Abstract
The local resistance characteristics of high concentration coal-water slurry (CWS) flowing through three types of local fittings, namely the gradual contractions, sudden contractions and 90° horizontal elbows, were investigated at a transportation test facility. Results show that the local resistance loss of gradual contractions decreases as the contraction angle increases. When pipe diameter ratio varies little, local resistance loss of sudden contractions changes insignificantly. There is an optimal value of bend diameter ratio, at which the local resistance loss of horizontal elbows is the least. As Reynolds number increases, the resistance coefficients of all the three fittings first reduce and then stabilize, while the three pipes have different ratio of equivalent length to pipe diameter L e /D behaviors, that is, L e /D of the gradual contractions decreases gradually and then keeps stable; that of the sudden contractions diminishes at first and then increases, and that of the horizontal elbows increases linearly.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
K. F. Cen, Q. Yao and X. Y. Cao, Theory and application of combustion, flow, heat transfer, gasification of coal-water slurry, Zhe Jiang University, Publications, Hang Zhou (1997).
H. L. Yu, J. Z. Liu and X.W. Fan, Proc. Chin. Soc. Electr. Eng., 26, 80 (2006).
Y. C. Choi, T. J. Park and J. H. Kim, Korean J. Chem. Eng., 18, 493 (2001).
D. J. Sung and S. H. Kang, Korean J. Chem. Eng., 14, 1 (1997).
R. M. Turian, Stabi1ity, rheology and flow in pipes, bends, fittings, valves and venturi meters of concentrated non-newtonian. suspensions, Chicago, University of Illinois (1987).
S. G. Etema, Int. Comm. Heat Mass. Transfer., 31, 763 (2004).
M. F Edwards, M. S. M. Jadallah and R. Smith, Chem. Eng. Res. Des., 1, 57 (1985).
M. R. Bandala-Rocha, R. C. Macedo and J. F. Ramirez Velez-Ruiz, Inf. Technol., 16, 73 (2005).
M. A. Polizelli, F. C. Menegalli and V. R. N. Telis, Braz. J. Chem. Eng., 20, 455 (2003).
R. M. Turian, T.W. Ma and F. L. G. Hsu, Int. J. Multiphase. Flow., 24, 243 (1998).
K. B. Tarun and K. D. Sudip, Pet. Sci. Eng., 55, 156 (2007).
T. R. Javier, M. A. Polizelli and L. G. Ana, Can. J. Chem. Eng., 83, 186 (2005).
V. Fester, B. Mbiya and P. Slatter, Chem. Eng. J., (2008), in press.
J. Marn and P. Ternik, Fluid Dyn. Res., 38, 295 (2006).
D. R. Lee and S. Park, Korean J. Chem. Eng., 18, 277 (2001).
W. R Dean, Philos. Mag., 20, 208 (1927).
W. R Dean, Philos. Mag., 30, 673 (1928).
G. F. C. Rogers and Y. R. Mayhew, Int. J. Heat Mass. Transfer., 7, 1207 (1994).
R. P. Singh and P. J. Mishra, Chem. Eng. Japan, 13, 275 (1980).
P. Chasik, L. Sunil Lee and K. Hoon, Int. J. Refrigeration, 30, 1168 (2007).
D. V. Boger, R. Gupta and R. I. Tanner, J. Non-Newtonian Fluid. Mec., 4, 239 (1978).
P. L. Spedding, E. Benard and N. M. Crawford, Exp. Thermal. Fluid Sci., 32, 827 (2007).
P. L. Spedding and E. Benard, Exp. Thermal. Fluid Sci., 31, 761 (2007).
S. Rosa and F. T. Pinho, Int. J. Heat. Fluid Flow., 27, 319 (2006).
W. B. Hooper and J. J. Mcketta, Encyclopedia of Chem. Pro. Des., 39, 19 (1991).
S. R. Nam and H. S. Dae, Fuel, 74, 1313 (1995).
T. Takami, K. Sudou and Y. Tomita, Bull. JSME, 29, 3755 (1986b).
S. L. Rathna, Proceedings of the fluid mechanical symposium, Indian Institute of Science, Bangalore, 378 (1967).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Liu, M., Chen, L. & Duan, Y. Local resistance characteristics of highly concentrated coal-water slurry flow through fittings. Korean J. Chem. Eng. 26, 569–575 (2009). https://doi.org/10.1007/s11814-009-0097-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-009-0097-7