Research on the Accurate Detection Method of the Flow Rate of the Inlet Section of the Grain Ventilator for Bungalow Storage
Mechanical ventilation is an important measure to ensure grain food security storage,which is of great significance for maintaining the safety of national grain storage.In order to solve the difficult problem of accurate measurement of fan airflow in the ventilation process,a method of measuring the flow rate of the inlet section of the ventilation fan of horizontal warehouse is proposed,taking the 4-72-6C centrifugal ventilator as the object,es-tablishing a model for ventilation of a grain silo and selecting the height of the grain layer from 4.5 m to 7 m as the load of the fan ventilation condition,detecting the flow rate of the inlet section of the fan by means of numerical simulation,and fitting the flow rate measurement correction coefficient,in order to find the best position of the wind speed measurement plane and the best node arrangement scheme of the monitoring point.The results show that the optimal location of the measurement plane is 0.5 m in front of the fan inlet,and the scheme of 4-node monitoring point is the most effective.
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