pressure loss

[nguyen03]

Hi all,
As I understand the pressure loss because the friction, type of the fluid, temperature, length of the hose (tube), turbulence, leakage, hose expansion etc ... all of these reason will change the flow rate of the fluid enter from one end of the hose and leave at the other end.
If I apply 1000 psi pressure at the pump, with 100 ft tube to the cylinder, the cylinder is fully extend and stop. Is the pressure at the cylinder still at 1000 psi or less? Assume there is absolutely no leakage in the system.
I think the pressure at the cylinder will go up to 1000 psi after no more flow in the system.

Thanks,

 

[3DDave]

You forgot delta-height. And the effect of transient pressure changes due to sudden stoppage of flow. Otherwise it should be close enough. That's the principle used in hydraulic scales where the output is a great distance from the input.

 

[hydroman247]

Yes, the pressure will rise to match once the flow stops. Pressure drops are created by flow.

 

[nguyen03]

Thanks for all comments.