Q. A higher lift-to-drag ratio indicates a higher efficiency.

View solution

Q. Turbine blades use a/an _______ design.

View solution

Q. Which of the following is the governing equation for power extraction and calculation? Note that all the quantities on the right side of equation denotes a vector quantity.

View solution

Q. Why is it necessary to have an optimal tip speed ratio (TSR)?

View solution

Q. What is tip speed ratio (TSR)?

View solution

Q. What does tip speed ratio (TSR) depend on?

View solution

Q. Which of the following blade designs is becoming less popular?

View solution

Q. The airfoil/curve blade designs are affected by drag along its length.

View solution

Q. How is drag force experienced by the blade reduced in various modern blade designs?

View solution

Q. What is angle of attack?

View solution

Q. When plotting lift vs angle of attack, which of following best describes the shape of the curve?

View solution

Q. There is no ideal angle of attack for best rotation.

View solution

Q. The speed at the tip of the blade is faster than its center.

View solution

Q. What is the angle by which the rotor blades are twisted?

View solution

Q. Which of the following blade designs further increases the efficiency of airfoil blades?

View solution

Q. Why is a blade twisted along its length rather than its width?

View solution

Q. Which of the following blade designs further increases the efficiency of airfoil blades?

View solution

Q. Why does wind speed increase with height above ground?

View solution

Q. Increased wind tower height and longer blades do not result in an increase in power.

View solution

Q. Why should longer turbine blades be made of stronger materials?

View solution