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

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 ?
The saving grace is the current model smartly comes with a stiffener to keep the anemometer anchored vertically, but it really needs a cleaner Lightning plug option, in my view.
The experiment was conducted with FM-1000, diffuser, and anemometer or flowmeter in series.
Moreover, the consideration that a surface vehicle travels through the atmospheric boundary layer is treated analytically to evaluate the effect of the vertical position of a vehicle-mounted anemometer on the prediction of free-stream velocity.
A notable program under this office is an "anemometer loan program" that provides an anemometer and the necessary equipment needed to measure wind resources to individuals who are interested in installing a wind turbine on their property.
The price of a rotating vane anemometer ranges from less than $100 to $1000 at present.
A more accurate way to measure wind speed is with an instrument called an anemometer.
Andrew Smith, 13, who has autism, demonstrates his paper-cup anemometer, a wind-gauge machine in front of his class at Capt.
1% of setting--this benchtop unit offers easy anemometer mounting, built-in electronics, and a 102 mm (4-in.
The text suggests ways of duplicating Leonardo's glider, tank, catapult, anemometer, and bicycle with ordinary art and craft tools found at home and school.
These concepts are clarified via activities such as building an anemometer (to monitor the wind) and a psychrometer (to measure relative humidity).
Sensing of fluid flow is demonstrated by measuring a change in the large signal resistance of the microheater analogous to a hot wire anemometer with a detection limit of [+ or -] 320 pL/s.
Stormchasers imparts directions for creating a weather station complete with anemometer, barometer and rain gauge.