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 ?
Also, Julesburg has installed another anemometer on a 145 tower near the original site, in order to determine if a larger wind turbine installation would be feasible.
8 kilometres from the reference mast, using a beam elevation angle of 3 degrees, and targeting the top mounted anemometers of the mast at 100 metres above ground.
A recent planning application for an 80m tall anemometer in Northumberland has been rejected after concerns from local councillors that it was a precursor to the erection of a wind farm.
OEMC has seven wind anemometers loaned throughout the state that gather wind data for analysis.
On Tuesday, <c March 14>, Castle Morpeth councillors are expected to approve the application for the anemometer, despite objections from local people and parish councillors in Longhirst and nearby Hebron.
Tenders are invited for Supply Of Data Logger, Anemometer With Measnet Calibrated, Wind Vane Etc.
Yesterday Hertfordshire-based RES UK said it was disappointed with the ruling by Castle Morpeth Council's development services committee, but would evaluate the full reasons for rejecting the proposed anemometer before deciding whether to appeal.
Proposal: Temporary anemometer pole, 50 metres tall, guyed to a maximum radius of 30 metres, for a period of two years at site between South Moor plantation and Victory Wood, north of South Charlton, Alnwick.
The evaluation process involves erecting 150 foot towers on each site, and placing an instrument called an anemometer on top of each tower to monitor the speed, direction and duration of the wind at that site.
Brief Description of the Goods: Scriber straight 150mm, tweezer, Side Cutting Plier, Steel measuring tape, Hammer, Immersion Heater, first Aid Box, Analog multimeter, Digital Multimeters, Digital IC Tester, Fire Extinguisher, DC regulated power supply, LCR Meter, Digital IC trainer, Hand Glove and mask, Screw driver, Safety Goggles, Fire extinguisher, Hydraulic pressure machine, Electric PPR pipe, electric pump, Anemometer, Gas leak detector, Tool Kit(Hand Tools), Broad Band Connection or Wi-Fi etc.
Solicitation: Integrated co2 and h2o open-path gas analyzer and 3-d anemometer with eb enhanced barometer and carrying case
Proposal: Erection and operation of 50m high wind monitoring mast with cup anemometer and data logger for purposes of re-coding wind speed and direction for the period of 24 months at land at Thockrington Farm, Thockrington, Colwell, Hexham, Northumberland.