Tip Speed Ratio
The tip-speed ratio, λ (lambda), or TSR for wind turbines is the ratio between the rotational speed of the tip of a blade and the actual velocity of the wind. If the velocity of the tip is exactly the same as the wind speed, the tip-speed ratio is 1.0. The tip-speed ratio is related to efficiency, with the optimum varying with blade design. Higher tip speeds result in higher noise levels and require stronger blades due to large centrifugal forces.
The tip speed of the blade can be calculated as times R, where is the rotor rotational speed in radians/second, and R is the rotor radius in meters. Therefore we can also write:
when wind speed is specified in meters/second. –
Read more about Tip Speed Ratio: Cp - λ Curves
Famous quotes containing the words tip, speed and/or ratio:
“Panache upon panache, his tails deploy
Upward and outward, in green-vented forms,
His tip a drop of water full of storms.”
—Wallace Stevens (1879–1955)
“Spig Wead: I’ve been thinking what a heel I’ve been about you and about my own kids. I don’t know, when I do something, I go all the way. Living. Gambling. Flying. I tap myself out. I guess that’s the way I want it to be. Maybe even the way I am.
Minne Wead: Star-spangled Spig. Damn the martinis, full speed ahead and don’t give up the ship.”
—Frank Fenton, William Wister Haines, co-scenarist, and John Ford. Spig Wead (John Wayne)
“A magazine or a newspaper is a shop. Each is an experiment and represents a new focus, a new ratio between commerce and intellect.”
—John Jay Chapman (1862–1933)