Sumários
The Glauert Model
1 outubro 2015, 15:00 • 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.
Review of aerofoil theory
24 setembro 2015, 17:30 • José Alberto Caiado Falcão de Campos
2D Aerofoils. Wing geometry.Geometry of aerofoils: Camber, thickness. Lift and Drag. The circulation theory. The Kutta Joukowski law. Joukowski foils: Effects of angle of attack, thickness and camber.Design of foils: The NACA series. Effects of viscosity. Boundary layer separation. Lift and Drag data. Static and Dynamic stall.
The General Momentum Theory
24 setembro 2015, 15:00 • 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.
Axial Momentum Theory for a Turbine Rotor
18 setembro 2015, 17:00 • José Alberto Caiado Falcão de Campos
The actuator disc concept. Conservation of mass, momentum and energy. The axial induction factors. The thrust and power coefficient. The Betz limit. Turbine efficiency. Limitations of the model.