The main pipeline with a DN800 diameter has a flow rate of 20 m/s; it splits into three branch pipelines with a DN300 diameter, which then converge to form a pipeline with a DN500 diameter. What is the flow rate in each of these pipelines?
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The main pipeline with a DN800 diameter has a flow rate of 20 m/s; it splits into three branch pipelines with a DN300 diameter, which then converge to form a pipeline with a DN500 diameter. What is the flow rate in each of these pipelines?
First, calculate that the total flow rate is 10.05 m3/s; the sum of the flow rates in the three branches equals the total flow rate. Since the nominal diameter of the pipes in all three branches is DN300, the flow rate in each branch is 3.35 m3/s. Converted to a flow velocity of 47.41 m/s. After the diameter reduction, the flow rate remains unchanged while the velocity increases; the calculated velocity is 51.2 m/s.