Wake Characteristics of Ice-Accreted Cylindrical Bars in a Cross-Flow at Subcritical Reynolds Numbers
Publication: Journal of Aerospace Engineering
Volume 31, Issue 2
Abstract
Ice accretion can considerably alter aerodynamic characteristics of bridge cables. The present study focuses on flow characteristics in the cable wake for three arrangements of ice accretion on the cable surface. This is studied for the subcritical flow regime (subcritical Reynolds numbers) at various downwind distances of the cable. The analysis is based on velocity and force measurements carried out in a boundary-layer wind tunnel. Two different bridge-cable models are used, i.e., smooth cylinder representing dry cable, and artificially roughened cable representing ice-accreted bridge cable. The effects of ice accretion on flow characteristics in the cable wake are particularly exhibited when ice is oriented laterally downward for the cable section mounted horizontally in the wind tunnel. This is characterized by strong velocity reduction and turbulence enhancement in the cable wake.
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Acknowledgments
The authors acknowledge the support of the Czech Science Foundation Project No. GA15-01035S, and the program of the Czech Ministry of Education, Youth and Sports LO1219 and RVO 68378297.
References
Bartoli, G., Cluni, F., Gusella, V., and Procino, L. (2006). “Dynamics of cable under wind action: Wind tunnel experimental analysis.” J. Wind Eng. Ind. Aerodyn., 94(5), 259–273.
Demartino, C., Koss, H. H., Georgakis, C. T., and Ricciardelli, F. (2015). “Effects of ice accretion on the aerodynamics of bridge cables.” J. Wind Eng. Ind. Aerodyn., 138, 98–119.
Demartino, C., and Ricciardelli, F. (2015). “Aerodynamic stability of ice-accreted bridge cables.” J. Fluids Struct., 52, 81–100.
Demartino, C., and Ricciardelli, F. (2017). “Aerodynamics of nominally circular cylinders: A review of experimental results for Civil Engineering applications.” Eng. Struct., 137, 76–114.
ESDU (Engineering Sciences Data Unit). (1986). “Mean forces, pressures and flow field velocities for circular cylindrical structures: Single cylinder with two-dimensional flow.”, London.
Gimsing, N. J., and Georgakis, C. T. (2012). Cable supported bridges: Concept and design, Wiley, London.
Gjelstrup, H., Georgakis, C. T., and Larsen, A. (2012). “An evaluation of iced bridge hanger vibrations through wind tunnel testing and quasi-steady theory.” Wind Struct., 15(5), 385–407.
Górski, P., Pospíšil, S., Kuznetsov, S., Tatara, M., and Marušić, A. (2016). “Strouhal number of bridge cables with ice accretion at low flow turbulence.” Wind Struct., 22(2), 253–272.
Gurung, C. B., Yamaguchi, H., and Yukino, T. (2002). “Identification of large amplitude wind-induced vibration of ice-accreted transmission lines based on field observed data.” Eng. Struct., 24(2), 179–188.
Impollonia, N., Ricciardi, G., and Saitta, F. (2011). “Vibrations of inclined cables under skew wind.” Int. J. Non-Linear Mech., 46(7), 907–918.
Jakobsen, J. B., et al. (2012). “Wind-induced response and excitation characteristics of an inclined cable model in the critical Reynolds number range.” J. Wind Eng. Ind. Aerodyn., 110, 100–112.
Koss, H. K., Gjelstrup, H., and Georgakis, C. T. (2012). “Experimental study of ice accretion on circular cylinders at moderate low temperatures.” J. Wind Eng. Ind. Aerodyn., 104–106, 540–546.
Král, R., Pospíšil, S., and Náprstek, J. (2016). “Experimental set-up for advanced aeroelastic tests on sectional models.” Exp. Tech., 40(1), 3–13.
Kumpf, J., Helmicki, A., Nims, D., Hunt, V., and Agrawal, S. (2012). “Automated ice inference and monitoring on the veterans’ glass city skyway bridge.” J. Bridge Eng., 975–978.
Macdonald, J. H. G., and Larose, G. L. (2006). “A unified approach to aerodynamic damping and drag/lift instabilities, and its application to dry inclined cable galloping.” J. Fluids Struct., 22(2), 229–252.
Makkonen, L., Laakso, T., Marjaniemi, M., and Finstad, K. J. (2001). “Modelling and prevention of ice accretion on wind turbines.” Wind Eng., 25(1), 3–21.
Matsumoto, M., Yagi, T., Shigemura, Y., and Tsushima, D. (2001). “Vortex-induced cable vibration of cable-stayed bridges at high reduced wind velocity.” J. Wind Eng. Ind. Aerodyn., 89(7–8), 633–647.
Matteoni, G., and Georgakis, C. T. (2015). “Effects of surface roughness and cross-sectional distortion on the wind-induced response of bridge cables in dry conditions.” J. Wind Eng. Ind. Aerodyn., 136, 89–100.
Schewe, G. (2001). “Reynolds-number effects in flow around more-or-less bluff bodies.” J. Wind Eng. Ind. Aerodyn., 89(14–15), 1267–1289.
Zdero, R., and Turan, O. F. (2010). “The effect of surface strands, angle of attack, and ice accretion on the flow field around electrical power cables.” J. Wind Eng. Ind. Aerodyn., 98(10–11), 672–678.
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Information
Published In
Journal of Aerospace Engineering
Volume 31 • Issue 2 • March 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Dec 23, 2016
Accepted: Aug 8, 2017
Published online: Dec 7, 2017
Published in print: Mar 1, 2018
Discussion open until: May 7, 2018
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