The characteristics and main application of anemometer
features
1. Small size, little interference to the flow field;
2. Wide range of applications. It can be used not only for gas but also for liquid, and can be used in subsonic, transonic and supersonic flows of gases
3. High frequency response 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, and the hot wire is easy to break.
5. In addition to measuring the average velocity, it can also measure the pulsation value and turbulence; in addition to measuring the single-directional movement, it can also measure the velocity components in multiple directions at the same time.
The main purpose
1. Measure the velocity and direction of the average flow.
2. Measure the pulsation velocity of the incoming flow and its frequency spectrum.
3. Measure the Reynolds stress in turbulent flow and the velocity dependence and time dependence of two points.
4. Measuring wall shear stress (usually by using a hot film probe placed flush with the wall, the principle is similar to hot wire velocimetry).
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.
