flow restrictions for compressed air
flow restrictions for compressed air
(OP)
does anyone have the formula for calculating the maximum flow rate for compressed air through a pipe (say 6" dia)?
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flow restrictions for compressed air
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RE: flow restrictions for compressed air
v=(k*g*R(gas)*T)^0.5
Convert that to a volume flow rate, or a mass flow rate using the usual equations. You have choked flow (which is the maximum flow rate of a compressible fluid) whenever the downstream pressure is less than:
P(max choked) = P(upstream)*(2/(k+1))^(k/(k-1))
In both equations "k" is the ratio of specific heats and all pressures and temperatures must be in absolute terms.
If you are looking for a "maximum commercial" flow rate, then you'll have to restate your question. That value is very dependent upon maximum allowable velocity which is a function of pressure and temperature.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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RE: flow restrictions for compressed air
RE: flow restrictions for compressed air
For adiabatic flow, the Mach No. =1
For isothermal flow the Mach No. = sqrt (1/gamma), where gamma is the ration of the specific heats Cp/Cv
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