Abstract: The turbulent flow near the windbreak is simulated in the boundary layer wind tunnel. Wavelet analysis is used to study the turbulent signal in the lee side of the windbreak. Compared with the flow without windbreak, the turbulent energy and the frequency of vortex are reduced dramatically. The evidence shows how the wind break prevents the dust emission.

Key words: surface layer, turbulent structure, wavelet analysis, dust emission prevention

摘要： 在边界层风洞中模拟了防风网附近的湍流流动，应用子波分析对防风网泄流的湍流信号进行了研究，发现与无防风网平坦条件相比，湍涡的能量及发生的频率都有显著降低。这说明，防风网在降低风速的同时也降低了湍涡发生频率，起到抑制起尘的作用。

关键词: 近地面层, 湍流相干结构, 子波分析, 起尘抑制