Sumários

BEM Analysis of HAWT

6 outubro 2016, 14:30 • João Baltazar

BEM assignment.

Vertical Axis Turbines

30 setembro 2016, 17:00 • José Alberto Caiado Falcão de Campos

Vertical axis turbines – Application examples and working principle. Velocity Triangles, forces analysis, and generated power. Actuating disc theory: single stream-tube and multiple stream-tube analysis; induction factor. Other theories: vortex analysis. High-angle of attack aerodynamics.

The Blade Element Momentum Theory of a HAWT

29 setembro 2016, 18:00 • José Alberto Caiado Falcão de Campos

 The inviscid Glauert model. The energy equation. The velocity and force diagram. The maximum power The effect of drag: Viscous losses. The effect of finite blade number.

Aerodynamics of aerofoils and lifting surfaces

29 setembro 2016, 14:30 • José Alberto Caiado Falcão de Campos

Brief review of aerofois and lifting surfaces. Geometry: camber and thickhess of aerofoils. The principles of circulation theory. The Kutta-Joukowsky law..

The Joukowsky profiles. Flow and lift characteristics. Ilustration of the effects of camber, thickness and angle of attack. Lift and drag experimental data. Foils for wind turbines. Static and dynamic stall.

The General Momentum Theory

23 setembro 2016, 17:00 • José Alberto Caiado Falcão de Campos

The General Momentum Theory of a HAWT. Actuator disc with variable load. The optimum distribution. The rotational momentum. Rotational induction factors. Expressions for thrust and torque. The energy equation. Axial and rotational kinetic energy losses.