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气体超声波流量计测量的流量是沿超声波传播途径上的线平均流速,不等于管内实际平均流速,必须加以修正。本文导出层流和紊流状态下的动力流速修正系数表达式,并介绍计算机在线处理方法,给出实验结果。
Gas ultrasonic flowmeter to measure the flow along the ultrasonic transmission line on the average flow rate is not equal to the actual average velocity inside the tube must be corrected. In this paper, the expression of correction factor of dynamic flow velocity in the condition of laminar flow and turbulent flow is derived. The on-line computer processing method is introduced and the experimental results are given.