Study of Flow Measurement Based on Parallel Duct

In order to realize real-time online monitoring of airflow in ventilation ducts and change the status of traditional intrusive air measurement equipment, which may not be reasonably used in actual industrial production. In this paper, the existing circular air ducts are modified into the form of parallel air ducts, and suitable air measurement segments are selected to measure the air volumes of both the secondary and primary air ducts at the same moment. After getting the air volume of each pipeline in the parallel duct through the measurement cylinder experiment, the air volume of the secondary duct and the total air volume data of the main duct were fitted, and the fitting formula between them was obtained. At the same time, the total air volume of each pipeline in the parallel duct before and after the summation of air flow was compared, and the average error was 2.29%. This shows that the parallel duct wind measurement method proposed in this paper has certain feasibility and provides some reference significance for some working conditions where the operating equipment in the duct cannot be operated reasonably due to the limitations of traditional invasive measuring instruments.