压力容器Issue(7)：16-21,6.DOI:10.3969/j.issn.1001-4837.2014.07.004
蒸汽发生器传热管湍流激励功率谱密度计算
Power Spectrum Density Calculation of Turbulent Excitation about Steam Generator Tubes
蒋庆磊 1张坤 1周继云 1王先元1
作者信息
- 1. 中核武汉核电运行技术股份有限公司，湖北武汉 430223
- 折叠
摘要
Abstract
Turbulent excitation is one of the flow-induced vibration mechanisms in steam generators,and also is the principal motivation of the tube fretting wear.To calculate the volume wear rate of tubes,power spectrum density(PSD)of turbulent excitation is necessary,which usually was obtained from experiment. To obtain the PSD of turbulent excitation based on CFD method,the numerical model of tube arrays was modeled,and the flow distribution in tube arrays was obtained based on the LES method,the flow-in-duced forces applied on the tube were saved and the PSD of the forces was calculated.The results showed that,the flow-induced forces applied on the tubes are broadband excitation with peak value characteris-tic,and the power of the forces was limited in certain frequency band.The results indicate a new method to obtain the PSD of turbulent excitation,which can significantly increase the efficiency of fretting wear a-nalysis.关键词
功率谱密度/湍流激励/流致振动/蒸汽发生器Key words
power spectrum density(PSD)/turbulent excitation/flow-induced vibration/steam generator分类
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蒋庆磊,张坤,周继云,王先元..蒸汽发生器传热管湍流激励功率谱密度计算[J].压力容器,2014,(7):16-21,6.
