Measurement of the anemometer in the pipeline
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It has been proven that the 16mm probe of the anemometer is the most versatile. Its size guarantees good permeability and can withstand flow rates up to 60m/s. Airflow velocity measurement in the pipeline is one of the feasible measurement methods, and the indirect measurement procedure (gate measurement method) is applicable to air measurement.
Measurement of anemometer in exhaust air
The vents will greatly change the relatively uniform distribution of airflow in the duct: a high-speed zone is created on the surface of the free vent, and the rest is a low-speed zone, and vortices are generated on the grid. According to the different design of the grid, the airflow section is relatively stable at a certain distance (about 20cm) in front of the grid. In this case, the measurement is usually carried out using a caliber wheel of a large anemometer. Because larger calibers average the unbalanced flow rates and calculate the average over a larger range.
The anemometer is measured in the suction hole using a volumetric flow funnel
Even if there is no grid interference at the pumping, the air flow path has no direction and the airflow section is extremely uneven. The reason is that the partial vacuum in the pipe draws the air out of the air chamber in a funnel shape, and even in a region close to the suction, there is no position that satisfies the measurement condition, and the measurement operation can be performed. If the measurement is performed by the grid measurement method with the average value calculation function, and the volume flow method is used to measure and determine the volume flow rate, etc., only the pipe or funnel measurement method can provide repeatable measurement results. In this case, different sizes of measuring funnels can meet the requirements of use. A measuring funnel can be used to generate a fixed section at a certain distance in front of the flap valve to meet the flow rate measurement condition. The center of the section is measured and fixed, the center of the section is measured and the section is fixed, and the center of the section is measured and fixed. Here. The measured volume obtained by the flow probe is multiplied by the funnel coefficient to calculate the volumetric flow drawn.
How to use an anemometer for airflow measurement