3013-10 Fluid Meters (1)

3013-10 Fluid Meters (1) - 4 2 2 1 C K − = ASME...

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3013-10 Fluid Meters Wednesday, September 8, 2010 Equations for friction factors Churchill Swamee-Jain Blasius Fluid Meters Obstruction Meters Venturi Meters + High pressure recovery – Large and heavy – Expensive Orifice Meters + Compact + Interchangeable orifice plate + Relatively inexpensive – Moderate pressure recovery ρ P C u o Δ = 2 4 1 β = d C C D D o = β For μ ρ Du Re = , Re > 30,000, C d 0.61 2 β o u u = Pemanent pressure loss
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Unformatted text preview: 4 2 2 1 C K − = ASME Correlation (Perry’s Section 10) 2 2 1 4 1 1 − = − − P P P P P 4 is 4 to 8 diameters downstream Area Meters Rotameters – visual Turbine Meters + Accurate – High maintenance (bearings) Coriolis Meters + Accurate – Expensive Positive Displacement Meters + Accurate – Limited to relatively small flow rates...
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