Influence of Turbulence Intensities onto Transmission Line Conductor Wind Loads

Abstract:

The rationality of transmission line responses, tower responses, etc., are determined by the computed wind loads, which are directly correlated with the free-stream turbulences that generated at different ground roughness conditions, different terrains, etc.. Accounting for this problem, the flow fields around transmission line conductor LGJ630/45 are computed by solving Navier-Stokes equations to study the influence of Tis (turbulence intensities) onto wind load characteristics. The results show that, the peak-values of power spectrum density (PSD) results of both lift and drag are obviously influenced by TIs, while their corresponding frequencies are kept the same at different TIs; with the increase of Tis, the time-averaged value of conductor drag decreases nonlinearly and monotonically. Thus, given the influence of TIs onto wind loads, field observed free-stream values should be used as inputs for numerical simulations, and then the obtained wind loads can be adopted to accurately simulate transmission line gallopings and windage yaws.

• Periodical: Applied Mechanics and Materials (Volumes 241-244)
• Pages: 1344-1348
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.241-244.1344
• Online since: December 2012
• Authors: Hui Xue Dang, Feng Li Yang, Jing Bo Yang
• Keywords: Numerical Simulation, Rationality, Transmission Line Conductor, Turbulence Intensity, Wind Load

References

[1] Tefa Kaisara: Galloping Transmission Lines (TECHNISCHE UNIVERSITEIT EINDHOVEN, 2008).

[2] Public Service Commission of Wisconsin: Electric transmission lines: Electricity From Power Plants to Consumers (Public Service Commission of Wisconsin, Madison, 2009).

[3] Muhammad Bilal Waris, Takashi Ishihara and Muhammad Waheed Sarwar, in: Galloping response prediction of ice-accreted transmission lines, The 4th International Conference on Advances in Wind and Structures (2008).

[4] Xin Wang, Wen-Juan Lou, in: Numerical Approach to Galloping of Conductor, The Seventh Asia-Pacific Conference on Wind Engineering (2009 ).

[5] C.B. Gurung, H. Yamaguchi and T. Yukino, submitted to J. Journal of Wind Engineering and Industrial Aerodynamics (2003).

[6] Xiao-hui LIU, BoYAN, Hong-yan ZHANG, SongZHOU: submitted to J. Appl. Math. Mech. –Eng (2009) (in Chinese).

[7] YAN bo, LIN Xue-song, LUO Wei, LIU Zhong-quan, CHEN Zhi-da: submitted to J. Engineering Mechanics (2010) (in Chinese).

[8] A. Abdel Raouf, M. Galal and E.E. Khalilj, in: Heat Transfer Past a Single Cylinder: Numerical Investigations, 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition (Orlando) AIAA 2010-1358.

DOI: 10.2514/6.2010-1358