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应用节流装置(孔板、喷咀和文丘利管)来测量流量是化工部门广泛采用的一种经验成熟的方法。当流体通过节流装置时,根据水力学原理推导出流量与差压的关系式如下:G=1.252·α·ε·d_t~2·(△P·γ)~(1/2);或G=1.252·α·ε·m·d_t~2·(△P·γ)~(1/2)公斤/小时 (1)式中:G——流体在管道内的流量,公斤/小时;△P——流体通过节流装置时,在节流装置前后所产生的差压(压力差△P=
The use of throttling devices (orifice plates, nozzles and venturi tubes) to measure flow is a well-established method widely used in the chemical industry. When the fluid passes through the throttling device, the relationship between the flow rate and the differential pressure is deduced from the principle of hydraulics as follows: G = 1.252 · α · ε · d_t ~ 2 · (ΔP · γ) ~ (1/2); or G = 1.252 · α · ε · m · d_t ~ 2 · (ΔP · γ) ~ (1/2) kg / h (1) where: G is the flow rate of the fluid in the pipeline, kg / - When the fluid passes through the throttling device, the differential pressure generated before and after the throttling device (pressure difference ΔP =