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 ?
Notwithstanding, this anemometric data was used to test the proposed method, recognizing that these conditions are a challenging test of the technique.
More recently, the EPA has proposed a new regulation [4] prescribing that the vehicle-mounted anemometer be installed one metre above the leading edge of a HDV trailer and that it shall be calibrated against track-based anemometric readings taken at vehicle mid-height.
The present work addressed specifically the issue of predicting the free-stream velocity from ground-based anemometric measurements, with the end objective of enhancing the reliability and accuracy of the prediction of free-stream conditions, in order to improve the accuracy of [C.
The results indicate that installing the vehicle-based anemometer at a height different than the vehicle reference measurement height would lead to unreliable and unrepeatable correspondence between ground-based and vehicle-based anemometric data.
Only the anemometric data from anemometers located on the windward side of the test track should be used for predictive purposes.
The novel method proposed herein has the potential to improve the reliability and accuracy of the prediction of free-stream velocity from ground-based anemometric measurements, with the concomitant improvement of the accuracy of drag coefficient assessments.

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