Can a pressure gauge actually measure dynamic pressure? ? ?
Thread Content
I understand on my own that a pressure gauge can only measure the sum of static pressure energy and potential energy, but not dynamic pressure energy; however, while browsing the internet, I found that many people think it can measure dynamic pressure energy, which left me a bit confused. Could everyone please confirm whether it is indeed possible to measure dynamic pressure energy?
Let’s learn what static pressure energy is and what dynamic pressure energy is Does it refer to the pressure in the reactor and the pressure at the pump head?
When the fluid is not in motion, its pressure value represents the static pressure energy； The kinetic energy of fluid flow is dynamic pressure energy ； The pressure resulting from height is called potential energy.
I’ve learned that static pressure can definitely be measured, and potential energy isn’t a problem either. As for dynamic pressure, my understanding is that the pressure at the pump outlet should equal the pressure of the material at a certain height plus the pressure of the material at the highest point. The material pressure at the highest point can be measured, because according to the formula, there is no potential energy left
To measure dynamic pressure, the pressure probe can be inserted into the center of the pipe, with its opening facing the flow direction, just like the static pressure probe in a pitot tube; in fact, what the static pressure probe in a pitot tube measures is dynamic pressure.
I remember that the pressure gauge indicated the static pressure value
The 5th floor is correct; it is possible to measure it, but it works by transferring the dynamic pressure energy through pressure transfer
It is impossible to measure dynamic pressure energy, as it has all been converted into flow velocity; it does not exist in the form of pressure at all.
A pressure gauge measures static pressure, not dynamic pressure~~
The 5th floor is absolutely correct. Achieve high scores in chemistry. Ordinary pressure gauges measure static pressure, as there is a flow velocity at this time; the dynamic head is associated with the flow velocity and is not reflected in the pressure gauge. A Pitot tube uses pressure to measure velocity, which directly answers the original poster’s question. At point A, the pressure measured is the static pressure; at point B, since the velocity is 0, the pressure measured is the sum of static pressure and dynamic pressure. Then, the dynamic pressure value is represented using a U-tube to determine the velocity.