How do I calculate the cfm of a given pipe size at a given pressure. for example; gas blower output 10psi, pipe size 6'', pipe lenght 20', gas temp 110deg f, cfm- unknown.
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Phenom
ANSWERS: 1
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Info seems incomplete. What kind of gas, what kind of pipe, assumptions allowed, ... I guess you can assume it is an ideal gas, smoothe pipe, and no heat is lost thru the pipe wall, to make it easier. So, then, knowing the pressure drop is 10 psig over the 20 feet, or .5 psig/ft, back calculate the flow rate. I assume you have a Fluid Mechanics book with the basic equations in it. This can be an iterative calculation if the pipe is not smooth, and the temperature and gas properties change along the length, in which case you have to assume a flow rate at the inlet, calculate the temperature, gas properties, etc. incrementally along the length of the pipe, and see what overall pressure drop you end up with; if it is not 10 psi assume a new flow rate and do it again. Update the flow rate between interations using a half-interval search, Newton-Raphson, or other convergence technique.
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