关键词: 防护栅栏, 动力学效应, 疏透度

Abstract: Research on aerodynamic effects of fence protective system is among the important issues to reveal its protective mechanism, and it also is a main part of application study of sand control engineering and blown sand physics. Based on published literatures, we review the half past centurys research progress on the aerodynamic mechanisms of fence protective system, cite some representative examples for each shelter type for discussion, and analyze some typical research conclusion on optimal porosity of sand fences. A deep understanding on aerodynamic effect of shelter fences has achieved and some massive research experience has accumulated, which provide import guiding role and reference for further study. It is thought that the factors influencing shelter fences protective effects are complex. The complexity of air flow patterns around the fence system makes the research of this problem depend mainly on model simulation and theoretical analysis, just as same as some simplification and hypothesis in the past study. Furthermore, the different understanding on the fence shelter process by researchers and their different emphases on the fence shelter make the judge standard of optimal porosity of sand fences to be different, which leads to the optimal porosity of fences reported by various investigators varies in a large ranges, hence cannot be put into directly practice. So it is still be very important to gather more experimental data by using modern high-accuracy measurement technology in further study.

Key words: shelter fence, aerodynamic effect, porosity