Steady conduit flow with spatially increasing discharge is analysed by a hydraulic approach. Particular attention is paid to the effects of viscosity, wall roughness, additional head-loss due to the lateral inflow and the lateral inflow intensity on the flow characteristics in the manifold. The governing system of equations is presented for collecting manifolds consisting of a large number of laterals and solved for prismatic perforated collecting pipes. The comparison with observations indicates a good agreement. Finally, collecting conduits by which uniform lateral inflow is achieved are discussed.
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References
1.
CitriniD.Correnti in pressione con portata variabile lungo il percorso. L'Energia Elettrica, 1952, 29, 277–285.
2.
IndriE.Ricerche sperimentali sui condotti emungenti da vasca. L'Energia Elettrica, 1958, 35, 1155–1164.
3.
KempfJ.Untersuchungen an einem Abluftsystem. Schweizerische Bauzeitung, 1964, 82, 175–181.
4.
NeceR. E.GoldsternP. G.BlackJ. L.Single-port suction manifolds. Proc. ASCE, J. Hydraulics Division, 1966, 92(HY1), 43–64; 1967, 93(HY1), 78.
5.
McNownJ. S.Mechanics of manifold flow. Trans. ASCE, 1954, 110, 1103–1142.
6.
BlaisdellF. W.MansonP. W.Energy loss at pipe junctions. Proc. ASCE, J. Irrigation and Drainage Division, 1967, 93(IR3), 59–78; 1968, 94(IR2), 280–282, (IR3), 352–353, (IR4), 523–525; 1970, 96(IR2), 218–222.
7.
AmorochoJ.DeVriesJ. J.Power losses and flow topologies in converging manifolds. Proc. ASCE, J. Hydraulics Division, 1971, 97(HY1), 81–99, (HY9), 1561; 1972, 98(HY4), 711.
SteeleJ. L.ShoveG. C.Design charts for flow and pressure distribution in perforated air ducts. Trans. ASAE, 1969, 220–224.
14.
BajuraR. A.A model for flow distribution in manifolds. Trans. ASME, J. Engng for Power, January 1971, 7–12.
15.
HagerW. H.Flow in distribution conduits. Proc. Instn Mech. Engrs, Part A, 1986, 200(A3), 205–213.
16.
Idel'cikI. E.Memento des pertes de charge. In Collection de la direction des études et recherches d'Electricité de France, 2nd edition, Vol. 13, 1979 (Eyrolles, Paris).
17.
FavreH.Sur les lois régissant le mouvement des fluides dans les conduites en charge avec adduction latérale. In Revue Universelle des Mines, 8th edition, Vol. XIII, No. 12, December 1937.
18.
GardelA.Les pertes de charge dans les écoulements au travers de branchements en té. Bull. Technique de la Suisse Romande, 1957, 83, part I, 123–130; part II, 143–148.
19.
VischerD.Die zusätzlichen Verluste bei Stromvereinigungen in Druckleitungen. In Arbeit aus dem Theodor-Rehbock-Flussbaulaboratorium, 1958, No. 147 (Technical University of Karlsruhe, Karlsruhe).
20.
GardelA.RechsteinerG. F.Les pertes de charge dans les branchements en té des conduites de section circulaire. Bull. Technique de la Suisse Romande, 1970, 96, No. 25.
