Flow coefficient of orifice plate flow meters
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Could some expert please tell me how to calculate the flow coefficient of a orifice plate flow meter? I found different answers online: is it Q=K√△P*ρ, or Q=KY√△P/ρ, or neither?
Q=KY√(△P/ρ); for liquids, Y can be taken as 1, while for gases, Y equals the compressibility coefficient
We generally don’t use the flow coefficient α of orifice plates; instead, we use the discharge coefficient C. Since you asked about the flow coefficient α, I’ll tell you that it should be α = Qm/(S*sqr(2△Pρ)). S represents the cross-sectional area of the pipe. I can’t remember it exactly; you can check standard 5167 for more details
Their DCS requires us to provide it
I don’t understand why DCS needs this There’s no need at all.