Anemometer for parsing
anemometer USES analytic
anemometer is what? Anemometer just as its name implies is an instrument for measuring air velocity. Its sort is more, meteorological offices and stations zui commonly used for cup anemometer wind, it is composed of three to 120 & deg; Fixed on the bracket of the parabolic taper part of induction, the empty cup empty cup of concave forward a direction. The induction part installed on a vertical axis, in under the action of wind, the wind cup axis is proportional to the speed of the wind speed to rotate. Another rotating anemometer is propeller type anemometer, composed by a 3 leaf or four propellers induction part, install it in a bellwether of the front, to make it at any time on the wind. Blade around the horizontal axis is proportional to the speed of the wind speed to rotate. The characteristics of the anemometer?
1, small volume, little interference flow field;
2, wide applicable scope. Not only can be used in the gas can also be used for liquid, gas in subsonic, transonic and supersonic flow in all can use;
3, high frequency response, up to 1 MH z.
4, high measurement precision and the repeatability is good. Anemometer disadvantage is that the probe flow field have certain interference, easy to fracture.
5, in addition to measure average speed, can also be measured fluctuating value and amount of turbulence; In addition to the measurement of single direction can also be measured simultaneously multiple directions velocity component.
6, directly display volume flow. Input pipe cross-sectional area, can calculate the volume of traffic.
7, instrument has the average time period or more function, is used to calculate the average flow rate.
8, zui big value, zui small value can be shown, with the function of reading to keep.
9, calculating the average multipoint/period, keep the key, keep reading, with backlight.
10, automatic shutdown function, protect the soft cover, waterproof and dustproof, prevent collision.
the purpose of the anemometer?
1, measure the average flow velocity and direction.
2, measure to the pulsation of the flow velocity and its frequency spectrum.
3, measured stress in turbulent flow and the speed of the two correlation and time correlation.
4, measurement of wall shear stress ( Is usually used with wall is placed flush hot film probe, the principle is similar to speed) 。
5, measure fluid temperature ( Probe resistance is measured in advance along with the change of fluid temperature curve, and then according to the measured resistance can determine the temperature probe.
in addition also developed many professional purposes.