Energy Losses in Cross Junctions
Publication: Journal of Hydraulic Engineering
Volume 136, Issue 1
Abstract
Energy losses occurring in pipe junctions have been studied for many years. Head loss coefficients are commonly used to characterize losses across elbows, tees, crosses, valves, and other pipe fittings. When accurate values of are used, the flow rate and corresponding total head at any location in a pipe network can be calculated. While is well defined for most pipe junctions and fittings, the literature has limited documentations of for crosses. This study was commissioned to determine for a wide range of flow combinations in a pipe cross with equal diameter pipes and varied flow combinations. This study provides and innovatively presents over 1,000 experimental values of for designing and analyzing equal diameter pipe crosses.
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References
ASME. (2006). “Test uncertainty.” ASME PTC 19.1-2005, New York.
Costa, N. P., Maia, R., Proenca, M. F., and Pinho, F. T. (2006). “Edge effects on the flow characteristics in a 90 deg tee junction.” ASME Trans. J. Fluids Eng., 128, 1204–1217.
Crane Co. (1988). “Flow of fluids through valves, fittings and pipe.” Technical Rep. No. 410, Crane Co., Joliet, Ill.
Finnemore, E. J., and Franzini, J. B. (2006). Fluid mechanics with engineering applications, 10th Ed., McGraw-Hill, New York.
Instrument Society of America (ISA).(1988). “Control valve capacity test procedure.” ANSI/ISA-S75.02-1988, N.C.
Ito, H., and Imai, K. (1973). “Energy loss at 90° pipe junctions.” J. Hydr. Div., 99(HY9), 1353–1369.
Miller, D. S. (1978). “Internal flow systems.” BHRA engineering series, Vol. 5, The British Hydromechanics Research Association (BHRA).
Oka, K., and Ito, H. (2005). “Energy losses at tees with large area ratios.” ASME Trans. J. Fluids Eng., 127, 110–116.
Ramamurthy, A. S., and Zhu, W. (1997). “Combining flows in 90° junctions of rectangular closed conduits.” J. Hydraul. Eng., 123(11), 1012–1019.
Ramamurthy, A. S., Qu, J., and Zhai, C. (2006). “3D simulation of combining flows in 90° rectangular closed conduits.” J. Hydraul. Eng., 132(2), 214–218.
Serre, M., Odgaard, A. J., and Elder, R. A. (1994). “Energy loss at combining pipe junctions.” J. Hydraul. Eng., 120(7), 808–830.
Wood, D. J., Reddy, L. S., and Funk, J. E. (1993). “Modeling pipe networks dominated by junctions.” J. Hydraul. Eng., 119(8), 949–958.
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© 2010 ASCE.
History
Received: Sep 17, 2008
Accepted: Jun 23, 2009
Published online: Jun 25, 2009
Published in print: Jan 2010
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