The anemometer, also known as a wind speed meter, is a general term for instruments used to measure the speed of winds in the air, which is the point with the highest gas density.
Anemometers have a very wide range of uses, from weather forecasts and reports to aircraft, wind turbines, air conditioning, ventilation systems, education, research, and even personal uses. Additionally, anemometers can be used to obtain information in many fields.
Anemometers, which come in many types depending on different needs and preferences, allow the measurement of airspeed from air currents with very low speeds to currents so strong that they can exceed the speed of sound.
Since it is not possible to measure the speed of gases directly in a concrete way, in gas measurements, the effect of the gas on substances is usually measured and a result is reached.
Wind speed must be calculated considering many variables and parameters. It is necessary to examine many different evaluation points, such as the amount of energy generated as a result of wind force, the relationship between the cooling speed of hot objects and the gases in the environment, pressure changes caused by gas speed, and the effect of pressure and speed changes on sound.
Anemometers that operate on the principle of converting wind into electrical energy can be seen in the form of cup anemometers or propeller anemometers. Cup anemometers measure speeds in the range of 7 to 160 km/h, while propeller anemometers are effective only in the range of 1.6 to 40 km/h.
There are three types of anemometers that measure speed through the relationship between heat and wind speed. Two of these three types perform measurements using a heated thin wire. In one measurement, the cooling speed of the wire is observed, while in the other, the energy required to keep the body temperature constant under the influence of the wind is converted into speed. The third heat-utilizing anemometer performs calculations based on the cooling speed of alcohol. This anemometer is used to measure speeds below 8 km/h.
Another type of anemometer performs calculations based on the pressure of the wind speed. In these types of anemometers, systems in the form of tubes with one end open and one end closed or with both ends open are used.
In applications that use tubes with one end open and one end closed, the pressure generated by the wind inside the tube is calculated differently from the external pressure. This structure, capable of measuring very strong and fast air currents, is used in flight zones and wind tunnels. Some of these anemometers can even measure gas speeds exceeding the speed of sound with certain regulations.
