Assalamualaikum :)
For this week, I want to discuss about the blades design that suitable and effective for this mini wind turbine project. There are many several factor that need to be caution because it will effect the progress of the wind turbine.
BLADES DESIGNFor this week, I want to discuss about the blades design that suitable and effective for this mini wind turbine project. There are many several factor that need to be caution because it will effect the progress of the wind turbine.
Use aluminium and composite materials in their blades has
contributed to low rotational inertia, which means that newer wind turbines can
accelerate quickly if the winds pick up, keeping the tip ratio more nearly
constant.
The speed and torque at which a wind turbine rotates must be controlled
for several reasons:
·
To optimize the aerodynamic efficiency
of the rotor in light winds.
·
To keep the generator within its speed
and torque limits.
· To keep the rotor and hub within their
centrifugal force limits.
·
To keep the rotor and tower within
their strength limits.
·
To reduce noise.
BLADE COUNT
BLADE COUNT
- The determination of the number of blades involves design considerations of aerodynamic efficiency, component costs, and system reliability.
- Aerodynamic efficiency increases with number of blades but with diminishing return.
- Component costs that are affected by blade count are primarily for materials and manufacturing of the turbine rotor and drive train.
- System reliability is affected by blade count primarily through the dynamic loading of the rotor into the drive train and tower systems..
- Finally, aesthetics can be considered a factor in that some people find that the three-bladed rotor is more pleasing to look at than a one- or two-bladed rotor.
- Wood and canvas sails were used on early windmills due to their low price, availability, and ease of manufacture. Smaller blades can be made from light metals such as aluminium.
