Characteristics and main uses of anemometers
Features
1. Small size, little interference to the flow field;
2. Wide range of applications. It can be used not only for gases but also for liquids, and can be used in subsonic, transonic and supersonic flows of gases
3. The frequency response is high, up to 1 MHz.
4． High measurement accuracy and good repeatability. The disadvantage of the hot-wire anemometer is that the probe interferes with the flow field to a certain extent and the hot-wire is easy to break.
5. In addition to measuring average speed, it can also measure pulsation values and turbulence amounts; in addition to measuring motion in one direction, it can also measure velocity components in multiple directions simultaneously.
The main purpose
1. Measure the speed and direction of average flow.
2. Measure the pulsation velocity and spectrum of the incoming flow.
3. Measure the Reynolds stress in turbulent flow and the velocity correlation and time correlation between two points.
4． Measure wall shear stress (usually done by using a hot film probe placed flush with the wall, the principle is similar to hot wire velocity 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 based on the measured probe resistance.
6 Precautions for Using Anemometer
1. The anemometer is prohibited from being used in flammable gas environments as it may cause fire or even explosion.
2. Please read the instructions for use before use and use the anemometer strictly in accordance with the instructions.
3. During use, if the anemometer emits abnormal smell, sound or smoke, or if liquid flows into the anemometer, please stop using it and remove the battery.
4. Do not touch the sensor part inside the probe during use.
5. Do not use volatile liquids to wipe the anemometer.
6. If the battery is not used for a long time, the battery should be removed and stored correctly. Do not press it heavily.
