Abstract: In order to study the effects of bundle conductor’s aerodynamic interference on shape coefficient, different types conductors are chosen for model wind tunnel test of real conductor section to analyze the factors that affect the shape coefficient, including conductor cross-section, wind speed, wind attack angle, bundle number and flow field. The test result shows that the shape coefficient of double bundle conductors increases with the wind attack angle before deflection critical position. When the wind attack angle reaches the critical position, the increase of wind attack angle has no effect on the shape coefficient of double bundle conductors. The shape coefficient of 4-, 6-, and 8-bundle conductors increases first and then decreases with changing of wind attack angle, with the peak reaching at a certain angle. The bundle conductors shape coefficient under the condition of 10% turbulence intensity is larger than that in the uniform flow field by 10%~15%. In the scenario of 30 m/s wind speed under turbulence, the shape coefficient of 4-, 6-, and 8-bundle conductor JL/G1A-630/45 are respectively reduced by 27.60%, 24.38% and 22.51% compared to the value specified by design code.

Key words: wind speed, wind attack angle, bundle conductor, wind tunnel test, shape coefficient