Does the different density of the medium affect the head of the pump?
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It turns out that the medium transported by the pump is water, with a head of 80 meters. If it is changed to transport gasoline with a density of 0.7 kilograms per cubic meter, will there be a significant change in the outlet pressure of the pump? With all other conditions remaining the same, thank you; those who know please let me know
Changes in medium density affect the head of the pump. According to the principles of fluid mechanics, head is related to the density of the fluid. If the same pump is used to transport gasoline with a lower density (0.7 kg/m³) instead of water, then, with the same rotation speed and other conditions remaining unchanged, the outlet pressure of the pump will decrease, thereby increasing the head. This is because gasoline is lighter than water, and the energy provided by the pump allows the gasoline to be pushed higher. Therefore, if it is changed to transporting gasoline, the head of the pump will actually be higher than when transporting water. .
According to Newton’s tenth law, I don’t submit to anyone except you
Find a performance curve diagram for a centrifugal pump and see what affects the head It’s clear at a glance.
Gasoline must have a density of 0.7 tons per cubic meter; simply put, it’s the ratio of head to density. 80/0.7=114m.
It’s 0.7 kg/L, right? Additionally, when using the same pump but changing the medium, the head remains almost unchanged at the same flow rate; however, if the density of the medium decreases, the pressure at the pump outlet will decrease as well
Once the hydraulic model design is completed, the head is also determined. It does not change with the medium. The pump outlet pressure changes due to differences in medium density. Pressure ≠ head. The head height can be reduced by turning the blades. The head of the same pump changes as the pump flow rate changes.
This post was last edited by xlxuiin on 2024-11-3 17:05