Stationary wavelet-based analysis and simulation of unsteady wind in aeolian sand transport

摘要：

To understand the effect of natural wind on sediment transportation,the stationary wavelet transform is utilized to analyze the time-frequency structure of gust measured in the Taklimakan desert. Based on the relationship between wavelet coefficients and turbulence energy structure,a method using the inverse stationary wavelet transform is proposed to generate artificial gust. The results show that the power spectrum of natural gust agrees with the Karman spectrum. Moreover,the gust in the near-surface layer exhibits explicit intermittency of turbulence. The low and high frequency parts of gust respectively determine the sediment transport in the general variation and the intermittency. The analysis of artificial gust and its comparison with natural wind demonstrate the validity of the presented method.

关键词： natural gust sediment transportation stationary wavelet transform artificial wind.

作者: Liu Jiang Wang Yuan Zhang Yang

作者单位: Fluid Engineering Department,School of Energy & Power Engineering,Xian Jiaotong University,Xian,710049,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 2917-2922

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）