| 蔡萌琦,周林抒,严波,刘小会,黄汉杰*.覆冰四分裂导线动态气动系数风洞试验[J].实验力学,2020,35(2):267~275 |
| 覆冰四分裂导线动态气动系数风洞试验 |
| Wind tunnel tests on dynamic aerodynamic coefficients of iced quad bundle conductors |
| 投稿时间：2018-06-01 修订日期：2018-07-25 |
| DOI：10.7520/1001-4888-18-134 |
| 中文关键词: 四分裂导线 覆冰 动态空气动力系数 风洞试验 |
| 英文关键词:quad bundle conductors ice dynamic aerodynamic coefficients wind tunnel test |
| 基金项目:国家自然科学基金(No.51507106；No.51277186；No.51308570) |
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| 中文摘要: |
| 覆冰导线舞动是由这些导线的气动不稳定性引起的。由于导线动态空气动力特性不同于静态气动系数，本文针对新月形冰形制作了覆冰四分裂导线模型，通过风洞试验动态测试的装置设定可测量不同扭转频率下的空气动力系数。风洞试验得到了不同扭转运动频率、风速和覆冰厚度等关键工况下新月形覆冰四分裂导线的动态空气动力系数。风洞试验结果显示，动态气动系数与静态气动系数存在显著差异。不同于静态气动系数,动态气动系数曲线是环形的，多种参数对气动系数影响明显。结果表明，风洞试验结果为覆冰分裂导线运动研究及其防治技术提供了必要的数据。 |
| 英文摘要: |
| The dynamic aerodynamic characteristics of conductors are different from the static aerodynamic characteristics. In this work, we establish a test model of iced quad bundle conductors based on crescent-shaped ice, and measure the dynamic aerodynamic coefficients of the iced quad bundle conductors under torsional vibrations by using a dynamic test device in the wind tunnel. The curves of dynamic aerodynamic coefficients of crescent-shaped iced quad bundled conductors varying with wind attack angles under different wind velocities, torsional vibration frequencies and ice thicknesses are obtained. The results show that different parameters have certain effects on dynamic aerodynamic coefficients, and there are obvious differences between dynamic and static aerodynamic coefficients of the iced quad bundle conductors. The wind tunnel results provide necessary data for the investigations on the oscillation and prevention technique of the iced quad bundle conductors. |
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