For precise measurement of the swirling vortex flowmeter,CFD numerical simulation with a DN20 caliber was utilized as the focus.Simulation revealed a phenomenon similar to the detachment of a blunt body vortex street,confirming the reliability of simulation work.Analyzing pressure differences at various tapping points under low-flow conditions,the optimal tapping point within the DN20 fluid domain was identified.Placing a piezoelectric sensor at this optimal point,experiments were conducted using a sonic nozzle device.Comparison of experimental and simulation data showed a discrepancy.To understand this,the piezoelectric sensor large volume within the small-caliber shell was focused on.Simulating the fluid domain before and after removing the sensor's volume,the K-value coefficient with smaller error after removal was found,indicating the sensor volume affecting the internal flow field.Ad-ditionally,placing the sensor probe within the flowmeter increased its pressure loss.
关键词
旋进旋涡流量计/数值模拟/压电传感器/压力损失/取压点
Key words
precession vortex flowmeter/numerical simulation/piezoelectric sensor/pressure loss/pressure measuring point
维普
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