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| Received:December 07, 2014 Revised:July 25, 2015 |
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| DOI：10.7511/jslx201603013 |
| KeyWord:triangular transmission tower latticed fully structured grid shape coefficient shielding effects flow interference |
| Author | Institution |
| 党会学 |
长安大学 建筑工程学院, 西安 ;中国电力科学研究院, 北京 |
| 赵均海 |
长安大学 建筑工程学院, 西安 |
| 张宏杰 |
中国电力科学研究院, 北京 |
| 牛华伟 |
湖南大学 风工程试验研究中心, 长沙 |
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| Abstract: |
| The crash down of transmission towers demands improved accuracy in wind load designing of ultra-high voltage transmission lines.Accounting to high fidelity simulation of flow around transmission tower,the applicability of fully structured multi-block grids for a triangular latticed tower section model is investigated by solving Navier-Stokes equations enclosed by k-ε turbulence model,shape coefficients from different standards are compared under designing tower,and shielding effects of this section model with complex flow interference are investigated.The results indicated that,fully-structured multi-block grids exhibit high orthogonality and conform well of this complex lattice tower section model;《BS8100》 gives conservative shape coefficients while these coefficients show similar trend comparing to both wind tunnel and numerical results;Induced by flow interferences among angle-steel trusses,the angle-steel bending forward shields much more seriously comparing to that bending leeward;the combination of leeward bending diagonal member and forward bending vertical bracing member,which induce flow interference between themselves,results in the most serious shielding performance. |
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