How to use an anemometer for airflow measurement?
I. Measurement of anemometers in pipelines
Practice has shown that the 16mm probe of the anemometer is more versatile. Its size guarantees good permeability and can withstand flow velocities of up to 60m/s. Airflow velocity measurement in the pipeline as one of the feasible measurement methods, direct measurement protocol (gate measurement method) practical air measurement.
Second, the anemometer in the pumping exhaust measurement
Vent will greatly change the airflow in the pipeline relative balance of the dispersion pattern: in the self-vent outside the surface of the formation of high-speed zone, other parts of the low-speed zone, and the formation of vortices on the grid. Depending on the design of the grille, the airflow cross-section is more stable at a certain interval (about 500px) in front of the grille. In this case, measurements are usually carried out with a large anemometer aperture rotor. Because of the larger calibre may be uneven flow rate uniformity, and in a larger range of calculation of its uniform value.
Third, the anemometer in the pumping hole using the volume flow funnel to implement measurement
Even if there is no grid in the extraction of pre-disturbance, the air flow path has no direction, and the cross-section of the airflow is extremely uneven. This is due to the partial vacuum in the pipeline, which funnels the air out of the air chamber, and even in the area close to the extraction, there is no location that meets the measurement conditions for the measurement operation. In the case of measurement using the gate measurement method with a uniform value calculation function, measurement using the volume flow rate determination method, and determination of the volume flow rate, etc., repeatable measurement results can be provided by the pipe or funnel measurement method. In this case, measuring funnels of different sizes are available to meet the application requirements. The application of the measuring funnel can be used to generate a fixed cross-section at a certain interval in front of the lamella valve to meet the conditions for flow rate measurement, to measure out the centre of the cross-section and to fix the cross-section, to measure out the centre of the cross-section and to fix the cross-section. The measured value obtained by the flow rate probe is multiplied by the funnel coefficient to calculate the volume flow rate pumped.
