anemometer

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anemometer:

see windwind,
flow of air relative to the earth's surface. A wind is named according to the point of the compass from which it blows, e.g., a wind blowing from the north is a north wind.
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Anemometer

An instrument to measure the speed or velocity of gases either in a contained flow, such as airflow in a duct, or in unconfined flows, such as atmospheric wind. To determine the velocity, an anemometer detects change in some physical property of the fluid or the effect of the fluid on a mechanical device inserted into the flow.

An anemometer can measure the total velocity magnitude, the velocity magnitude in a plane, or the velocity component in a particular direction. The cup anemometer, for example, measures the velocity in a plane perpendicular to the axis of its rotation cups. If the cup anemometer is mounted with the shaft perpendicular to the horizontal, it will measure only the component of the wind that is parallel to the ground. Other anemometers, such as the pitot-static tube, are used with the tip aligned with the total velocity vector. Before using an anemometer, it is important to determine how it should be positioned and what component of the total velocity its measurement represents.

An anemometer usually measures gas flows that are turbulent. The cup anemo meter, pitot-static tube, and thermal anemometer are mostly used to measure the mean velocity, while the hot-wire, laser Doppler, and sonic anemometers are usually used when turbulence characteristics are being measured. (The term “thermal anemometer” is often used to mean any anemometer that uses a relationship between heat transfer and velocity to determine velocity.)

anemometer

[‚an·ə′mäm·əd·ər]
(engineering)
A device which measures air speed.

anemometer

An instrument for measuring the velocity of airflow.

anemometer

An instrument to measure wind velocity. The common cup type of anemometer consists of three or more hemispherical cups extending on horizontal arms from a vertical shaft or spindle. The higher the speed, the faster the cups will rotate. By suitable gearing, a pointer indicates the speed.

anemometer

an instrument for recording the speed and often the direction of winds
References in periodicals archive ?
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Flow meters and anemometers present challenges to bearing technology.
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Our decision to purchase Triton was based on its high correlation to anemometer data, excellent reliability and ease of deployment," says Simon Brillet, VALOREM's Research Director.
The commonly used methods at present and the potential techniques for the near future for indoor airflow measurements include rotating vane anemometers, thermal anemometers, ultrasonic anemometers, Laser-Doppler velocimetry, visualization techniques, particle image velocimetry, particle tracking velocimetry, and molecular tagging velocimetry.
We believe that permission to site more anemometers in the area should not be granted until the outcome of the inquiry has been determined.
The new thermal anemometers have intuitive operation and a large display for viewing of measurements.
Instruments such as hot-wire anemometers and manometer/pitot tubes are most often used.
From sailors to scientists, kite flyers to foresters, and pilots to golfers, the Kestrel 1000 and 2000 anemometers are being appreciated for their convenience and accuracy.
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The major product segments analyzed are Differential Pressure Flow Meters, Magnetic Flow Meters, Mass Flow Meters, Open Channel Flow Meters, Positive Displacement Flow Meters, Turbine Flow Meters, Ultrasonic Flow Meters, Anemometers, and Vortex Flow Meters.
The idea is to use feed-forward control from an up-stream-looking laser windsensorto control the direction the turbine is pointing ( yaw ) and the blade pitch, rather than feed-back control wind vanes from and anemometers on top of the nacelle behind the blades.

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