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| Research on high-precision numerical simulation method for flow induced vibration of wind turbine tower |
| Received:September 16, 2023 Revised:December 19, 2023 |
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| DOI：10.7511/jslx20230916002 |
| KeyWord:numerical simulation flow induced vibration spectral element method coordinate transformation wind turbine tower |
| Author | Institution |
| 王柯钦 |
浙江大学 能源工程学院, 杭州 ;大连理工大学 能源与动力学院, 大连 |
| 王志成 |
大连理工大学 能源与动力学院, 大连 |
| 姜孝谟 |
大连理工大学 能源与动力学院, 大连 |
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| Abstract: |
| In this paper,the high-precision spectral element method is used to simulate the flow induced vibration when the Reynolds number is 1000,the length diameter ratio of the cylinder is 60,and the height of the cylinder is half of the height of the calculation domain.The coordinate transformation method is used to deal with the problem of boundary movement in the process of vibration.By simulating the cylinder with or without flow induced vibration,the force on the cylinder surface is obtained under two conditions.The relationship between the power spectral density of the relevant parameters and the frequency in the height direction is obtained through fast Fourier transform.Afterwards, λ2 vortex recognition method is used to visualizes the distribution of vortices in the flow field.The results show that there is a certain degree of symmetry in the height direction when the cylinder is stationary,and it oscillates periodically in the y-direction direction.The two-dimensional vorticity cloud map shows that the vortex wake follows a standard "2S" shape pattern.In the case of a cylinder with flow induced vibration,the force and displacement are concentrated at the top of the cylinder as a whole,and periodic oscillation occurs in the y-direction due to a certain symmetry.A "lock in" phenomenon occurs at a frequency of 0.127,resulting in a significant displacement and force.The vortex distribution in its flow field becomes more scattered and complex.Finally,by integrating the calculation results,it is preliminarily concluded that the high-precision spectral element method has sufficient accuracy and application scope in simulating flow induced vibration of wind turbine towers. |
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