The flow rate of compressed air is 10-15 m/s. Is there a relationship between the pipe size and the flow rate?
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Compressed air: pressure of 0.6–1 Mpa, flow rate of 10–15 m/s. Is there a relationship between the diameter of the pipe and the flow rate? At a pressure of 0.6 Mpa, is the exhaust flow rate the same for pipes with a diameter of 6 mm and 10 mm? How is the flow rate calculated? Please give some guidance. Thank you! ! !
Flow rate = flow velocity * cross-sectional area of the pipe; when the flow rate remains constant, a lower flow velocity corresponds to a larger cross-sectional area； Conversely, high flow rate with small cross-sectional area ； The surface area is proportional to the square of the tube band diameter ； Pressure has no direct relationship with flow rate, but it is related to velocity; the higher the velocity, the greater the resistance, which means a higher pressure is required to overcome that resistance ； What do you think? !
It is recommended to get a copy of \"Principles of Chemical Engineering\" to read; it is a reference book used in this industry, so it’s worth giving it a try.
If the pipe cross-sections are different, the flow velocities must be different as well. Just look it up in relevant reference books.
d=18.8√(Q/w), where d is the inner diameter of the pipe in mm, Q is the flow rate of the medium in m3/h, and w is the flow velocity of the medium in m/s
Regarding the calculation of the flow velocity of gas under actual conditions: Strictly speaking, under actual conditions, both the pressure and temperature of the gas inside the pipe are constantly changing. The gas pressure decreases due to transportation resistance, while the gas temperature changes as a result of heat transfer between the gas inside the pipe and the surrounding environment. Therefore, in general, the average pressure pm and average temperature tm are used for such calculations. The formula for the actual flow velocity of the gas is: ωr = 35.386 × V / (d² × Pm × (273 + Tm) / 273). Here, ωr represents the actual flow velocity of the gas, in m/s; Pm is the average pressure of the gas inside the pipe, in MPa; and Tm is the average temperature inside the pipe℃
What parameters do V and d2 represent? What is the unit?
The flow rate unit might be m3/h; d2 represents the square of the diameter in meters. It’s a very basic formula – once you understand it, you’ll be able to write it down. This formula looks strange; it’s probably because 3600 seconds of time have been taken into account
It’s definitely different; during actual operation, the pressure drop in the pipeline is equal to the pressure difference between the starting point and the ending point. The pressure drop in the pipeline is related to both the pipe diameter and the flow rate. See my post: https://bbs.hcbbs.com/thread-2953230-1-1.html