When measuring the static pressure at any position near the end of the pipeline, is the static pressure very close to atmospheric pressure? !
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The static pressure measured at the location near the pipeline’s atmospheric outlet is often zero, or very close to zero. What’s going on here? Please give me some advice.
It goes without saying what determines the flow rate in a pipeline, and at that flow rate, one can perform an energy balance between the pressure measurement point and the pipeline outlet to understand why； If a valve is added at the outlet and its opening degree is changed, the result will be different
Do you mean that the static pressure has been depleted?
The static pressure energy is converted, turning into drag loss, or potential energy, or kinetic energy (if there is any change)
When the pipeline is emptied into the atmosphere, the fluid pressure is measured near the outlet of the pipeline, and the reading is negative. Don’t ask why – I’m not going to tell you. But if you transfer some money as a fee to my bank account, things might change, haha :P