Find the pump inlet pressure?
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It is known that the liquid level at the inlet of a pump is 1 meter of water column (connected to the atmosphere), and the flow rate of the inlet pipeline is 2m/s. Assuming that the resistance of the inlet pipeline is negligible, what is the pressure (gauge pressure) at the inlet of the pump? This post was last edited by lkx646 on 2009-2-13 22:35 ]
Calculate the pipeline pressure drop based on the pipe length and pipeline accessories and then calculate the pump inlet pressure. There is a pipeline resistance calculation program posted by me on the forum.
The relative value of the inlet pressure is 1 meter of water column, and the absolute value is plus 1 atmospheric pressure, which is about 11 meters of water column.
Regardless of the liquid flow rate, the suction pressure of the pump = liquid injection height + backup pressure = atmospheric pressure (the liquid is connected to the atmosphere) backup pressure = the pressure value in the container where the liquid is located.
This question does not include the length and diameter of the inlet pipe and cannot be calculated.
The inlet pressure (gauge pressure) is smaller than 1 meter of water column. Specifically, the poster can calculate it using Bernoulli's equation. Conservation of energy (kinetic energy + potential energy + static pressure energy)