Main Applications of Anemometers
An anemometer is an instrument that measures air velocity. There are many types of it, and the most commonly used one in meteorological stations is the wind cup anemometer;
It consists of three parabolic cone empty cups fixed on the bracket at 120° to each other to form the induction part. The concave surfaces of the empty cups are all in one direction.
The entire induction part is installed on a vertical rotating shaft. Under the action of wind force, the wind cup rotates around the shaft at a speed proportional to the wind speed.
Another rotary anemometer is the propeller anemometer, which consists of a three-blade or four-blade propeller as the sensing part;
Install it on the front end of a wind vane so that it is aligned with the direction of the wind at any time. The blades rotate around a horizontal axis at a speed proportional to the wind speed.
The anemometer has a wide range of applications and can be used flexibly in all fields. It is widely used in electric power, steel, petrochemical, energy-saving and other industries;
There are other applications in the Beijing Olympic Games, such as sailing competitions, rowing competitions, field shooting competitions, etc., all need to use anemometers to measure.
The current anemometers are relatively advanced. In addition to measuring wind speed, they can also measure wind temperature and air volume.
There are many industries that need to use anemometers, recommended industries: fishing industry, various fan manufacturing industries, industries that require ventilation and exhaust systems, etc.
The main purpose of the anemometer:
1. Measure the velocity and direction of the average flow.
2. Measure the pulsation velocity and frequency spectrum of the incoming flow.
3. Measure the Reynolds stress in turbulent flow and the velocity dependence and time dependence of two points.
4. Measure wall shear stress (usually by using a hot film probe placed flush with the wall, the principle is similar to that of dedicated line speed measurement).
5. Measure the fluid temperature (measure the change curve of the probe resistance with the fluid temperature in advance, and then determine the temperature according to the measured probe resistance.
