Abstract：Based on the theoretical model of differential pressure flowmeter under the condition of pulsating flow, the algorithm of calculating instantaneous pulsating flow by double-channel differential pressure is given. The flow field in Venturi tube is simulated by FLUENT software, and then the calculation method of pulsating flow is verified. The simulation results show that the maximum error can be up to 100% when calculating the fluctuating flow by single-channel pressure, and the maximum error can be reduced to about 5% when calculating the fluctuating flow by double-channel differential pressure.
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2020, Vol. 41 
