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Structural analysis of wind blades with and withoutpower control


B. Kouadria
M. Debbache

Abstract

The blade is the principal element in the wind rotor mechanism. the efficiency of the wind turbine depends on the optimal geometry of  this element, as well as its structural configuration. This work presents a contribution to wind blade structural design. the blade structure  was evaluated without the control power operating case and with the power control case. In this case, an 80KW horizontal axis wind  turbine design was proposed. the process begins with design and aerodynamicanalysis based on blade element momentum theory by  using Qblade software to determine the blade geometry. The blade structure was defined by the NuMad package, it is composed of two  parts. the shell part is four layers of composite materials and the rib part has a sandwich panel shape. The evolution of structure was  done by the Co-Blade package. The results show a decreasing in displacement decreased to 64% at the tip of the blades which leads to  the stress at the leading and trailing edge being negligible. That proves the importance of a control power system in the protection of the  blade structure and turbine generator in the operating case under high wind velocity and ensures the stability of the power output  value.


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eISSN: 2543-3717