Local resistance characteristics of highly concentrated coal-water slurry flow through fittings

Meng Liu; Liangyong Chen; Yufeng Duan

Korean Journal of Chemical Engineering, Vol.26, No.2, 569-575, March, 2009

DOI10.1007/s11814-009-0097-7 Export Citation

Local resistance characteristics of highly concentrated coal-water slurry flow through fittings

Meng Liu, Liangyong Chen, and Yufeng Duan^†

School of Energy and Environment, Southeast University, Nanjing, 210096, China

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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 Le/D behaviors, that is, Le/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.

Keywords:Coal-water Blurry;Resistance Characteristics;Gradual Contraction;Sudden Contraction;Elbow

[References]

Cen KF, Yao Q, Cao XY, Theory and application of combustion, flow, heat transfer, gasification of coal-water slurry, Zhe Jiang University, Publications, Hang Zhou (1997)
Yu HL, Liu JZ, Fan XW, Proc. Chin. Soc. Electr. Eng., 26, 80 (2006)
Choi YC, Park TJ, Kim JH, Lee JG, Hong JC, Kim YG, Korean J. Chem. Eng., 18(4), 493 (2001)
Sung DJ, Kang SH, Korean J. Chem. Eng., 41, 1 (1997)
Turian RM, Stabi1ity, rheology and flow in pipes, bends, fittings, valves and venturi meters of concentrated non-newtonian suspensions, Chicago, University of Illinois (1987)
Etema SG, Int. Comm. Heat Mass. Transfer., 31, 763 (2004)
Edwards MF, Jadallah MSM, Smith R, Chem. Eng. Res. Des., 1, 57 (1985)
Bandala-Rocha MR, Macedo RC, Ramirez Velez-Ruiz JF, Inf. Technol., 16, 73 (2005)
Polizelli MA, Menegalli FC, Telis VRN, Braz. J. Chem. Eng., 20, 455 (2003)
Turian RM, Ma TW, Hsu FLG, Sung MDJ, Plackmann GW, Int. J. Multiph. Flow, 24(2), 243 (1998)
Tarun KB, Sudip KD, Pet. Sci. Eng., 55, 156 (2007)
Telis-Romero J, Polizelli MA, Gabas AL, Telis VRN, Can. J. Chem. Eng., 83(2), 186 (2005)
Fester V, Mbiya B, Slatter P, Chem. Eng. J., in press. (2008)
Marn J, Ternik P, Fluid Dyn. Res., 38, 295 (2006)
Lee DR, Park S, Korean J. Chem. Eng., 18(3), 277 (2001)
Dean WR, Philos. Mag., 20, 208 (1927)
Dean WR, Philos. Mag., 30, 673 (1928)
Rogers GFC, Mayhew YR, Int. J. Heat Mass. Transfer., 7, 1207 (1994)
Singh RP, Mishra PJ, Chem. Eng. Japan, 13, 275 (1980)
Chasik P, Lee LS, Hoon K, Int. J. Refrigeration, 30, 1168 (2007)
Boger DV, Gupta R, Tanner RI, J. Non-Newtonian Fluid Mec., 4, 239 (1978)
Spedding PL, Benard E, Crawford NM, Exp. Thermal. Fluid Sci., 32, 827 (2007)
Spedding PL, Benard E, Exp. Thermal. Fluid Sci., 31, 761 (2007)
Rosa S, Pinho FT, Int. J. Heat. Fluid Flow., 27, 319 (2006)
Hooper WB, Mcketta JJ, Encyclopedia of Chem. Pro. Des., 39, 19 (1991)
Nam SR, Dae HS, Fuel, 74, 1313 (1995)
Takami T, Sudou K, Tomita Y, Bull. JSME, 29, 3755 (1986)
Rathna SL, Proceedings of the fluid mechanical symposium, Indian Institute of Science, Bangalore, 378 (1967)

[1] Cen KF, Yao Q, Cao XY, Theory and application of combustion, flow, heat transfer, gasification of coal-water slurry, Zhe Jiang University, Publications, Hang Zhou (1997)

[2] Yu HL, Liu JZ, Fan XW, Proc. Chin. Soc. Electr. Eng., 26, 80 (2006)

[3] Choi YC, Park TJ, Kim JH, Lee JG, Hong JC, Kim YG, Korean J. Chem. Eng., 18(4), 493 (2001)

[4] Sung DJ, Kang SH, Korean J. Chem. Eng., 41, 1 (1997)

[5] Turian RM, Stabi1ity, rheology and flow in pipes, bends, fittings, valves and venturi meters of concentrated non-newtonian suspensions, Chicago, University of Illinois (1987)

[6] Etema SG, Int. Comm. Heat Mass. Transfer., 31, 763 (2004)

[7] Edwards MF, Jadallah MSM, Smith R, Chem. Eng. Res. Des., 1, 57 (1985)

[8] Bandala-Rocha MR, Macedo RC, Ramirez Velez-Ruiz JF, Inf. Technol., 16, 73 (2005)

[9] Polizelli MA, Menegalli FC, Telis VRN, Braz. J. Chem. Eng., 20, 455 (2003)

[10] Turian RM, Ma TW, Hsu FLG, Sung MDJ, Plackmann GW, Int. J. Multiph. Flow, 24(2), 243 (1998)

[11] Tarun KB, Sudip KD, Pet. Sci. Eng., 55, 156 (2007)

[12] Telis-Romero J, Polizelli MA, Gabas AL, Telis VRN, Can. J. Chem. Eng., 83(2), 186 (2005)

[13] Fester V, Mbiya B, Slatter P, Chem. Eng. J., in press. (2008)

[14] Marn J, Ternik P, Fluid Dyn. Res., 38, 295 (2006)

[15] Lee DR, Park S, Korean J. Chem. Eng., 18(3), 277 (2001)

[16] Dean WR, Philos. Mag., 20, 208 (1927)

[17] Dean WR, Philos. Mag., 30, 673 (1928)

[18] Rogers GFC, Mayhew YR, Int. J. Heat Mass. Transfer., 7, 1207 (1994)

[19] Singh RP, Mishra PJ, Chem. Eng. Japan, 13, 275 (1980)

[20] Chasik P, Lee LS, Hoon K, Int. J. Refrigeration, 30, 1168 (2007)

[21] Boger DV, Gupta R, Tanner RI, J. Non-Newtonian Fluid Mec., 4, 239 (1978)

[22] Spedding PL, Benard E, Crawford NM, Exp. Thermal. Fluid Sci., 32, 827 (2007)

[23] Spedding PL, Benard E, Exp. Thermal. Fluid Sci., 31, 761 (2007)

[24] Rosa S, Pinho FT, Int. J. Heat. Fluid Flow., 27, 319 (2006)

[25] Hooper WB, Mcketta JJ, Encyclopedia of Chem. Pro. Des., 39, 19 (1991)

[26] Nam SR, Dae HS, Fuel, 74, 1313 (1995)

[27] Takami T, Sudou K, Tomita Y, Bull. JSME, 29, 3755 (1986)

[28] Rathna SL, Proceedings of the fluid mechanical symposium, Indian Institute of Science, Bangalore, 378 (1967)