Laminar flow pipe system
OwnerPeter J. Murphyinventor
Life of this patent
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Abstract
A pipe system for conveying fluids having a straight pipe section with a Reynolds number exceeding 2200 by reason of the critical values of interior surface roughness of the pipe and of turbulence at the pipe section inlet, such values being defined, respectively, by the formulae: (e/d) R .ltoreq. 200 and (U/V) R.sup.1.67 .ltoreq. 3500
Claims4
A fluid conveying system having laminar fluid flow and a Reynolds number in excess of 2200, comprising a straight pipe of circular cross-section having an inlet and outlet, and fluid turbulence control means connected to said inlet for supplying said fluid to said inlet, said pipe having an internal roughness determined from the formula:
- (e/d) R .ltoreq. 200
- where e is the root mean square height of the roughness of the internal surface of the pipe, d is the internal diameter of the pipe, and R is the Reynolds number, and wherein said fluid turbulence control means is of a form in which the turbulence level of said fluid at said inlet conforms to the formula:
- (U/V)R.sup. 1.67 .ltoreq. 3500
- where U is the cross-section average of V', V' is the root mean square time average of (V - V"), V" is the time average of V, V is the axial velocity of the fluid, V is the cross-section average of V", and R is the Reynolds number.
Dependencies are inferred from the claim text.