Wind turbine blade windward side

Why do wind turbines have a negative blade installation angle?

In the case of low wind speeds, a wind turbine with forward-mounted blades features a negative blade installation angle, orienting the concave surface of the blade toward the windward side. This configuration enhances the obstruction of the blade to the airflow, generating a larger torque for start-up.

Can wind turbine blade load be reduced by trailing edge Windward state?

In order to investigate the technical feasibility to reduce the blade load by trailing edge windward state, the aerodynamic loads of a 30%-thickness airfoil and a commercial wind turbine blade are comprehensively evaluated by wind tunnel experiment, CFD simulation and engineering analytical model.

Do wind turbine blades perform better in a reverse direction?

When installed in the forward direction at varying wind speeds, the blades designed in this paper exhibited higher rotational speed, lower lateral lift, higher torque, superior structural stability, and increased utilisation efficiency of wind energy compared to their performance when installed in the reverse direction.

Can wind turbine blades be parked under two different states?

This phenomenon motivates the comparison of the parked loads of wind turbine blades under two different states: leading edge facing the wind and trailing edge facing the wind. Then, the feasibility of adopting the latter state under extreme conditions such as typhoons is discussed.

How do wind turbine blades affect aerodynamic characteristics?

As a result, the electromagnetic torque remains small, causing the wind turbine to experience greater acceleration and a rapid surge in speed. As the rotational speed of the wind turbine blades increases, the corresponding tip speed ratio also increases, causing the aerodynamic characteristics to develop in a more favourable direction.

Can wind turbine blades be parked under typhoons?

In order to improve the safety and reliability of wind turbine blades under extreme wind conditions such as typhoons, this paper aims to verify the technical feasibility of a new parked strategy of wind turbine blade, i.e., the trailing edge windward state. The structure of this paper is as follows.