基于数值模拟与风洞试验的多分裂导线阻力系数干扰效应研究
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1.国网福建省电力有限公司建设分公司;2.长沙理工大学;3.中国电建集团福建省电力勘测设计院有限公司

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国家自然科学基金项目(面上项目,51778072)


Study of interference effect of drag coefficient of bundled conductors based on numerical simulation and wind tunnel test
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1.Construction branch of State Grid Fujian Electric Power Co., Ltd;2.Changsha University of Science &3.Technology;4.PowerChina Fujian Electric Power Engineering Co., Ltd.

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    摘要:

    为研究分裂导线阻力系数随风攻角与分裂间距的变化规律,本文采用CFD数值模拟方法研究了不同分裂数与分裂间距下的低风压导线阻力系数随风攻角的变化规律;在边界层风洞中开展了90cm长的导线节段模型试验,获得了低风压导线不同风攻角条件下导线阻力系数随雷诺数、尾流干扰的变化规律,并与数值模拟结果进行对比。研究结果表明:多分裂导线阻力系数干扰效应明显,随着分裂数的增加,平均阻力系数可降低20%以上;多分裂导线阻力系数随风攻角变化明显,在风偏的情况下将出现风阻系数峰值:二分裂导线在风攻角为18°~24°出现峰值,四分裂导线在风攻角为22.5°~30°出现峰值;分裂导线风荷载设计应考虑风偏下的不利影响,以及干扰效应影响。

    Abstract:

    In order to study the variation law of drag coefficient of bundled conductor with wind direction angle and splitting distance, the variation law of conductor drag coefficient with wind direction angle under different splitting number and splitting spacing were conducted by CFD numerical simulation based on FLUENT software platform; wind tests with a 90 cm long conductor section model were carried out in the boundary layer wind tunnel, and the drag coefficient of conductor under different wind attack angles influenced by the Reynolds number and interference effect were obtained, and then the results were compared with that obtained from the numerical simulation. The results show that: the interference effect of drag coefficient of multi bundle conductor is obvious, and the average drag coefficient can be reduced by more than 20% with the increase of the number of splits. the drag coefficient of multi bundled conductor changes obviously with the wind attack angle, and the peak value of wind drag coefficient will appear in the case of wind deviation: The peak value of binary fission conductor appears at wind attack angle of 18° ~ 24°, and the peak value of quadripartion conductor appears at wind attack angle of 22.5° ~ 30°; the adverse influence of wind deviation and the influence of interference effect should be considered in the wind load design of bundled conductor.

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  • 收稿日期:2021-05-12
  • 最后修改日期:2021-07-13
  • 录用日期:2021-09-11
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