade has posed many problems related to design and production. After introducing the features of blade with thick airfoils and flatback, based on relevant parameters of Huaren 100 kW wind turbine, the paper designed blade with thick airfoils and flatback, introduced blade parameter design, and analyzed the aerodynamic performance of blades using GH bladed software, obtaining the relationship between power output of wind turbine with blade tip speed ratio Cp. Furthermore, it analyzed the aerodynamic performance of original design blades, modified blades and Huaren 100 kW blades, and assessed the aerodynamic performance of modified blade.
The Analysis Study Of The Effect Of Airfoil Thickness Variation On The Performance Of Wind Turbine
The wind blade is the first responsible of harvesting the kinetic energy of wind. It have an aerodynamic shape that pushes it to rotate during airflow. This work is an investigation study about the effect of variation of airfoil thickness. Two airfoil is included with deferent value of thickness. Start by the value 6% to 32% of chord length. The 4 digits NACA airfoil used is $(24\mathrm {X}\mathrm {X})$ and 5 digits NACA airfoil used is $(230\mathrm {X}\mathrm {X})$. The wind turbine studied is intended to install in Adrar province site. The performance analysis is based on blade element momentum theory. The results show that for each airfoil have an effective thickness range. In this range the production of energy is the maximum value. Over this range the production decreases to the low value.
Full scale testing of wind turbine blade to failure - flapwise loading
A 25m wind turbine blade was tested to failure when subjected to a flapwise load. With the test setup, it was possible to test the blade to failure at three different locations. The objective of these tests is to learn about how a wind turbine blade fails when exposed to a large flapwise load and how failures propagate. The report shows also results from ultra sonic scan of the surface of the blade and it is seen to be very useful for the detection of defects, especially in the layer between the skin laminate and the load carrying main spar. Acoustic emission was successfully used as sensor for the detection of damages in the blade during the test. The report contains measurements of the total deflection of the blade, the local deflection of the skin and the load carrying main spar and also measurement of strain all as a function of the applied load and up to failure of the blade. The “post mortem” analysis and description of how the damages propagate during the tests are reported in a separate report [2]. ISBN 87-550-3181-1 ISBN 87-550-3183-8(Internet) ISSN 0106-2840 Print: Pitney Bowes Management Services Denmark A/S